Abstracts

 
INFLUENCE OF TEMPERATURE ON THE DEVELOPMENT OF THE COMMON GREEN LACEWING, CHRYSOPERLA CARNEA STEPHENS (NEUROPTERA: CHRYSOPIDAE)
F.A. ABDEL-GALIL, Y.A. DARWISH, A.M.K. EL-SAYED AND G.H. ABU-EL-HAGAG
Plant Protection Dept., Fac. of Agric. Assiut University, Assiut, Egypt
 

ABSTRACT

Threshold of development and the thermal units (day-degrees) required for the development of the egg, larval and pupal stages of the common green lacewing, Chrysoperla carnea Stephens reared on Aphis gossypii Glover at constant temperatures ranged from 18 to 34 ‘C were determined. Temperature thresholds of 6.5, 7.0 and 13.13 ‘C were assessed for the egg, larval and pupal stages, respectively. About 79, 206 and 114 day-degrees, were needed for egg, larval and pupal development, respectively. A total of 390 thermal units was required for a predator, generation.

 
Key Words: Chrysoperla carnea, Developmental threshold, Temperature, Biological control.