It is forbidden to use pesticides when it rains in Mao Mao. When it rains in Mao Mao, there will definitely be dew on the leaves of crops. If you use pesticides on the leaves of crops, they will flow into the ground with the dew on the leaves. If the sky in Mao Mao is still raining, there will be no pesticides at all, so when you use pesticides on crops, you must use pesticides in the rainy weather.