DPC and PP333 had different effect on damage of cotton bellworm, but the damage of younger instar larva was reduce by spring DCP and PP333.

• 室内外试验中缩节胺、多效唑对棉铃虫危害的影响存在差异，但喷施后都使棉铃虫低龄幼虫的危害减轻。