Strawberry Crop Protection Solutions

Major Strawberry Pests and Integrated Pest Management

Strawberry pest management should be based on accurate pest identification, field monitoring, and targeted control measures.

Two-Spotted Spider Mite

Scientific name: Tetranychus urticae

The two-spotted spider mite is a major foliar pest in strawberry production. It primarily feeds on the undersides of leaves, damaging leaf cells and reducing normal photosynthetic activity.

Main symptoms:

• Small yellowish-white spots appear on leaves.
• Leaves gradually lose their green color.
• In severe cases, leaves turn bronze or brown.
• Fine webbing may appear under heavy infestations.
• Plant growth becomes stunted, affecting fruit yield and quality.

Key Occurrence Stages

Monitoring should be intensified during vegetative growth, periods of high temperature and dry conditions, and whenever plants are under stress.

Control Measures

• Regularly inspect the undersides of middle-canopy leaves.
• Use a magnifying glass to identify active mites.
• Assess pest density based on leaf sampling results.
• Protect natural enemies such as predatory mites.
• Avoid unnecessary broad-spectrum insecticides that may disrupt natural pest control and contribute to mite outbreaks.
• When chemical control is necessary, select an appropriate acaricide based on the mite species and developmental stage.

Product Recommendation: Etoxazole 20% SC

Etoxazole belongs to IRAC Group 10B and acts as a mite growth inhibitor, affecting developmental processes in susceptible mites.

It primarily targets eggs and immature developmental stages. It should not be described as a product that provides rapid knockdown of adult mites.

SunAgro offers Etoxazole 20% SC miticide as a candidate for a professional acaricide portfolio.

Specific suitability for strawberries, target mite species, and application methods must be verified against the applicable product label.

Strawberry Aphids

Scientific name: Chaetosiphon fragaefolii

Strawberry aphids primarily congregate on young leaves, growing points, and leaf undersides. They feed on plant sap by piercing and sucking, which can interfere with normal plant growth.

Major damage:

• Curling and deformation of young leaves.

• Inhibited plant growth.

• Increased honeydew secretion.

• Leaf surfaces becoming contaminated by honeydew.

• Transmission of certain strawberry viruses by some aphid species.

Control Methods

1. Regularly inspect new leaves and growing points.

2. Identify aphid species promptly.

3. Protect ladybugs, aphid-feeding flies, and parasitic wasps.

4. Avoid excessive nitrogen fertilization.

5. Select targeted insecticides according to pest population density and crop requirements.

Product Recommendation: Flonicamid 50% WDG

Flonicamid belongs to IRAC Group 29 and primarily disrupts the normal feeding behavior of susceptible sucking pests.

It can rapidly suppress aphid feeding, although treated aphids may not immediately fall from the plants. Therefore, control performance should not be judged solely by whether aphids remain visible after treatment.

Flonicamid 50% WDG can be considered as a candidate insecticide for an aphid management portfolio. Before actual application on strawberries, verify that the specific product label lists strawberries and the target aphid species.

Thrips

Representative scientific name: Frankliniella occidentalis

Western flower thrips are important pests requiring close monitoring during strawberry flowering and early fruit development.

They primarily damage floral parts and young fruits, potentially causing browning, surface roughness, and reduced fruit marketability.

Main symptoms:

• Small, moving insects visible inside flowers.
• Brown damage on floral parts.
• Scratches and browning on the surface of young fruit.
• Deterioration in fruit appearance and quality.

Control Methods

• Regularly inspect the interior of flowers.
• Conduct monitoring using appropriate sampling trays.
• Focus monitoring on flowering and young fruit stages.
• Protect suitable predatory natural enemies.
• Select appropriate insecticides based on pest species and population levels.
• Give full consideration to pollinator safety when applying pesticides.

Lygus Bugs

Representative scientific name: Lygus spp.

Lygus bugs affect strawberry fruit development by feeding on floral parts and developing fruits.

Major damage:

• Uneven fruit development.
• Fruit deformities.
• Localized stunted growth in fruit.
• Reduced percentage of marketable fruit.

Control efforts should focus on field monitoring during flowering and fruit setting. Attention should also be given to weeds along field edges and other alternative host plants.

If chemical control is necessary, confirm the specific pest species, product target, and strawberry usage label. Do not select products based solely on the pest’s broad taxonomic category.

Spotted-Wing Drosophila

Scientific name: Drosophila suzukii

Spotted-wing drosophila is a pest that directly damages ripe and nearly ripe fruit.

Unlike many common fruit flies, female spotted-wing drosophila can use their serrated ovipositors to lay eggs in relatively intact fruit. The larvae then develop inside the fruit flesh.

Major damage:

• Larvae develop inside fruit.
• Fruit becomes soft.
• Premature fruit decay occurs.
• Spoilage accelerates during storage.
• Commercial value of fresh fruit declines.

Control Measures

• Establish appropriate monitoring and trapping programs.
• Increase harvesting frequency during fruit ripening.
• Promptly remove overripe and fallen fruit.
• Maintain field sanitation.
• Monitor for internal fruit pests.
• Select appropriate control measures based on actual pest pressure and approved product labels.

For spotted-wing drosophila, foliar spraying alone is insufficient because larvae primarily develop inside the fruit. Harvesting frequency and sanitation management are equally important.

Other Strawberry Pests

Pest	Main Damage	Key Management Measures
Cyclamen Mite	Deformed young leaves and stunted plant growth	Inspect seedlings and monitor the crown area
Root Weevils	Damage to roots and crowns	Root inspection and adult monitoring
Cutworms	Damage to seedlings and crowns	Seedling-stage surveys and field cleanup
Root-Knot Nematodes	Root knot formation and root damage	Soil testing and crop rotation
Whiteflies	Sap feeding and honeydew contamination	Monitor leaf undersides
Slugs and Snails	Feeding damage to leaves and fruit	Manage field humidity and remove hiding places

Major Strawberry Diseases and Integrated Pest Management

Strawberry diseases can affect roots, crowns, leaves, flowers, and fruit.

Environmental conditions and control methods vary by disease. It is therefore essential to distinguish between fungal, oomycete, and bacterial pathogens before selecting a management strategy.

Botrytis Gray Mold

Pathogen: Botrytis cinerea

Strawberry gray mold is one of the major diseases affecting marketable fruit yield. It can infect flowers and fruit and continue causing decay after harvest.

Main symptoms:

• Flowers turn brown and wither.
• Brown, soft rot lesions appear on fruit.
• Gray, fuzzy mold develops on infected fruit surfaces.
• Rotting areas gradually expand.
• Decay may continue during post-harvest storage.

Key Control Periods

The flowering period is a critical window for gray mold management. The pathogen may infect floral tissues during flowering, with visible symptoms appearing later during fruit development or ripening.

Integrated Management Strategies

1. Select healthy seedlings.
2. Remove wilted flowers and diseased fruit.
3. Maintain good airflow between plants.
4. Avoid unnecessary overhead irrigation.
5. Monitor prolonged rainy, foggy, and high-humidity conditions.
6. Apply protective fungicides according to infection risk, weather conditions, and approved product labels.
7. Rotate fungicide modes of action according to FRAC resistance management principles.

Product Recommendation: Pyraclostrobin 12.8% + Boscalid 25.2% WDG

This formulated product contains two active ingredients with different modes of action:

• Pyraclostrobin: FRAC Group 11, a QoI fungicide that inhibits fungal respiration at the Qo site of mitochondrial complex III.
• Boscalid: FRAC Group 7, an SDHI fungicide that inhibits succinate dehydrogenase in mitochondrial complex II.

The two active ingredients act at different sites in the fungal respiratory chain.

SunAgro offers Pyraclostrobin 12.8% + Boscalid 25.2% WDG fungicide, whose product information lists strawberries as a target crop and identifies diseases including Botrytis and powdery mildew.

It is important to recognize that Botrytis cinerea has developed resistance to fungicides in FRAC Groups 7 and 11 in some strawberry-growing regions.

Therefore, this combination should not be promoted as resistance-free or as a solution to all gray mold problems.

Application programs should be developed according to local pathogen susceptibility, product labels, and resistance management requirements.

Anthracnose

Representative pathogens: Colletotrichum spp., including the C. acutatum species complex.

Anthracnose can infect the crown, petioles, runners, and fruit of strawberry plants.

Major symptoms:

• Dark brown or black sunken lesions appear on fruit.
• Dark lesions develop on petioles and runners.
• Crown tissue turns brown.
• In severe cases, plants wilt or die.
• Fruit rot becomes more severe under humid conditions.

