The Synergism of Alkaloids from Sophora alopecuroids to Four Insecticides

The synergism of 7 alkaloids from a leguminous plant ,Sophora alopecuroids, to four insecticides which belong to organophosphorus compounds,carbamate insecticides and natural chemicals.The results showed that the synergic ratio of seven alkaloids to phoxim was the range of 0.82~1.96 folds,1.10~2.15 folds to profenofos,1.23~1.84 folds to methomyl and 1.63~5.42 folds (72 h), 0.96~2.96 folds(96 h) to abamectin respectively. The synergic mechanisms of the alkaloids to insecticides were discussed.