Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Comparative consumption rates for selected insect predators of two defoliating caterpillar species of soybean in Louisiana.

Abstract

Laboratory studies were carried out in Louisiana on the relative consumption rates of 7 foliage-inhabiting and 3 ground-inhabiting species of predators for immature examples of the soyabean pests Pseudoplusia includens and Heliothis zea in selected stages. Of the foliage-inhabiting species, Lebia analis and Calleida decora had the highest consumption rates, 25.4 and 23.0 1st-instar larvae of P. includens/24 h, respectively. The ground-inhabiting species Calosoma alternans sayi [C. sayi] consumed the greatest number of late-instar larvae, 16.0 fifth- and 10.0 sixth-instar larvae of P. includens/24 h. Field observations confirmed the laboratory data.