Key Stages of Occurrence

Attention is required during nursery production, transplanting, vegetative growth, and fruit development, especially when infected seedlings are introduced or when high temperature and humidity favor disease development.

Control Measures

• Purchase healthy seedlings.
• Inspect crowns and petioles.
• Remove infected plants and diseased fruit.
• Avoid prolonged leaf wetness.
• Improve field drainage.
• Apply appropriate protective fungicides according to disease risk and approved labels.

Product Recommendation: Captan 50% WP

Captan belongs to FRAC Group M04 and is a multisite, non-systemic, contact protective fungicide.

Its primary function is to form a protective layer on plant surfaces, reducing the likelihood of infection by susceptible fungal pathogens.

Captan 50% WP can be considered a candidate for a protective fungicide portfolio for fruits and vegetables.

Powdery Mildew

Pathogen: Podosphaera aphanis

Powdery mildew primarily affects strawberry leaves, petioles, floral parts, and fruit.

Main symptoms:

• White, powdery mycelium develops on the undersides of leaves.
• Leaf margins curl upward.
• Leaves develop purplish-red or brown discoloration.
• Photosynthetic activity is impaired.
• In severe cases, fruit surfaces may also become infected.

Unlike some other fungal leaf diseases, powdery mildew does not require large amounts of free moisture on leaf surfaces to develop. Suitable temperature, humidity, and canopy conditions can also promote disease progression.

Control Measures

• Regularly inspect the undersides of leaves.
• Maintain appropriate plant density.
• Avoid excessive nitrogen fertilization, which can encourage excessive vegetative growth.
• Promptly remove severely infected leaves.
• Select an appropriate fungicide according to disease development and the product label.
• Rotate FRAC Groups appropriately to reduce resistance selection pressure.

Phytophthora Crown and Root Rot

Representative pathogen: Phytophthora cactorum

Phytophthora belongs to the Oomycetes and should not be treated as an ordinary fungal pathogen.

It primarily affects the root system and crown.

Main symptoms:

• Plants gradually wilt.
• Roots turn brown and rot.
• Brown or chocolate-colored tissue develops inside the crown.
• Plant growth becomes significantly stunted.
• In severe cases, the entire plant dies.

Control Measures

1. Select healthy seedlings.
2. Avoid prolonged soil waterlogging.
3. Improve field drainage.
4. Use appropriate raised-bed planting systems.
5. Remove severely infected plants.
6. Select management methods based on accurate pathogen diagnosis.

General-purpose broad-spectrum fungicides should not be treated as universal solutions for Phytophthora diseases. Product selection must consider the pathogen’s biology and the specific label claims.

Red Stele Root Rot

Pathogen: Phytophthora fragariae

Red stele root rot primarily affects strawberry root systems and can cause significant plant decline under favorable conditions involving low temperatures, high soil moisture, and susceptible soil environments.

A characteristic symptom is red or reddish-brown discoloration of the central vascular tissue, which becomes visible when an infected root is cut lengthwise.

Management Priorities

• Use healthy planting material.
• Select planting sites with good drainage.
• Review the disease history of the soil.
• Implement appropriate crop rotation.
• Prevent pathogen spread through contaminated soil and infected planting material.

Red stele should be distinguished from root swelling caused by root-knot nematodes through root examination and appropriate pathogen diagnosis.

Biological Root-Zone Management

During seedling establishment and early root development, beneficial microorganisms can be incorporated into an integrated crop protection program.

Product Recommendation: Trichoderma harzianum 1 Billion CFU/g OD

Trichoderma harzianum is a beneficial fungus with potential value in biological disease management.

Its potential functions include:

• Root Colonization: Establishes within the root zone under suitable conditions.
• Competition: Competes with certain soil-borne microorganisms for nutrients and space.
• Antagonistic Activity: Antagonizes certain plant pathogens.
• Microbial Balance: Contributes to microbial balance in the root zone.
• Induced Resistance Support: May participate in plant defense responses under suitable conditions.

SunAgro offers Trichoderma harzianum 1 Billion CFU/g OD, formulated as an OD product with a specified viable microorganism count of 1 billion CFU/g.

