S. M. EZZAT, SH. A. M. ALI, M. TAHAA AND EL-FALOGI, S. A. MONA
Piercing and Sucking Insects Department, Plant Protection Research Institute, Sharkia Branch, Agriculture
Research Center, Giza, Egypt
*(e-mail : rose_flower447@yahoo.com; Phone : 00201096311001)
(Received : September 7, 2019; Accepted : November 10, 2019)
ABSTRACT
Cucumber plants were subjected to several major piercing-sucking insect-pests in El-Salhia district, Sharkia Governorate, Egypt. The most dangerous pests were two aphid species : Myzus persicae Sulzer and Aphis
gossypii (Glov.), whitefly, Bemisia tabaci (Genn.) and Thrips tabaci Lind. Highest infestation was by T. tabaci, which represented 53.96 and 54.31% of the total number of insect-pests followed by aphids 38.69 and 35.44% from the total number of insect-pests followed by B. tabaci 7.35 and 10.25% from the total number of insect-pests infesting cucumber plants during summer plantation of 2017 and 2018 seasons, respectively. In the autumn plantation, highest infestation was by B. tabaci witch represented 66.94 and 75.22% of the total number of insect-pests followed by aphids 30.43 and 22.26% than T. tabaci 2.63 and 2.52% from the total number of insect-pests infesting cucumber plants during autumn plantation of 2017 and 2018 seasons, respectively. The maximum mortality percentage recorded after seven days of application with spore concentration 1ױ07 was 98.66% and LC50 was obtained at concentration 5.95 נ104.
Key words : Survey, population density, insect-pests, cucumber, Egypt