The degradative rate of fenvalerate in water was relative with the pH and the illuminative intensity,which degraded rapidly in alkaline solution and slowly in acidity and neutral solution.

• 氰戊菊脂在水中的降解速度与酸碱度和光照强度有关,在碱性溶液中降解快,酸性及中性溶液中降解较慢,在蒸馏水中的光解速度,直射太阳光比散射光快。