Influence of some pesticides on mortality and fecundity of the aphidophagous coccinellid Adalia bipunctata L. (Col., Coccinellidae)

The influence of 30 pesticides (insecticides, acaricides and fungicides) on different stages of Adalia bipunctata was evaluated under laboratory condi tions by: (1)immersing individuals for 5 s in the pesticide solution; (2) p lacing the second and fourth instar larvae on leaves picked From trees trea ted with the pesticide; and (3) feeding adult coccinellids with aphids cont aminated by a recommended concentration of the pesticide. Fenpropathrin, al phacypermethrin, esfenvalerate. acrinathrin, phosalone and propoxur + metho xychlor caused high mortality (up to 100%) not only by direct contact but a lso as fresh residues on leaves, or even 28 days after application. The mor tality also varied with stage and mode of treatment. Feeding with aphids co ntaminated by fenpropathrin. clofentezine, hexythiazox, brompropylate and v inclozolin decreased the coccinellid fecundity.