1. Choose Pesticides Suitable for Low Temperature Application
Generally, stomach poisons and contact insecticides are less affected by temperature, while systemic and fumigant pesticides are more sensitive to cold conditions. For example, if you use insecticides like organophosphates or pyrethroids in low temperatures, their effectiveness may significantly decrease. On the other hand, products such as sulfur-based mixtures or copper-based fungicides can still perform well even at lower temperatures. Additionally, some herbicides applied during colder days can have a longer residual effect compared to when used in hot weather. Therefore, after spraying, it's usually unnecessary to reapply, as long as the solution is properly distributed.
Second, choose a sunny and warm period for application
During late winter and early spring, pests tend to be more active due to higher feeding and respiration rates. This means that the pesticide sprayed on them is absorbed more effectively, leading to better control results. Applying pesticides during warmer parts of the day can enhance their performance and increase the likelihood of successful pest management.
Third, adjust the dosage appropriately
In summer, applying the standard recommended dosage often leads to effective pest control. However, during late spring and early spring, when temperatures are cooler, the effectiveness of pesticides may be reduced. In such cases, increasing the concentration slightly can help improve results, but it should not exceed 50% of the normal dosage. Always check the label instructions and test on a small area first to avoid damage.
Fourth, prioritize soil-applied pesticides
Pesticides like Bordeaux mixture and sulfur-based products are cost-effective and efficient for controlling pests and diseases in the soil. However, it's important to be cautious about phytotoxicity, especially when using these products on sensitive crops. Always follow the manufacturer’s guidelines and consider environmental conditions before application.
Fifth, pay attention to the safety interval of pesticides
During winter and early spring, the breakdown of pesticides slows down, which means they can remain in crops for a longer time. This increases the risk of residue accumulation, so it's crucial to extend the safety interval between pesticide application and harvest. This helps ensure that the produce is safe for consumption and protects human health. Always read and follow the safety instructions provided on the pesticide label.
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