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A SURVEY OF SIZES AND WEIGHTS OF bemisia tabaci（HOMOPTERA： ALEYRODIDAE）b biotype LIFE STAGES FROM FIELD GROWN COTTON AND CANTALOUPES

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Entomologia Sinica 2003年第2期10卷 121-130页

作者： Chang-chiChu JamesS.buckner KamilKarut ThomasP.Freeman DennisR.Nelson ThomasJ.Henneberryl USDA ARSWestern Cotton Research Laboratory4135E.Broadway RoadPhoenixAZ85040 USA USDA ARSBiosciences Research LaboratoryFargoND58105 USA Cukurova University Agricultural FacultyDepartnrent of Plant Protection01330AdanaTurkey Electron Microscopy Center North Dakota State UniversityND58105 USA

Size and weight measurements were made for all the life stages of bemisia tabaci (Gennadius) b biotype from field grown cotton ( Gossypium hirsutum L. ) and cantaloupe ( Cucumis melo L., var. cantalupensis )in Phoenix, AZ and Fargo, ND, USA in 2000 and 2001. Nymphal volumes were derived from the *** average nymphal volume increase for settled 1 st to the late 4th instar was exponential. The greatest increase in body volume occurred during development from the 3rd to early 4th instar. Nymphs on cotton leaves were wider,but not longer compared with those on cantaloupe. Ventral and dorsal depth ratios of nymphal bodies from 1st tolate 4th instars from cantaloupe leaves were significantly greater compared with those from cotton leaves. During nymphal development from 1st to 4th instar, the average (from the two host species) ventral body half volume in-creased by nearly 51 times compared with an increase of 28 times for the dorsal body half volume. Adult female and male average lengths, from heads to wing tips, were 1 126 μm and 953 μm, respectively. Average adult fe-male and male weights were 39 and 17 μg, respectively. Average widths, lengths, and weights of eggs from cottonand cantaloupe were, 99 μm, 197 μm, and 0.8 μg, respectively. Average widths, lengths, and weights for exu-viae of non-parasitized nymphs from both cotton and cantaloupe were 492 μm, 673 μm, and 1.20 μg, respective-ly; and widths, lengths, and weights of parasitized nymph exuviae were 452 μm, 665 μm, and 3.62 μg, respec-tively. both exuviae from non-parasitized and parasitized nymphs from cotton leaves were wider, longer, and heavier than those from cantaloupe leaves.

关键词： bemisia tabaci b biotype bemisia argentifolii body size body weight body volume parasitized exuviae

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Effects of host, temperature and relative humidity on competitive displacement of two invasive bemisia tabaci biotypes [Q and b]

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Insect Science 2012年第5期19卷 595-603页

作者： Dong Chu Yun-Li Tao You-Jun Zhang Fang-Hao Wan Judith K brown High-tech Research Center Shandong Academy of Agricultural Sciences Institute of Vegetables and Flowers Chinese Academy of Agricultural Sciences State Key Laboratory for biology of Plant Diseases and Insect Pests Institute of Plant Protection Chinese Academy of Agricultural Sciences Beijing China School of Plant Sciences The University of Arizona Tucson USA

bemisia tabaci shifted unexpectedly in China from a predominance of b biotype to Q biotype during 2005-2008. This observation stimulated an interest in inves- tigating whether environmental factors, including host, temperature and relative humidity （RH） could possibly explain the observed shift in biotypes distribution. Results indicated that all three parameters examined influenced biotype survivability. The percentage of b biotype, when reared together on pepper plants with the Q biotype, decreased significantly from 66.7% in the founder population, to 13.6% and 3.7% in the first and second genera- tions, respectively. When the b （founder at 66.7%） and Q （founder at 33.3%） biotypes were reared together on eggplant alone, or on pepper-plus-eggplant combination, the population size of the b biotype either remained constant, or increased somewhat in the first and sec- ond generations. On eggplant, the effects of RH and temperature on the competitiveness between the Q and b biotypes （3 pairs of Q and 6 pairs of b） were not significant.

关键词： bemisia tabaci b biotype Q biotype biological invasion host plant non-competitive displacement

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