ُEffect of climatic factors, predators and plant age on the population dynamics of Empoasca decipiens and Thrips tabaci on kidney bean plants
Abstract: The present work was carried out to study the effect of climatic factors (temperature and relative humidity), associated predators [Coccinella undecimpunctata L., Scymnus interruptus Coeze, Chrysoperla carnea (Steph.) and Orius albidipennis (Reut.)] and plant age on the population density of Empoasca decipiens Paoli and Thrips tabaci Lind., infesting bean plants during two successive seasons. Plant age effect was considered as third degree of polynomial.
The results indicated that, jassid populations were higher than thrips and had one peak of abundance on May 28th and 27th while thrips population had one peak of abundance on May 14th and 20 th during 2005 and 2006 seasons, respectively. Concerning the total predators, two peaks occurred during May and June in both seasons.
The population of E. decopiens was affected insignificantly by climatic factors in the two seasons. While the predators had significant positive effect on jassid population during two seasons. The population of T. tabaci was affected insignificantly by the climatic factors and predators in the two seasons except for minimum temperature which affected it significantly in the first season. Plant age affected the population significantly in the first and second seasons. This means that, the plant age had more effect on Jassid and thrips populations compared with the role of climatic factors and predators. The explained variance due to plant age was (87.76 and 95.41%) for jassid, (92.08% and 76.94%) for thrips during two seasons. Plant age is expected to reflect leave contents of nutritional values according to plant phenology.
Publication year 2007
Pages 693-702
Availability location معهد بحوث وقاية النباتات - 7 شارع نادي الصيد - الدقي - الجيزة
Availability number
Organization Name
City الزقازيق
serial title المجلة المصرية للعلوم التطبيقية
ISSN 1110-1571
Author(s) from ARC
Agris Categories Protection of plants - General aspects
AGROVOC
TERMS		 Chrysoperla carnea. Climatic factors. Coccinella. Empoasca. Kidney beans. Orius. Population dynamics. Predators. Scymnus. Thrips tabaci.
Proposed Agrovoc orius albidipennis;Coccinella undecimpuncatata;
Publication Type Journal
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