Some Effects of Age, Preimaginal Habitat, and Adult Food on Susceptibility of Boll Weevil to Certain Insecticides

Publisher Website
Google Scholar
Abstract
Experiments were conducted to determine the toxicity of Guthion®(O,O-dimethyl S-( 4-oxo-1,2,3-benzotriazin-3-(4H)- ylmethyl) phosphorodithioate), BHC, and toxaphene to the boll weevil under certain conditions of preimaginal habitat, adult food source, and weevil age. There was a 48- and 61-fold difference in the LD-50 of BHC and toxaphene, respectively, between the easiest to kill group (square-reared, bloom-fed, 2-day-old) and the hardest to kill group of weevils (boll-reared, boll-fed, 9-day-old). The LD-50 values were relatively constant in all tests using Guthion. The susceptibility of boll weevils to BHC and toxaphene was influenced to a greater extent by the adult food source than the age of the weevil or its preimaginal habitat. Based on LD-50 values, the order of susceptibility of the boll weevil to BHC and toxaphene was: boll-reared <square-reared, square-fed <bloom-fed, boll-fed<square-fed, and 9-day-old<2- day-old weevils.

This publication has 3 references indexed in Scilit: