Biology of Sumatran Xystrocera globosa, a stem boring cerambycid pest of leguminous trees, was studied by laboratory breeding. The larvae were fed an artificial diet and kept either singly or in groups. Pattems of development and survivorship in immatures and survivorship and fertilily in adults were described quantitatively. The larvae established better in group rearing than in isolation, but showed cannibalism in groups from the 2nd instar onwards. Semelparous nature in reproduction was noted.Key Words: Xystrocera globosa / Cerambycidae / life cycle / artificial diet / cannibalism / fertility schedule To compensate destruction and degradation of the natural forests and to establish productive industrial forests, artificial reforestation has been spreading extensively in the.tropical regions for these 10 years or so. These newly planted forests are now facing problems of successively emerging insect pests, whereas biology of most of these insects are poorly known (e.g
Size disribution of head capsule width in the larvae of the banana skippet Erionota thrax was examined. Duration from the egg to emergence was u10.7 days in the field cages and 40.9 days under laboratory conditions. Survival rates during preimaginal stages of E. thrax were measured in the field cages.
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