Bassidor®

Biological Control of Whitefly and
Two-Spotted Spider Mites

Developed from a unique strain of Beauveria bassiana, this biological insecticide provides effective control of whitefly and two-spotted spider mites in a wide range of crops. Packaged as a convenient wettable powder, it integrates seamlessly into standard application systems, offering both conventional and organic growers a powerful tool for managing these economically important pests. Compatible with many common agricultural products and suitable for tank mixing, it can help reduce additional application passes while supporting Integrated Pest Management (IPM) programs. With a low pre-harvest interval and minimal impact on beneficial insects, it offers a flexible and sustainable approach to pest management.

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Product Facts

Against
Whitefly and Two-Spotted Spider Mite

Active Ingredient
Beauveria bassiana strain R444

Formulation Type
Wettable Powder

Concentration
1 × 10¹² CFU/g

Standard Dosage
300 – 1000 g/ha

Crops
Wide range of crops

Shelf Life
24 Months

Pack Size
1 kg

SDS
Label

Tech
Sheet

Product
Label

Key Product Benefits

IPM Compatible

Supports integrated pest management strategies and resistance management programs.

Protects Beneficial Insects

Provides targeted control while preserving beneficial insect populations.

Tank Mix Flexibility

Compatible with many common agricultural products and suitable for tank mixing.

Low Residue Solution

Can be applied right up to harvest with a 0-day pre-harvest interval.

Reduced Field Passes

Tank mix compatibility can reduce additional spray applications.

Biological Mode of Action

Utilises a naturally occurring insect-pathogenic fungus to infect and control pests.

Target Pest Information

Whitefly

(Bemisia tabaci)

Whiteflies are sap-feeding insects that weaken plants by removing nutrients and producing honeydew, which promotes sooty mould growth. Heavy infestations can reduce crop quality, stunt growth and transmit plant diseases. Whiteflies are a major pest in greenhouse vegetable, ornamental and cannabis production.

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Two-Spotted Spider Mite

(Tetranychus urticae)

Two-spotted spider mites feed on plant cells, causing stippling, yellowing and reduced photosynthetic activity. Severe infestations can lead to leaf drop, plant stress and reduced yields. Their rapid reproduction makes early intervention critical for successful management.

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Application Guidelines

These guidelines are intended as general recommendations. Always read and follow the product label. For crop-specific advice, consult your local Andermatt representative.

Quantity

300 - 1000 g/ha

Frequency

Every 3 - 7 days, depending on pest pressure and crop conditions

Best Time to Apply

Late afternoon or during periods of high humidity and low UV exposure

Application Method

Full cover spray with thorough coverage of pest hotspots, including leaf undersides and leaf folds

Tank Mix / Adjuvants

Compatible with many common agricultural products. Ensure tank mix pH remains between 4 and 8. Avoid fungicide applications for at least 3 days before and after treatment

Pre-Harvest / Residues

0-day pre-harvest interval. Can be applied up to and including the day of harvest

Disclaimer

Performance information for Bassidor® is based on internal trials, field observations, and/or publicly available data. Results may vary depending on local crop management, soil type, and weather conditions. Always read and follow label directions.

© 2026 Andermatt Group. Bassidor® is a registered trademark of Andermatt Group.