This product can be considered a potential component of a root-zone biological management portfolio. However, it must not be marketed as a cure for established Phytophthora crown rot or red stele root rot.

When evaluating this product, consider viable propagule counts, storage conditions, soil environment, and compatibility with other pesticides.

Leaf Spot and Leaf Scorch

Common strawberry leaf diseases include:

Disease	Pathogen	Main Symptoms
Common Leaf Spot	Mycosphaerella fragariae	Round lesions develop on leaves
Leaf Scorch	Diplocarpon earlianum	Reddish-brown to purplish-brown lesions appear on leaves
Angular Leaf Spot	Xanthomonas fragariae	Angular, water-soaked lesions develop on leaves
Verticillium Wilt	Verticillium dahliae	Plant wilting and vascular discoloration
Fusarium Wilt	Fusarium oxysporum f. sp. fragariae	Leaf yellowing and plant decline

It is important to note that Angular Leaf Spot is a bacterial disease and should not be managed using the same approach as common fungal leaf spot diseases.

Management measures should include healthy planting material, removal of diseased plant debris, appropriate crop rotation, proper irrigation practices, and accurate pathogen diagnosis.

Post-Harvest Fruit Rot

Strawberries may develop several types of rot after harvest.

Disease	Representative Pathogen	Main Symptoms
Gray Mold	Botrytis cinerea	Gray, velvety mold
Rhizopus Soft Rot	Rhizopus stolonifer	Rapid fruit softening and decay
Mucor Rot	Mucor spp.	Fruit rot and mold growth
Anthracnose Fruit Rot	Colletotrichum spp.	Dark, sunken lesions

Post-harvest disease management cannot rely solely on field pesticide applications.

Harvest hygiene, removal of diseased fruit, rapid pre-cooling, clean packaging, and cold-chain stability are equally important.

Strawberry Weed Management

Weeds compete with strawberry plants for light, water, and nutrients. They may also serve as alternative hosts for pests and certain pathogens.

Because strawberry plants are relatively short and have shallow root systems, they are particularly susceptible to weed competition during early growth.

Major Weed Types

Weed Type	Common Species	Major Impacts
Annual Grasses	Crabgrass, Goosegrass, Foxtail	Compete with strawberries for water and nutrients
Broadleaf Weeds	Pigweed, Lambsquarters, Chickweed	Interfere with plant growth and field aeration
Perennial Grasses	Bermudagrass	Persistent competition and difficult control
Sedges	Yellow Nutsedge, Purple Nutsedge	Propagate through underground tubers and are difficult to manage
Other Weeds	Common Groundsel, Wild Mustard	Affect field sanitation and harvesting operations

Pre-Plant Weed Management

• Remove existing weeds before planting.
• Identify areas where perennial weeds are present.
• Implement appropriate stale seedbed management.
• Consider soil solarization where environmental conditions are suitable.
• Establish a relatively weed-free field before transplanting.

Weed Management During Vegetative Growth

• Use plastic mulch to reduce weeds on raised beds.
• Perform manual weeding in a timely manner.
• Use appropriate mechanical weeding between rows.
• Control weeds along field edges.
• Prevent weeds from flowering and setting seed.

Chemical Weed Control

Strawberries have high crop safety requirements for herbicides. Particular attention must be paid to the sensitivity of transplanted plants, leaves, runners, and developing fruit.

Herbicides must be selected according to the specific strawberry production system, weed species, application timing, and product label instructions.

A herbicide suitable for controlling a particular grass or broadleaf weed should not automatically be considered safe for strawberries.

Where clear evidence supporting a product’s suitability for strawberries is unavailable, priority should be given to plastic mulching, manual weeding, and appropriate mechanical management. Unconfirmed herbicide uses should not be recommended.

Strawberry Growth Regulation and Plant Management

Decisions regarding strawberry growth regulation must be based on cultivar characteristics, plant vigor, production systems, and management objectives.

Key management areas include:

• Vegetative Growth: Management of vegetative development.
• Runner Management: Control of runner production according to the cultivation system.
• Canopy Management: Maintaining suitable canopy density and airflow.
• Flowering: Management of flower buds and flowering development.
• Fruit Development: Maintaining balanced plant growth during fruit production.

