Monitoring the fluctuations of certain piercin sucking pests infesting cucumber plants at Sohag governorate, Egypt
The population fluctuations of five piercingsucking pests; melon aphid, Aphis gossypii (Glover); cotton whitefly, Bemisia tabaci (Genn.); potato leafhopper, Empoasca decipiens (Paoli); onion thrips, Thrips tabaci (Lind.) and two-spotted spider mite, Tetranychus urticae (Koch) were investigated on Hail cucumber variety during autumn and spring plantation from 2014 to 2016 seasons. As a result in autumn plantation, population of aphid and whitefly had one peak during 2014 and 2015 seasons , meanwhile, thrips population recorded three peaks in the same seasons. Otherwise, in spring plantationin 2015 and 2016 seasons, the populations of aphid and thrips recorded three peaks and one peak, respectively. In the meantime, the whitefly’s population showed three and two peaks, respectively. Leafhopper was the lowest sucking insect attacked cucumber during the two plantations throughout 2014, 2015 and 2016 growing seasons. The two-spotted spider mite only observed on spring plantation 2015 and 2016 and recorded one peak through the growing seasons. It could be concluded that planting date is effective on population fluctuations of piercing sucking pest and can be avoided by planting in late planting date.
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