PROBLEM TO BE SOLVED: To establish uniformly dispersible granular agrochemical preparation, premised on local spraying, having good dispersibility of a agrochemical active ingredient and capable of obtaining desired agrochemical treating effect even when algae, etc., are blown together and water surface of paddy field, etc., is covered by algae, etc., and a method for spraying the preparation.SOLUTION: This uniformly dispersible granular agrochemical preparation comprises an agrochemical active ingredient and has a particle size distribution in which particles having &ge3 mm particle diameter occupy 80% and property floating on water surface and disintegrates on the water surface within 30 min. This method for spraying uniformly dispersible granular agrochemical preparation comprises spraying the preparation over an area of 5% to 50% based on total paddy field area at distance separated by &ge1 m from levee of paddy field under flooding.COPYRIGHT: (C)2002,JPO【課題】 例えば藻類等が吹き寄せられ、水田等の水面を覆う状態となっていても、農薬活性成分の拡散性が良好であり、所期の農薬処理効果が得られる局所的な散布を前提とした均一拡散性粒状農薬製剤及びその製剤の散布方法を確立すること。【解決手段】 農薬活性成分を含有し、粒径3mm以上のものが80%である粒度分布と水面に浮遊する性質を有し、かつ30分以内に水面で崩壊する均一拡散性粒状農薬製剤および当該製剤を、湛水下の水田の畦畔から1m以上の距離に、全水田面積の5%~50%の面積にばら撒いて散布する均一拡散性粒状農薬製剤の散布方法。
