烟粉虱MED隐种对不同烟草品种的适合度比较

Fitness of Whitefly Bemisia tabaci MED on Different Tobacco Cultivars

烟粉虱MED隐种是近年来烟草上的重要害虫,为明确不同烟草品种对烟粉虱的抗性水平,应用微虫笼研究了烟粉虱在6个烟草品种上的寿命、产卵量、卵-成虫存活率、发育历期等重要生物学参数,比较了烟粉虱对不同烟草品种的适合度差异。结果表明:除卵孵化率外,烟粉虱MED隐种在供试烟草品种上的寿命、产卵量、卵-成虫存活率、发育历期均存在显著差异。雌成虫寿命和产卵量均以在翠碧1号上最高(35.9 d,236.5粒),在NC89上最低(9.6 d,27.8粒);雄成虫寿命在K326上最长(7.2 d),在云烟87上最短(1.8 d);卵-成虫存活率在红花大金元上最高(91.6%),在云烟87上最低(81.4%);发育历期在红花大金元上最短(19.5 d),在云烟99上最长(21.1 d)。烟粉虱MED隐种对不同烟草品种的适合度高低顺序为翠碧1号、K326>红花大金元>云烟99、云烟87>NC89。

Bemisia tabaci MED has been an important pest insect in tobacco production in China in recent years.To understand the resistance of different tobacco cultivars to B.tabaci MED,we compared the performance of whiteflies on seedlings of 6 widely cultivated tobacco cultivars by using clip-cages in this study.The results showed that longevity,fecundity,survival and development time,but not hatch ratios of eggs of B.tabaci MED differed significantly on different tobacco cultivars.The highest longevity of whitefly males was found on K326 with 7.2 days,and the lowest was found on Yunyan 87 with 1.8 days.For females,the highest longevity was found on Cuibi 1 with 35.9 days,and the lowest was found on NC89 with 9.6 days.The highest and lowest fecundity were observed on Cuibi 1(236.5 eggs per female)and NC89(27.8 eggs per female),respectively.Whiteflies developed the fastest on Honghuadajinyuan(19.5 d)but the slowest on Yunyan 99(21.1 d).The highest and lowest survival rates were found on Honghuadajinyuan(91.6%)and Yunyan 99(81.4%),respectively.In conclusion,fitness of B.tabaci MED on different tobacco cultivars ranked as Cuibi 1 and K326>Honghuadajinyuan>Yunyan 99 and Yunyan 87>NC89.