Seasonal abundance of aphids on three common bean varieties, at Qalyubia Governorate, Egypt
2009
Abd El-Wahab, A.S. | El-Sheikh, M.A,K. | Mora, M.A. | El-Hariry, M.A.
This investigation was conducted at Qaha Agricultual Station, Qalyubia Governorate to survey the aphid fauna on three common bean varieties; Bronco, Polista and Contender and to study their seasonal abundance and the impact of varieties and sowing dates (Summer and Nili plantation) during the growing seasons 2005/2006 and 2006/2007 on the infestation rates with aphids. The obtained results reveled, 11 different aphid species in both growing seasons; A. kondoi was recorded for the first time in Egypt. From 6 to 9 species were recorded on the different plantations. Aphis fabae was the most common aphid species recorded in a relatively high number (995.9 and 466.66 individuals) also a general average in both seasons, followed by A. craccivora which, recorded (480.25 and 258.9 individuals) as general average on both seasons. A. pisum was the most dominant aphid species on summer the plantation on all varieties although its general average was not very high ( 6106 and 113.87 individuals),while both of Aphis fabae and A. craccivora were the most common aphids on nili plantation throughout the period of study on all varieties Generally speaking, the obtained results declared the aphid infestation was high in the nili plantation than in the summer, common bean plant variety contender was the least infested ones.
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