ESTIMATION OF PREDATOR POPULATIONS IN A SQUASH FIELD UNDER CHEMICAL SPRAYING CONDITIONS AGAINST APHID INFESTATION | ||
| Egyptian Journal of Agricultural Research | ||
| Article 9, Volume 75, Issue 1, March 1997, Pages 83-95 PDF (3.47 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejar.1997.403141 | ||
| Authors | ||
| MAGDA A. BACHATLY; RAGAA A. SEDRAK | ||
| Plant Protection Research Institute, Agricultural Research Centre, Dokki, Egypt | ||
| Abstract | ||
| In a field experiment carried out in 1993 and 1994 seasons for evaluating the abundance of predators under chemical spraying applied on Nili squash. The most harmful insecticide was Malathion which reduced total numbers of aphidophagous nymphs and larvae during spraying (3.27 individuals/leaf vs 9.03/leaf for the control and 2.05 individuals/leaf vs 15.96 individuals/leaf for the control during 1993 and 1994 seasons, respectively). Supermisrona (mineral oil) was the safer compound and Sumicidin (fenvalerate) was intermediately affecting predator. community. In a laboratory test, the mortality percentage of Euseius scutalis and Phaenobrimia aphidivora treated by Supermisrona were 18.75 and 13.62%, respectively, with insignificant differences from the control. | ||
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