Susceptibility of some sunflower cultivars for piercing sucking pests in Sohag Governorate [electronic resource].

Includes references.

This study was carried out to evaluate the susceptibility of certain cultivars of sunflower crop ( Giza 102, Pioneer6480, Sakha 53 and Miak) to certain piercing sucking pests' infestation under field conditions for two successive seasons (2010 & 2011) in Sohag governorate, Egypt. Data revealed that the tested sunflower cultivars have marked variation in their susceptibility to pest infestation. Giza102 & Sakha 53 cultivars were the most susceptible for E. decipiens nymphs and M. persicae pests infestation as it showed a mean number of 18.07 & 18.4 nymphs/15 leaflet & 4.89, 2.07 individual/15 sunflower leaflet followed by, Miak & pioneer6480 during 2010 season, a similar trend was obtained for two pests in 2011. On Fhe other hand, the resistant cultivars to the whitefly infestation could be arranged in ascending as follow: Sakha 53, Giza 102, Miak and Pioneer6480 &. The corresponding infestation rates averaged 49.07, 51.59, 66.52 and 70.96 & 53.67, 55.26, 62.11, 69.78 nymph/15 leafletlets, during 2010 and 2011 seasons, respectively.

Summary in Arabic.

1