Science Target Conference Systems, Ajman 4th International Environment Conference 2016

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MYCOPATHOGENIS OF CEREAL APHIDS INFESTING WHEAT PLANTS IN ASSIUT, UPPER EGYPT
Mohamed Alaa El-Dein Ahmed Abdel-Rahman

Last modified: 2015-08-15

Abstract


The present investigation was carried out during 2012/2013 and 2013/2014) wheat growing seasons. Incidence of mycopathogens infecting cereal aphids was evaluated. There are twelve identified species of entomopathogenic fungi infecting cereal aphids. The first case of mycosis was observed at the beginning of February. In addition, the number of diseased aphids increased towards end of March.

The results indicated that Pandora neoaphidis, Beauveria bassiana and Zoophthora radicans seem to be the most abundant entomopathogenic fungi as biological control agents. However, Beauveria brongniartii, B. alba, Condiobolus coronatus, C. obscurus, C. thromboids, Entomophthora planchoniana, and Paecilomyces farinosus could be of economic importance, if the environmental conditions changed in their favour. Meanwhile, the species of Verticillium lecanii and Basidiobolus sp. are expected to be of little economic importance.

Regarding seasonal incidence of these fungi species, Beauveria spp, Zoophthora radicans and Paecilomyces were observed from the beginning of February up to March 15th. Pandora neoaphidis and Conidiobolus spp. were detected one week later of the previous species till March 15th. Incidence with Entomophthora planchoniana lasted for one month from February 22nd to March 15th. Verticillium was scarce where it was observed two times only at the beginning of the season (from 1st to 8th February).

Key words: Wheat plants, Cereal aphids, mycopathogens