Survey of Entomopathogenic Fungi and Parasitoids on Two Aphid Species on Wheat Crop in Gharbia Governorate, Egypt | ||||
| Journal of Plant Protection and Pathology | ||||
| Article 16, Volume 9, Issue 2, February 2018, Page 153-158 PDF (257.81 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jppp.2018.41282 | ||||
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| Authors | ||||
| I. A. El-Shami1; M. F. El-Sheikh2 | ||||
| 1Plant Protection Research Institute, Agriculture Research Center | ||||
| 2Department of Plant Protection, Faculty of Agriculture, Tanta University, Egypt | ||||
| Abstract | ||||
| The present work was carried out during two successive wheat growing seasons, being 2015/16 and 2016/17 in three locations, Gharbia governorate to survey the cereal aphids and their natural enemies. Two cereal aphids were found: Rhopalosiphum padi (L.) occurred from December to April and Sitobion avenae (F.) was found during March and April. Two entomopathogenic fungi were isolated from the two cereal aphids. The fungus, Lecanicillium lecanii isolated from R. padi and the seasonal fungal incidence percentage were 4.35±0.43 and 7.28±2.1% in the two seasons. Also, the fungus Erynia neoaphidis isolated from S. avenae and the seasonal fungal incidence percentage were 7.28±2.1 and 8.0±0.88% in the two seasons, respectively. In addition to the last fungus isolated from R. padi for the second season and the seasonal fungal incidence percentage was 1.43±0.29%. Two primary aphid parasitoids were found in the two seasons: the first primary parasitoid was Aphidius rhopalosiphi and the seasonal percentage of parasitism on R. padi and S. avenae were 1.21±0.18 and 2.06±0.65% for the first season and 2.37±0.08 and 3.13±0.27% for the second season. The second primary parasitoid was Praon volucre and the seasonal percentage of parasitism on R. padi and S. avenae were 0.56±0.16 and 3.54±0.40% for first season and 1.63±0.35 and 4.20±0.36% for second season. The primary aphid parasitoids were attacked by three secondary parasitoids by the end of seasons on both aphid species except for R. padi parasitoids was found in the middel of the first season. It was observed that some aphid mummies not emerged to parasitoids on both aphid species on the two seasons except on the first season was not recorded on R. padi mummies. Results appeared the role of entomopathogenic fungi and aphid parasitoids as natural mortality factors of cereal aphids in Egypt. | ||||
| Keywords | ||||
| Entomopathogenic fungi; Parasitoids; aphids; wheat crop; Egypt | ||||
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