Prohexadione-Calcium 10% WDG

Prohexadione-Calcium 10% WDG is a plant growth regulator (PGR) that influences vegetative growth by inhibiting specific steps in gibberellin biosynthesis.

Its product positioning primarily involves:

• Shoot Growth Control: Regulation of new shoot growth.
• Vegetative Growth Regulation: Management of excessive vegetative growth.
• Canopy Management: Supporting appropriate canopy development.
• Crop Structure Regulation: Managing plant structure according to production objectives.

Whether strawberries require a growth regulator depends on cultivar characteristics, plant vigor, growing conditions, and specific production objectives.

Prohexadione-Calcium should not be considered a routine or essential product for every strawberry production system. Actual application must follow the applicable product label and technical requirements for strawberries.

Strawberry Harvesting, Sorting, and Packing

Strawberry harvesting is a critical link between field production and market distribution.

Strawberries are soft, have high water content, and are highly susceptible to mechanical damage and rapid deterioration. Even when pests and diseases are effectively managed in the field, improper harvesting and packing can still result in significant commercial losses.

Determining Harvest Maturity

Harvest timing is generally determined by fruit color development, fruit size, firmness, and market requirements.

Key quality indicators:

• Color: Uniformity and degree of fruit coloration.
• Size: Fruit size and grading requirements.
• Shape: Uniformity and characteristic fruit shape.
• Firmness: Fruit firmness and handling tolerance.
• Soluble Solids: Soluble solids content.
• Freedom from Defects: Absence of obvious diseases and mechanical damage.

The fresh-market sector typically has higher requirements for fruit color, shape, and visual integrity, while processing applications may use different ripeness levels and grading standards.

Harvest Handling

During harvesting, the following practices should be observed:

1. Avoid bruising the fruit.
2. Minimize fruit drops from the plant into harvesting containers.
3. Use clean harvesting containers.
4. Promptly remove rotten and damaged fruit.
5. Avoid prolonged exposure to high temperatures after harvest.
6. Schedule harvesting frequency according to the production system.

For day-neutral varieties, maintain consistent personnel, containers, and sorting procedures during continuous harvesting.

Sorting and Packaging

Post-harvest sorting is typically required to meet market specifications.

Process	Main Objective
Size Grading	Classification by fruit size
Color Grading	Classification by ripeness and color
Defect Removal	Removal of rotten, damaged, and misshapen fruit
Quality Inspection	Inspection of fruit firmness and appearance
Clamshell Packaging	Packing in transparent clamshell containers
Batch Traceability	Maintaining batch identification and traceability

During packaging, avoid excessive compression while ensuring adequate ventilation.

Strawberry Pre-Cooling, Storage, Transportation, and Marketing

Post-harvest quality management directly affects strawberry shelf life and final market value.

Rapid Pre-Cooling

Field heat should be removed from strawberries as quickly as possible after harvest.

Forced-air cooling is one of the common pre-cooling methods used in commercial strawberry production.

Main objectives:

• Lower fruit temperature.
• Slow down respiration.
• Reduce moisture loss.
• Delay spoilage.
• Maintain fruit firmness and marketable appearance.

Cold Storage Management

Reference storage conditions for strawberries:

Parameter	Recommended Reference Values
Storage Temperature	0 ± 0.5°C
Relative Humidity	90–95%
Primary Objectives	Reduce water loss and delay spoilage
Key Risks	Temperature fluctuations, condensation, mechanical damage

Strawberries require a stable, low-temperature environment during storage.

Excessively low humidity accelerates water loss, while condensation inside packaging may increase the risk of spoilage. Temperature and humidity should therefore be managed together with packaging ventilation and cold-chain conditions.

Transportation Management

Key transportation priorities:

• Cold Chain Continuity: Maintain stable low-temperature conditions.
• Temperature Monitoring: Monitor temperature throughout transportation.
• Packaging Protection: Use suitable packaging to protect fruit.
• Ventilation: Maintain appropriate airflow.
• Mechanical Damage Prevention: Minimize vibration, impact, and excessive stacking pressure.
• Batch Traceability: Maintain accurate batch identification.

During long-distance transportation, avoid repeated temperature fluctuations and excessive stacking pressure.

