During the rainy season, crop pests and diseases tend to be more prevalent. When applying pesticides during this period, it's important to take certain precautions. Here’s a detailed guide from **Chinese Pesticide Xiaobian**:
First, focus on using highly systemic pesticides such as dimethoate, omethoate, monocrotophos, methamidophos, phosphorus compounds, insecticidal miticides, sedum, indigo, carbendazim, triadimefon, ethyl aluminum phosphate, tricyclazole, and others. These types of pesticides are absorbed by the plant's stems and leaves and then quickly distributed throughout the plant, making them less affected by rain. Additionally, some pesticides like 1605, methyl 1605, trichlorfon, carbofuran, quetiapine, chlorfenapyr, fenvalerate, green lactate, dexamethasone, and others may not have systemic properties but have strong penetration and resistance to wash-off, making them suitable for use in rainy conditions.
According to the **Pesticide Network**, when foliar sprays are applied, they can begin to move systemically within 2 hours. Phosphonamide-based products can enter the plant tissue rapidly, with about 50% of the dose entering the plant within an hour. Copper sprays and tricyclic azole sprays show no significant reduction in efficacy even after 30 minutes and 1 hour, respectively.
Another key point is to use fast-acting pesticides with strong knockdown effects, such as phoxim, dichlorvos, omethoate, imidacloprid, speed, mixed Weiwei, methomyl, Guangkewei, Xinweiwei, cotton boll, extinguishing Lingling, Xinguang No. 1, and pyrethroid-based pesticides. These can act quickly to control pests and diseases, reducing the risk of the pesticide being washed away by rain.
Finally, consider adding adhesives to your pesticide mixtures to improve their adherence to plant surfaces. Common adhesives include soy flour, polyvinyl alcohol, and leather glue, which help increase the effectiveness of pest control by ensuring better coverage and longer-lasting protection.
By following these guidelines, farmers can optimize pesticide use during the rainy season and maintain effective crop protection despite challenging weather conditions.
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