THREE IGRS ON DEVELOPMENT TIME, MORTALITY AND REPRODUCTION OF APHIS GOSSYPII GLOVER (APHIDIDAE: HEMIPTERA) | ||
| Egyptian Journal of Agricultural Research | ||
| Article 34, Volume 73, Issue 4, December 1995, Pages 981-991 PDF (2.94 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejar.1995.442887 | ||
| Authors | ||
| MGDA M. BACHATLY; NABEL G. ISKANDER; RAGAA A. SEDRAK | ||
| 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. | ||
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