The pick-up and penetration of ultra-low-volume and emulsifiable concentrate malathion formulations by tobacco budworm larvae
Awad, T.M.; Vinson, S.B.
J. econ. Ent 61(1): 242-245
In investigations in Mississippi, third-instar larvae of Heliothis virescens (F.) were placed in jars with cotton leaves to which droplets of undiluted technical (95%) malathion (as used in ultra-low-volume spraying) were applied, and others were exposed similarly to leaves smeared with an emulsion prepared by diluting a 57% emulsion concentrate 1: 4 with water at approximately the same rate of actual toxicant per sq. in.