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Issue:ISSN 2095-1353
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Your Position :Home->Past Journals Catalog->2008年45 No.3

Behavior selection of Bemisia tabaci Bbiotype to different host plants and colors
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Key Words:Bemisia tabaci Bbiotype, host plant, color, behavior selection
Abstract:Effect of different plant species and colors on host preference of Bemisia tabaci (Gennadius) B-biotype was studied in the present study. The quantity of adults and eggs per plant on five species of host plants were assessed in selection test in a cage, the results revealed that significantly different host preference of female adults was present in different plants. The preference order was tomato>cabbage>pepper>tobacco and cotton>pepper. With the time going, the amount of adults in tomato increased gradually, and that in cabbage decreased, whereas no dramatic change occurred in tobacco and cotton. Eggs B. tabaci B-biotype layed in different host plants were cabbage>tomato>cotton, and tobacco>pepper, and egg production in cabbage and tomato respectively accounted for 56.8% and 28.2% number of total eggs, whereas that in tobacco, cotton and pepper all accounted for less than 6.0% number of total eggs. Furthermore, a Y-tube olfactometer wasused to test the role of volatiles from host plants and colors in host selection by B. tabaci. It was found that odors of tomato and cabbage showed significant attractiveness to B. tabaci, odors of tomato being more attractiv; but odors of pepper had no attractiveness to B. tabaci. The green leaves of tomato, cabbage and pepper all showed significant attractiveness to B. tabaci adults, and no significant difference existed in the three plants. B tabaci adults could be attracted by green and yellow color but not by red color. When B. tabaci were faced with both green and yellow color at the same time, they were more attracted by yellow than by green. All results abovementioned indicated that both vision and olfaction of B. tabaci played important roles in host orientation and selection; olfaction was crucial to host orientation and selection of green hosts, and vision was crucial to host orientation and selection of red, green and yellow hosts.
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