The present invention, (a) intensity at 340nm the xenon light of the cut-off 290nm 0.68W / m 2 in the irradiated 8 hours the pesticidal active ingredient remaining ratio is less than 50% after, (b) a hydrophobic organic solvent, (c) a water-soluble polymer dispersant, and (d) water It contains a weight ratio of agrochemical active ingredients and the hydrophobic droplet formed by suspended or dissolved in an aqueous organic solvent is being emulsified in water continuous phase, and agrochemical active ingredient and the hydrophobic organic solvent There 5: 95-70: relates to an aqueous emulsion pesticidal composition is 30. The pesticidal composition of the present invention, it is possible to suppress light degradation of the pesticidally active ingredient.本発明は、(a)カットオフ290nmのキセノン光を340nmにおける強度0.68W/m2で8時間照射した後の残存率が50%未満である農薬活性成分、(b)疎水性有機溶媒、(c)水溶性高分子分散剤、及び(d)水を含有し、該農薬活性成分が該疎水性有機溶媒に懸濁または溶解されてなる液滴が水連続相に乳濁されてなり、且つ該農薬活性成分と該疎水性有機溶媒との重量比が5:95~70:30である水性乳濁状農薬組成物に関する。本発明の農薬組成物によって、農薬活性成分の光分解を抑制することができる。
