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Relative preference and demographic parameters of Encarsia formosa Gahan against Trialeurodes vaporariorum (Westwood)
Egyptian Journal of Biological Pest Control ( IF 2.1 ) Pub Date : 2021-05-06 , DOI: 10.1186/s41938-021-00424-3
Anamika Walia , S. C. Verma , P. L. Sharma , Nidhi Sharma , Shivani Palial

The greenhouse whitefly, Trialeurodes vaporariorum (Westwood) (Hemiptera: Aleyrodidae), is a cosmopolitan, polyphagous and a serious pest of vegetables and ornamentals in greenhouse. Encarsia formosa Gahan (Hymenoptera: Aphelinidae) is an important primary endoparasitoid species of the greenhouse whitefly. In the present study, per cent parasitisation attained 50% on the 4th instar and 46% on the third 3rd instar of T. vaporariorum by E. formosa. The mean duration period of the parasitoid from egg to host mummification, mummification to adult emergence (pupal period) was 11 and 7.8 days on 3rd instar and 8.5 and 7.6 days on 4th instar, respectively. The total time period from egg to adult emergence reached 18.8 days on 3rd instar and 16.2 days on 4th instar. Longevity of the female parasitoids was 8.3 and 8.8 days on 3rd and 4th instars, respectively. The pre-ovipositional, ovipositional and post-ovipositional periods of the parasitoid were 1.2, 6.4 and 1.0 days on 3rd instar and 1.2, 6.7 and 1.0 days on 4th instar, respectively. The finite rate of natural increase (λ), doubling time and weekly multiplication rate of the 3rd instar was 1.16±0.002 times per day, 4.71±0.04 days and 2.80±0.03 folds, respectively and 1.17±0.002 times per day, 4.34±0.04 days and 3.06±0.03 folds for the 4th instar. Studies indicated that the 4th nymphal instar of the host was more suitable for parasitisation with E. formosa. The parasitoid species could be mass multiplied and utilised as a component of integrated pest management programme of T. vaporariorum after evaluation under field conditions.

中文翻译:

相对偏好和人口参数丽蚜小蜂加恩对温室白粉虱(维斯特伍德)

温室白粉虱Trialeurodes vaporariorum(Westwood)(半翅目:Aleyrodidae)是一种国际化的,多食性的,是温室中蔬菜和观赏植物的严重害虫。恩卡斯虫(Encarsia formosa Gahan)(膜翅目:Aphelinidae)是温室粉虱的重要内寄生寄生物。在本研究中,福尔摩沙。在四龄幼虫的寄生率达到50%,在三龄幼虫的第三寄生率达到46%。从卵到宿主木乃伊到成年木乃伊的成虫(pu期)的平均持续时间分别为三龄和十一龄,分别为11天和7.8天,四龄分别为8.5天和7.6天。从卵到成年的总时间在三龄期达到了18.8天,四龄期达到了16.2天。第三和第四龄雌性寄生虫的寿命分别为8.3天和8.8天,分别。副寄生虫在产卵前,产卵期和产卵后期分别在三龄幼虫期为1.2、6.4和1.0天,在四龄幼虫期为1.2、6.7和1.0天。第三龄幼虫的自然增长率(λ),倍增时间和每周繁殖率的有限度分别是每天1.16±0.002倍,4.71±0.04天和2.80±0.03倍,每天1.17±0.002倍,每天4.34±0.04第四天的幼虫天数和3.06±0.03倍。研究表明,寄主的第4龄幼虫更适合于福尔摩沙。寄生。在田间条件下进行评估后,可将这种寄生虫种类进行大量繁殖,并用作烟粉虱综合害虫管理计划的组成部分。三龄期分别为4天和1.0天,四龄期分别为1.2天,6.7天和1.0天。第三龄幼虫的自然增长率(λ),倍增时间和每周繁殖率的有限度分别是每天1.16±0.002倍,4.71±0.04天和2.80±0.03倍,每天1.17±0.002倍,每天4.34±0.04第四天的幼虫天数和3.06±0.03倍。研究表明,寄主的第4龄幼虫更适合于福尔摩沙。寄生。在田间条件下进行评估后,可将这种寄生虫种类进行大量繁殖,并用作烟粉虱综合害虫管理计划的组成部分。三龄期分别为4天和1.0天,四龄期分别为1.2天,6.7天和1.0天。第三龄幼虫的自然增长率(λ),倍增时间和每周繁殖率的有限度分别是每天1.16±0.002倍,4.71±0.04天和2.80±0.03倍,每天1.17±0.002倍,每天4.34±0.04第四天的幼虫天数和3.06±0.03倍。研究表明,寄主的第4龄幼虫更适合于福尔摩沙。寄生。在田间条件下进行评估后,可将这种寄生虫种类进行大量繁殖,并用作烟粉虱综合害虫管理计划的组成部分。4龄幼虫分别为04天和2.80±0.03倍,每天1.17±0.002倍,4.34±0.04天和3.06±0.03倍。研究表明,寄主的第4龄幼虫更适合于福尔摩沙。寄生。在田间条件下进行评估后,可将这种寄生虫种类进行大量繁殖,并用作烟粉虱综合害虫管理计划的组成部分。4龄幼虫分别为04天和2.80±0.03倍,每天1.17±0.002倍,4.34±0.04天和3.06±0.03倍。研究表明,寄主的第4龄幼虫更适合于福尔摩沙。寄生。在田间条件下进行评估后,可将这种寄生虫种类进行大量繁殖,并用作烟粉虱综合害虫管理计划的组成部分。
更新日期:2021-05-07
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