CV型烟粉虱在三种变叶木上的发育和繁殖
Effect of different variegated leafcroton to the growth and reproduction of ‘CV ’ biotype Bemisia tabaci
林 莉1** 任顺祥2 邱宝利2
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作者单位：1.广东出入境检验检疫局检验检疫技术中心 广州 510623;2.华南农业大学资源环境学院昆虫学系/教育部生物防治工程中心 广州 510642
中文关键词： CV型烟粉虱，发育，繁殖，变叶木
英文关键词：CV biotype Bemisia tabaci, development, reproduction, variegated leafcroton
中文摘要： CV型烟粉虱Bemisia tabaci (Gennadius)是园林观赏植物上的重要害虫。本文在室内（26±1)℃下比较了CV型烟粉虱在撒金变叶木（Codiaeum variegatun ‘Aucubaefolium’）、美丽变叶木(C. variegatum nov.)和彩叶变叶木(C. variegaum ‘Mons\|florin’)3个变叶木品种上的发育和繁殖情况，结果表明在撒金变叶木上的发育历期最长，为32.8 d；在美丽变叶木和彩叶变叶木上分别为29.7 d和29.5 d，后两者差异不显著。彩叶变叶木上烟粉虱的世代存活率最高，达58.8％，其次为美丽变叶木为46.5％，在撒金变叶木上的存活率最低，为40.5％，三者间差异显著。CV型烟粉虱在撒金变叶木上的产卵前期最长，为0.8 d。烟粉虱成虫彩叶变叶木上的平均寿命最长，为14.9 d。CV型烟粉虱在3个品种上的平均单雌产卵56~81粒，相互间差异不显著。烟粉虱在撒金变叶木、美丽变叶木和彩叶变叶木3个品种上的rm分别为0.0397、0.0625和0.0860。综合比较，这3种变叶木均为CV型烟粉虱较合适的寄主。
英文摘要： The CV biotype of Bemisia tabaci(Gennadius) is a serious pest of ornamental plants. The effect on the growth, survival and reproduction of this biotype of three kinds of variegated leaf croton (Codiaeum variegatum ‘Aucubaefolium’, C. variegatum nov. and C. variegatum ‘Mons-florin’ ) was studied under husbandry conditions of （26±1）℃, 75%-90% relative humidity and L∶D＝14∶10. The longest developmental time, 32.80 days, was recorded on C. variegatum ‘Aucubaefolium’ followed by C. variegatum nov. (29.70 days) and C. variegatum ‘Mons-florin’ (29.45 days). Insects on different plant varieties differed significantly in total survivorship from egg to adult. Survivorship was highest on C. variegatum ‘Mons-florin’ (58.82%), intermediate on C. variegatum nov. (46.54%) and lowest on C. variegatum ‘Aucubaefolium’ (40.53%). The longest preoviposition period (0.79 days) was recorded on C. variegatum ‘Aucubaefolium’. Adult longevity was longest (14.89 days) on C. variegatum ‘Mons-florin’. There was no significant difference in average fecundity per female on the different plant varieties; the highest was recorded on C. variegatum ‘Aucubaefolium’(381 eggs/female). Intrinsic rates of natural increase (rm) on Codiaeum variegatum ‘Aucubaefolium’, C. variegatum nov. and C. variegatum ‘Mons-florin’ were 0.0397、0.0625 and 0.0860, respectively. All three varieties of variegated leaf-crotons were the suitable host plants for the development and reproduction of the CV biotype of B. tabaci.