ECOLOGICAL STUDIES ON CEREAL APHID SCHIZAPHIS GRAMINUM (RONDANI) ON WHEAT PLANTS AND ASSOCIATED NATURAL ENEMIES IN FAYOUM GOVERNORATE | ||||
| Fayoum Journal of Agricultural Research and Development | ||||
| Article 3, Volume 19, Issue 1, January 2005, Page 17-23 PDF (419.88 K) | ||||
| Document Type: Research articles. | ||||
| DOI: 10.21608/fjard.2005.197775 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| Narmen A. Youssef; Seham S. El-Gendi | ||||
| Dept. of Plant Protect., Faculty of Agriculture, Cairo University, Fayoum Branch. | ||||
| Abstract | ||||
| S. graminum (Rondani) activity on wheat at Fayoum Governorate was evident from the 1st week of Feb. to mid May with two peaks. The first peak of infestation occurred at the early of April, with 90 and 49 aphids/10 plants during 2000/2001 and 2001/2002 seasons, respectively. Also, five species of predators and three species of parasitoids were recorded in association with this aphid. C.undecimpunctata and C.carnea were the dominant predators during the activity period from mid Mar. to mid April. On the other hand the parasitoids, Aphidius sp. was the most common species, followed by Aphelinus sp. and Diaeretiella rapae. The major weather factors (max. temp., min. temp. and RH.) showed insignificant effect on population of aphid , predators and parasitoids. | ||||
| Keywords | ||||
| Wheat; Aphid; Natural enemies | ||||
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