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BACHATLY, M., SEDRAK, R. (1997). ESTIMATION OF PREDATOR POPULATIONS IN A SQUASH FIELD UNDER CHEMICAL SPRAYING CONDITIONS AGAINST APHID INFESTATION. Egyptian Journal of Agricultural Research, 75(1), 83-95. doi: 10.21608/ejar.1997.403141
MAGDA A. BACHATLY; RAGAA A. SEDRAK. "ESTIMATION OF PREDATOR POPULATIONS IN A SQUASH FIELD UNDER CHEMICAL SPRAYING CONDITIONS AGAINST APHID INFESTATION". Egyptian Journal of Agricultural Research, 75, 1, 1997, 83-95. doi: 10.21608/ejar.1997.403141
BACHATLY, M., SEDRAK, R. (1997). 'ESTIMATION OF PREDATOR POPULATIONS IN A SQUASH FIELD UNDER CHEMICAL SPRAYING CONDITIONS AGAINST APHID INFESTATION', Egyptian Journal of Agricultural Research, 75(1), pp. 83-95. doi: 10.21608/ejar.1997.403141
BACHATLY, M., SEDRAK, R. ESTIMATION OF PREDATOR POPULATIONS IN A SQUASH FIELD UNDER CHEMICAL SPRAYING CONDITIONS AGAINST APHID INFESTATION. Egyptian Journal of Agricultural Research, 1997; 75(1): 83-95. doi: 10.21608/ejar.1997.403141

ESTIMATION OF PREDATOR POPULATIONS IN A SQUASH FIELD UNDER CHEMICAL SPRAYING CONDITIONS AGAINST APHID INFESTATION

Article 9, Volume 75, Issue 1, March 1997, Page 83-95  XML PDF (3.47 MB)
Document Type: Original Article
DOI: 10.21608/ejar.1997.403141
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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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