Market Distribution and Quality Inspection

When entering wholesale, retail, and export markets, strawberries typically undergo the following quality inspections:

Inspection Item	Key Points
Appearance	Appearance and color uniformity
Fruit Size	Fruit size and grading consistency
Firmness	Fruit firmness
Decay Rate	Percentage of decayed fruit
Packaging Integrity	Packaging condition and protection
Residue Compliance	Pesticide residue requirements
Batch Traceability	Batch identification and traceability

Commercial strawberry quality depends not only on field crop protection but also on post-harvest handling and logistics management.

Incorporating these steps into the overall production plan is essential for minimizing losses from harvesting to final sale.

Post-Harvest Plant Renewal and Preparation for the Next Season

The end of harvesting does not mean that strawberry production management is completely finished.

Different production systems require different renewal measures.

Renewal for Perennial Runner Cultivation

For the Matted Row System, which is suitable for perennial management, the following post-harvest measures can be considered according to field conditions:

• Mowing: Appropriately trim old leaves.
• Row Narrowing: Control planting row width.
• Runner Management: Retain healthy daughter plants where appropriate.
• Weed Control: Remove competing weeds.
• Field Sanitation: Remove diseased plant debris.
• Irrigation Management: Restore appropriate irrigation practices.
• Nutrient Management: Apply nutrients according to plant requirements.

Field Cleanup for Annual Raised-Bed Plasticulture

For the Annual Plasticulture System, the following steps are typically taken after the final harvest:

• Remove plant debris.
• Remove plastic mulch that needs replacement.
• Clean up diseased and fallen fruit.
• Inspect the soil and root zone for problems.
• Record major pests and diseases from the current season.
• Plan the next planting cycle.

Renewal of Day-Neutral Strawberries

The Day-Neutral System typically requires continuous runner management to prevent excessive runner production from diverting resources away from fruit production.

The decision to retain plants for another season should be based on cultivar characteristics, plant health, production facilities, and expected yield.

After harvesting, review the following:

• Which diseases were most severe?
• Which pests require priority monitoring?
• Which fungicides or insecticides showed insufficient performance?
• Which fields require crop rotation or management adjustments?
• Which crop protection products should be prioritized for the next purchasing season?

Strawberry Pesticide Selection and Resistance Management

Strawberry pest and disease management should not rely solely on the quantity of products applied. Greater attention should be given to active ingredients, modes of action, application timing, and resistance management.

Modes of Action of Major Products

Active Ingredient	Product Type	Group	Primary Management Focus
Etoxazole	Acaricide	IRAC 10B	Eggs and immature stages of susceptible mites
Flonicamid	Insecticide	IRAC 29	Aphids and certain sucking pests
Pyraclostrobin	Fungicide	FRAC 11	QoI-sensitive fungal pathogens
Boscalid	Fungicide	FRAC 7	SDHI-sensitive fungal pathogens
Captan	Fungicide	FRAC M04	Multisite contact protection
Trichoderma harzianum	Biofungicide	Biological agent	Root zone microbial management
Prohexadione-Calcium	PGR	Plant Growth Regulator	Vegetative growth and canopy regulation

Why Should Modes of Action Be Rotated?

Long-term, continuous use of insecticides or fungicides with the same mode of action may increase resistance selection pressure.

Recommendations:

• Select different modes of action according to the target pest or pathogen.
• Follow the resistance management principles of IRAC and FRAC.
• Do not treat different trade names within the same group as genuine mode-of-action rotation.
• Monitor local resistance surveillance information where available.
• Combine cultural, biological, and chemical control methods.

It should be noted that although Pyraclostrobin + Boscalid is a combination product containing FRAC Groups 11 and 7, this does not eliminate resistance risks.

For strawberry gray mold in particular, resistance has been documented across multiple fungicide groups. Product selection and rotation should therefore be based on local resistance information and approved label requirements.

Pre-Harvest Pesticide Residue Management

Strawberries are characterized by continuous harvesting, so particular attention must be paid to:

• PHI: Pre-Harvest Interval.
• MRL: Maximum Residue Limit.
• REI: Restricted-Entry Interval.
• Application Records: Accurate pesticide application records.
• Seasonal Application Limits: Maximum seasonal application limits.

All pesticide application schedules should be aligned with harvesting dates and the applicable product label rather than relying solely on standard spraying intervals.

SunAgro Strawberry Crop Protection Product Selection Guidelines

Strawberry production requires the coordinated selection of different crop protection products according to pest pressure, disease risks, plant growth stages, and production systems.

