Fourth International Bemisia Workshop International Whitefly Genomics Workshop
Development, Longevity, Fecundity, and Survivorship of Bemisia tabaci (Gennadius) Biotype ‘B’ on Six Cotton Cultivars
1 Institute of Plant and Environment Protection, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China. Correspondence: Luochen1010@yahoo.com.cn
2 Department of Entomology, College of Plant Protection, Shandong Agricultural University, Taian, China
We studied the development, longevity, fecundity, and survivorship of Bemisia tabaci biotype ‘B’ on six cotton cultivars: GK-12 (Bt), AST-104, CCRI 19, Liao-Yang (hirsute), ZGK-9708 (Bt+CpTI), and Liao 7238 at 27 ± 1°C, 60% RH and a photoperiod of 14:10 (L:D) h in the laboratory. Our results show that the developmental time, survivorship, and fecundity of B. tabaci were significantly different on the six cotton cultivars except for the adult longevity that was not significantly different among the cotton cultivars. The developmental times of B. tabaci from egg to adult were 22.3, 21.9, 24.2, 21.6, 22.5 and 20.8 d on GK-12 (Bt), AST-104, CCRI 19, Liao-Yang (hirsute), ZGK-9708 (Bt+CpTI) and Liao 7238, respectively. The total survivorship from egg to adult was 39.3, 37.0, 29.3, 58.3, 38.8, and 25.0%, respectively. Fecundity varied from 138.1 eggs per female on CCRI 19 to 80.8 eggs per female on GK-12. The intrinsic rate of natural increase (r m ) of B. tabaci on Liao-Yang (hirsute) was the highest (0.1121), where that on Liao 7238 was the lowest (0.0844). The development and reproduction of B. tabaci on the two Bt-transgenic cotton cultivars (GK-12 and ZGK-9708) were not significantly different from those on the other four non-Bt transgenic cottons.