BIOLOGICAL CONTROL OF APHIS CROCCIVORA KOCH ON PHASEOLUS VULGARIS L. PLANTS AT FAYOUM GOVERNORATE | ||||
| Fayoum Journal of Agricultural Research and Development | ||||
| Article 11, Volume 26, Issue 2, July 2012, Page 130-136 PDF (314.79 K) | ||||
| Document Type: Research articles. | ||||
| DOI: 10.21608/fjard.2012.195009 | ||||
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| Author | ||||
| H.M. ABD EL-WARETH | ||||
| Plant Protection Research Institute, A.R.C., Giza, Egypt | ||||
| Abstract | ||||
| A study was carried out to estimate population density of cowpea aphid, Aphis craccivrora Koch and its predators associated bean plants. Population fluctuation of A. craccivrora and its three predators, i.e., Coccinella undecimpunctata L., Chrysoperla carnea Steph and Syrphus corollae F. were studied and released on bean which surrounded by cabbage plants as compared with other fields unsurrounded at Sennoris district, Fayoum Governorate during summer plantation 2011/2012. The obtained results showed that the population density of three predators at bean fields surrounding by cabbage more than twice (<100%) neighboring ones by mean counts by mean counts were 101.8 and 42.3 predators /20 plants, respectively. Statistical analysis showed highly significant differences between the tested field and the neighboring ones. The obtained results indicated that there was reduction in aphid population ranged between 9.53 to 75.20 by mean 47.79% concerning the number of the predators. Results also revealed that there were highly significant increase in bean green yield over neighboring check field (control) of about 70.0 % in bean plots inter-cropped with cabbage plants . | ||||
| Keywords | ||||
| Population density; Aphis craccivrora; bean; predators; Coccinella undecimpunctata; Chrysoperla carnea and Syrphus corollae; released; surrounded; un-surrounded; cabbage; summer plantation; green yield; inter-cropped | ||||
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