What is the best time to spray insecticide on rice?
Do not spray insecticide on rainy days; this is basic common sense that farmers understand. However, many farmers often spray at noon on sunny days, which is highly inadvisable and harmful, because: 1. At noon, the light is strong, and pests hide on the undersides of leaves and inside stems, so the insecticidal effect is poor; 2. Under high temperatures and strong light, the pesticide volatilizes and decomposes late...
Do not spray insecticide on rainy days; this is basic common sense that farmers understand. However, many farmers often spray at noon on sunny days, which is highly inadvisable and harmful, because: 1. At noon, the light is strong, and pests hide on the undersides of leaves and inside stems, so the insecticidal effect is poor; 2. Under high temperatures and strong light, the pesticide volatilizes and decomposes, so the control effect is poor; 3. The pesticide is very harmful to the human body. At this time, pesticide poisoning accidents are most likely to occur.
It is best to spray insecticide between 8:30-10:30 in the morning and 4:30-5:30 in the afternoon, because in the morning at this time the dew has already dried, the pesticide will not be diluted by dew and have its efficacy reduced, and the temperature is not high; this is when diurnal pests are most active, so the control effect is best. From 4:30-5:30 in the afternoon, the light gradually weakens, and this is when nocturnal pests begin to become active. At this time, spraying insecticide can effectively kill nocturnal pests.