SunAgro’s product portfolio can be evaluated around the following requirements:

Product Category	Representative Product Specifications	Primary Application Focus
Acaricides	Etoxazole 20% SC	Candidate for mite management
Insecticides	Flonicamid 50% WDG	Candidate for aphid management
Fungicides	Pyraclostrobin 12.8% + Boscalid 25.2% WDG	Product targeting strawberry fungal diseases
Protectant Fungicides	Captan 50% WP	Protective fungicide portfolio
Biofungicides	Trichoderma harzianum 1 Billion CFU/g OD	Root-zone biological management
Plant Growth Regulators	Prohexadione-Calcium 10% WDG	Growth regulation candidates

It is important to distinguish between a product’s technical specifications and its specific crop application label.

The products listed above do not imply that all have been confirmed as suitable for every strawberry production system or all target pests and diseases.

Actual procurement and application decisions should be based on verification of product specifications, formulation, labels, target organisms, crop suitability, and usage restrictions.

Frequently Asked Questions About Strawberry Crop Protection

What Are the Most Common Diseases in Strawberry Production?

Common strawberry diseases include Botrytis gray mold, anthracnose, powdery mildew, Phytophthora crown and root rot, red stele, and leaf spot.

The timing of disease development and appropriate management methods vary by pathogen. Control programs should be tailored according to pathogen diagnosis, environmental conditions, and crop growth stages.

When Should Gray Mold in Strawberries Be Controlled?

The flowering period is a critical window for gray mold management.

The pathogen may infect floral tissues during flowering, while visible rot symptoms may appear later during fruit development or ripening.

Monitoring should therefore be intensified before, during, and after flowering. Control measures should be scheduled according to weather conditions, field infection risks, and approved product labels.

Which Parts of the Strawberry Plant Are Primarily Affected by Anthracnose?

Anthracnose can affect the fruit, crown, petioles, and runners.

Fruit typically develops dark, sunken lesions, while crown infection can cause plant wilting and, in severe cases, plant death.

How Should Strawberry Spider Mites Be Controlled?

Regularly inspect the undersides of leaves to identify mite species and assess infestation severity.

Combine biological control methods, such as the use of predatory mites, with appropriate acaricides when necessary. Select products according to mite developmental stages and rotate active ingredients based on IRAC resistance management principles.

Can Flonicamid Be Used to Control Aphids on Strawberries?

Flonicamid is an insecticide primarily targeting aphids and belongs to IRAC Group 29.

However, whether a specific formulation can be used on strawberries must be verified against its product label, including the listed crop and target aphid species.

The general application characteristics of an active ingredient alone are not sufficient to confirm a specific product’s suitability for strawberries.

Why Do Strawberries Often Produce Deformed Fruit?

Possible causes include insufficient pollination, low temperatures during flowering, Lygus bug feeding, thrips damage, and other forms of floral injury.

The actual cause should be determined by evaluating flower development, fruit symptoms, and pest monitoring results. Not all deformed fruit should automatically be attributed to insect damage.

How Often Should Fungicides Generally Be Applied to Strawberries?

There is no single application interval suitable for all strawberry production systems.

Application timing should be determined by the risks of Botrytis, anthracnose, powdery mildew, local weather conditions, product label instructions, resistance management requirements, and harvesting schedules.

How Should Strawberries Be Stored After Harvest?

A commonly used reference storage condition for strawberries is approximately 0 ± 0.5°C with relative humidity of 90–95%.

Strawberries should be pre-cooled as soon as possible after harvesting. Temperature fluctuations should be minimized, packaging ventilation should be maintained, and mechanical damage should be avoided.

What Are the Primary Propagation Methods Used in Commercial Strawberry Cultivation?

Commercial strawberry production primarily uses plug plants, bare-root plants, and runner plants.

Most commercial production systems involve transplanting nursery-grown plants rather than direct seeding with ordinary strawberry seeds.

Can Biological Fungicides Completely Eliminate Strawberry Root Rot?

No.

Microbial products such as Trichoderma harzianum can serve as preventive tools within integrated root zone management programs.

However, they cannot replace healthy seedlings, drainage management, soil sanitation, crop rotation where appropriate, and pathogen-specific control measures.