reduction of biodiversity是什么意思

用法例句

Application of 500～600 multiple KKY gave some effects to rate of letdown in individual number in phytophagous arthropod subcommunity within three to twenty days.

植物源复合杀虫剂KKY500～600倍液在喷施后3～20d内植食类节肢动物亚群落个体数减退率高;KKY各处理浓度均对捕食类天敌昆虫等亚群落和蜘蛛类天敌亚群落杀伤力低,是一种较为理想的植物源复合杀虫剂。