AMAL. I. AFIFI, K.T. AWADALLAH, IMAN I. El-SEBAEY* AND M.F.S. TAWFIK
Biological Control Lab., Dept. of Econ. Entomology and Pesticides, Fac. Agric., Cairo University , Giza , Egypt
* Plant Protection Res. Inst., Agric. Res. Center , Giza , Egypt.

ABSTRACT

Coranus angulatus Stal., inhibits the host plant, Aihagi mouroum Med. At constant hygrothermal conditions of 30±1°C and 70% R.H., the male passed its nymphal stage through four instars, while the female passes this stage through five instars. Thus, the insect male passed the immature feeding stage in shorter period (42.4 days) than female (46.1 days). An average of 96±5.9 eggs per female was reported at a rate of 2 egg/female/day. The various stages of its life cycle (egg + five nymphal stages) were described. Measurements of head, antennal segments, rostrum, pronotum and body were considered. Mating and oviposition processes together with the egg laying activity were reported.

Key Words: Biology, Description, Coranus angulatus.