A composition comprising a pesticide (A) selected from avermectin and a photo-protecting agent wherin the mean diameter of the pesticide (A) particles is from 0.1 to 100μm and where the amount of photo-protecting agent in the composition does not exceed 20% of the total weight of the pesticide (A) particles plus the agent, and its use in agriculture.本發明關於一種包含選自阿佛菌素(avermectin)之殺蟲劑(A)及光保護劑的組成物，其中殺蟲劑(A)粒子的平均直徑係從0.1至100微米且其中在組成物中的光保護劑之量不超過20%之殺蟲劑(A)粒子加上該劑之總重量，並關於該組成物在農業中的用途。
