EFFECT OF AN INSECT GROWTH INHIBITOR ON THE NEWLY HATCHED LARVAE OF PECTINOPHORA GOSSYPIELLA (SAUND.); CYANOX RESISTANT AND SUSCEPTIBLE STRAINS | ||||
| Egyptian Journal of Agricultural Research | ||||
| Article 4, Volume 77, Issue 4, December 1999, Page 1477-1484 PDF (1.8 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejar.1999.342089 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| SAMER N. KOSTANDY; MONA F. ROFAIL; SUZAN H. TAHER; ALIA ABDEL-HAFEZ | ||||
| Plant Protection Research Institute, Agricultural Research Centre, Giza, Egypt | ||||
| Abstract | ||||
| Laboratory experiments were conducted using the growth inhibitor, CGA- 72662 against the newly hatched larvae of the pink bollworm Pectinophora gossypiella (Saund.) to evaluate its biological activity and latent effect on this pest. Data revealed that LC5o values were 176.2 and 1046.44 ppm for susceptible and cyanox resistant strains, respectively. Treating the newly hatched larvae of the two strains with LC25 concentrations of the compound (10.86 and 247.13 ppm)resulted in a significant reduction of the pupal weight, number of deposited eggs/ female and eggs hatchability. Reduction in pupal weight was more evident in case of susceptible strain (32,51%) than the resistant one (7.8%). Compared to control , reduction in the mean number of deposited eggs reached 54.9 and 43.95% for cyanox resistant and susceptible strains, respectively. However, reduction of egg hatchability was about 27% for the two strains. The compound could be fairly considered potent against the larvae of the pink bollworm. | ||||
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