Laboratory evaluation of insecticides against larvae of pasture scarabs

Abstract

Twelve insecticides, incorporated into a limited soil habitat, were tested for kills of final instar larvae of Othnionius batesiii Oll., Sericesthis vigilana Sharp and Rhopaea magnicornis Blkb. "Dursban" at 1 and 5 p.p.m. and diazinon and parathion at 5 p.p.m. gave high mortalities of O. batesii. A wider range of chemicals, including lindane, diazinon and aldrin each at 1 p.p.m., gave high mortalities of S. vigilana but very high dosages were required for equivalent kills of R. magnicornis.