G. it. Ent., 5 (28): 301-304
August 31, 1991
Effect of thiourea, through topical application, on the adaptability by
Callosobruchus chinensis (L.)
(Coleoptera: Bruchidae)
to its own population density
by
S. K. PANDEY & R. K. PANDEY
Abstract - The reproductive and physiological effects of the chemosterilant thiourea were observed on Callosobruchus chinensis (L.) under the conditions of 28±2°C temperature, 75 per cent relative humidity and 16h photoperiod. The thiourea effects on the insect adaptability to its own populations density were noted when only females were exposed through topical application to the different doses of thiourea. With a dose of 3.5 ηg and a population density of 0.05 a maximum reproduction control (88.37%) was observed. The curve obtained was concave by nature, due to the adaptation to particular densities. At both lower and higher densities the percentage of reproduction control resulted higher.
