When it comes to using microbial-based biopesticides, it's essential to understand their characteristics and proper application methods in order to maximize their effectiveness. The Pesticide Network Xiaobian introduces you to the most commonly used microbial sources of biopesticides and their key features:
1. Avermectin: Available in various formulations such as 0.2%, 0.5%, 0.6%, 0.9%, 1%, 1.8%, 2% emulsifiable concentrate, and 0.1%, 0.5% wettable powder. For example, when using 1.8% emulsifiable concentrate, mix 20–25 ml per acre with water. This formulation is effective against pests like spider mites, aphids, cabbage caterpillars, and diamondback moths. Always wear protective gear during application, avoid inhalation and skin contact, and ensure that the pesticide does not contaminate water sources or ponds.
2. LiuYangmycin: Typically available as a 10% emulsifiable concentrate. It is usually diluted between 1,000 to 2,000 times before spraying. It shows strong contact killing effects on pests such as Lepidoptera, Coleoptera, Homoptera, and Liriomyza, as well as spider mites. It also has some inhibitory effect on eggs. It is low in toxicity to humans and animals, safe for plants, and does not harm natural enemies.
3. Antibiotics (Agricultural Anti-120): Available in 2% and 4% aqueous solutions. Apply 300–500 ml per acre every 15–20 days through foliar spraying to prevent powdery mildew. Note: Do not mix with alkaline pesticides. Store in a dry and cool place.
4. Jinggangmycin: Comes in 3%, 5%, and 20% wettable powder, as well as 3%, 5%, 10%, and 20% aqueous agents. For instance, when using the 5% aqueous agent, apply 100–130 ml per acre through foliar spray to control sheath blight and similar diseases.
5. Streptomycin: Available as 10%, 24%, 68%, and 72% wettable powder of agricultural streptomycin sulfate. Using 72% wettable powder, apply 15–20 g per acre through foliar spray to manage soft rot effectively.
6. Mushroom Proteoglycan: Available as a 0.5% aqueous solution (Viral Ning). Use 165–200 ml per acre, spraying directly onto the plant surface to help prevent viral diseases.
7. Oxytetracycline Hydrochloride: Available as an 88% wettable powder. Mix 35–50 g per acre and spray on the leaves of water plants to prevent soft rot.
8. Wuyincin: Available as a 1% aqueous agent of agricultural Wuyimycin. Recommended by China’s Pesticide Network, use 500–750 ml per acre, spraying directly on the leaf surface. It has shown excellent results in controlling powdery mildew.
By understanding these microbial-based biopesticides and following the correct application procedures, farmers can enhance crop protection while minimizing environmental impact. Always read the label carefully and follow safety guidelines to ensure both efficacy and sustainability in pest management.
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