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http://dx.doi.org/10.5656/KSAE.2007.46.3.401

Differentiation in Feeding Behaviour of Biotypes B and Q of Bemisia tabaci (Homoptera: Aleyrodidae) against Three Insecticides  

Seo, Mi-Ja (Dept. of Plant Medicine, College of Agricultural, Life, and Environment, Chungbuk National University)
Yang, Jeong-Oh (Dept. of Plant Medicine, College of Agricultural, Life, and Environment, Chungbuk National University)
Yoon, Chang-Mann (Dept. of Plant Medicine, College of Agricultural, Life, and Environment, Chungbuk National University)
Youn, Young-Nam (Dept. of Applied Biology, College of Agricultural and Life Science, Chungnam National University)
Kim, Gil-Hah (Dept. of Plant Medicine, College of Agricultural, Life, and Environment, Chungbuk National University)
Publication Information
Korean journal of applied entomology / v.46, no.3, 2007 , pp. 401-408 More about this Journal
Abstract
The feeding behaviors of 2 biotypes (type B and Q) of tobacco whitefly, Bemisia tobaci, were monitored using EPG technique on tomato and pepper plants treated 3 insecticides for controlling whiteflies, for examples, acetamiprid, spinosad and thiamethoxam. After treatment of three insecticides with recommended concentrations to tomato and pepper plants, EPG waveforms were recorded during 6 hours. The characteristic patterns of feeding behaviors investigated were as follows; time consumed by withdrawal of proboscis, total non-penetration time, total stylet pathway pattern time and total phloem feeding time. There was somewhat difference among 3 insecticides tested. As a result of investigation of total duration showed the stylet pathway activity due to the reaction against all tested insecticides, the Q biotype showed fewer time than those from the B biotype. The B biotype showed more frequent stylet pathway activity patterns during whole recording time and a shorter phloem ingestion time than those from the Q biotype. In result of prior up (non-penetration) time representing the reaction against the insecticide treated, the time of B biotype was more faster than that of the Q biotype, so it was considered that the B biotype was more sensitive to the tested insecticides. Therefore, our results revealed a clear difference in feeding behaviour between the B and Q biotypes of B. tabaci. Also, it was investigated that B biotype was susceptible to the 3 insecticides.
Keywords
Bemisia tabaci; Biotypes; EPG; Feeding behavior;
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