SEASONAL ABUNDANCE AND POPULATION FLACTUATION OF CERTAIN MIDICINAL PLANT PESTS AND THEIR ASSOCIATED NATURAL ENEMES IN ASSIUT GOVERNORATE, EGYPT

Abd El-Raheem, A. A.; Abd EL-Wareth, H. M.

doi:10.21608/jppp.2015.75425

SEASONAL ABUNDANCE AND POPULATION FLACTUATION OF CERTAIN MIDICINAL PLANT PESTS AND THEIR ASSOCIATED NATURAL ENEMES IN ASSIUT GOVERNORATE, EGYPT

Document Type : Original Article

Authors

Plant Protection Institute, Agricultural Research Center, Dokki, Egypt

10.21608/jppp.2015.75425

Abstract

Field trails were undertaken to determine the seasonal abundance and population fluctuations of key insect pests infesting caraway, cumin and chamomile plants. The most pests associated with these plants were Myzus persicae (Sulzer), Aphis craccivora Koch and Thrips tabace Lindeman. The most numerous pests on caraway plants were T. tabace. It constituted about 45.47% and 62.85% out of the grand total of pests in 2013 and 2014 seasons, respectively. Whereas M. persicae was the most dominant insect pest on cumin plants, constituting about 60.97% and 58.92% out of grand total of pests in first and second seasons, respectively. On chamomile crop M. persicae was the numerous pest as compared with the other insect pests (54.17% and 71.70%). The highest level of abundance was recorded during March and April. Temperature and relative humidity significantly affected the population densities of these pests. The dominant predators were Coccinella undecimpunctata Reiche, Scymnus interruptus Gaeze, Orius spp., Chrysoperla carnea [Stephens] Paedrus alfirri Kock, Syrphus corolla F. and true spiders. These predators attained their maximum population densities during February and March.