Liriomyza sativae has become a major threat to vegetable production, spreading rapidly and causing significant damage. Effective and timely pesticide application is essential for managing this pest. This species affects both protected and open-field vegetables, including beans, cucumbers, loofah, tomatoes, eggplants, and more. Implementing timely chemical or biological control measures is a crucial part of an integrated pest management strategy.
In recent years, the use of biological pesticides has shown promising results in controlling Liriomyza sativae. Two highly effective options are 0.2% Avermectin emulsifiable concentrate and 25% Diflubenzuron suspension. These products have demonstrated insecticidal efficacy exceeding 95%, making them excellent choices for farmers seeking sustainable solutions.
Avermectin, the active ingredient in Avicel, is commonly known as “Qiqisu†in China. It is a natural antibiotic produced through microbial fermentation and works by disrupting nerve signals in pests, leading to their paralysis and death. On the other hand, Diflubenzuron belongs to the class of insect growth regulators. It inhibits chitin synthesis, preventing larvae from molting properly and ultimately causing their death.
When using Avicel and Diflubenzuron No. 3 for Liriomyza sativae control, there are three key advantages:
1. **High effectiveness with long residual activity**: When applied at recommended dilutions—such as 0.2% Avicel diluted 1500 times or 25% Diflubenzuron No. 3 diluted 1000 times—the control rate can exceed 95%, with effects lasting up to 20 days.
2. **Safe for beneficial insects and the environment**: These two agents have minimal impact on natural enemies, making them ideal for integrated pest management. They are also environmentally friendly, low-toxicity, and leave little residue, meeting the standards for producing "no-pollution" vegetables.
3. **Crop safety**: Even when applied multiple times at higher concentrations, these pesticides rarely cause phytotoxicity in most vegetable crops, ensuring safe and effective use.
For best results, spraying should be done during the larval stage of Liriomyza sativae, with applications every 7 days. Depending on infestation levels, 2 to 4 sprays may be required. The two agents can be used separately or alternated.
The China Pesticide Network advises users to be cautious when applying pesticides. To enhance the performance of the solution, it is recommended to add a pesticide synergist at a 1000-fold dilution. This improves the agent’s penetration, coverage, and adhesion, resulting in better and longer-lasting control. Always follow label instructions and take necessary safety precautions.
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