THREE IGRS ON DEVELOPMENT TIME, MORTALITY AND REPRODUCTION OF APHIS GOSSYPII GLOVER (APHIDIDAE: HEMIPTERA)

Document Type : Original Article

Authors

Plant Protection Research Institute, Agricultural Research Centre, Dokki, Giza, Egypt.

Abstract

The effect of three IGR compounds flufenoxuron, PH 70-23 and chlorfluazuron was tested against Aphis gossypii Glover in the laborato­ry. Aphids fed on cotton leaves dipped into solutions of the three IGR compounds at the concentration 25 ppm showed a prolongation of the nymphal stage of the different instars. Reduction in the number of pro­duced nymphs and significant higher mortality than the control were ob­served. A number of individuals did not reach the adult stage or did not produce offspring. The three IGR compounds were less effective if aph­ids were transferred 24 or 48h after dipping. At 50 and 100 ppm con­centrations of the three IGR compounds, individuals did not moult or pro­duce offspring within 72 h, and mortality was significantly higher than the control for adults, first and second instars.