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Eocanthecona furcellata (Wolff) (Hemiptera: Pentatomidae), a potential biocontrol agent of the black inch worm, Hyposidra talaca Walker (Lepidoptera: Geometridae) infesting tea
Phytoparasitica ( IF 1.5 ) Pub Date : 2021-01-23 , DOI: 10.1007/s12600-021-00888-x
Suman Sarkar , Azariah Babu , Kaushik Chakraborty , Bhabesh Deka , Somnath Roy

Field observations were made to find out seasonal abundance of Eocanthecona furcellata (Wolff) (Hemiptera: Pentatomidae) a predatory bug of an invasive pest, the black inch worm, Hyposidra talaca Walker (Lepidoptera: Geometridae) in tea ecosystem. The trend of population study revealed that E. furcellata was abundant throughout the cropping period, with peaks during June to September. Investigations were also carried out on the biology and predatory efficiency of E. furcellata on the larvae of H. talaca. The fecundity of the predatory bug was recorded as 276.6 ± 15.8 eggs/female. The incubation period was 7.0 ± 1.0 days, total nymphal development period 21.8 ± 0.7 days and adult longevity was 30.8 ± 1.9 days. Construction of life table of E. furcellata by rearing the tea looper H. talaca indicated that, the life table parameters like, intrinsic rate of natural increase (rm) was 0.149, net reproductive rate (Ro) was 218.14 eggs/female, gross reproduction rate (∑mx) was 244.69, generation time (T) 35.49 d, doubling time (DT) 4.63 d and finite rate of increase (λ) was 1.161. The adult female consumed 10.2 ± 0.8 s instar looper in ‘no-choice’ condition, whereas in ‘free- choice’ condition the consumption was 9.8 ± 1.1 second instar and 5.4 ± 1.1 fifth instar larvae of H. talaca per day. The impact of commonly used pesticides on the predator indicated varying degree of mortality on nymphs and adults after 24 h of exposure. Hence, E. furcellata could effectively be utilized in the IPM programme envisaged for tea for effective management of H. talaca.



中文翻译:

Eocanthecona furcellata(Wolff)(半翅目:Pentatomidae),一种潜在的防治黑寸蠕虫的生物,塔塔拉虫草(Hyposidra talaca Walker)(鳞翅目:Geometridae)感染茶

进行了野外观察,以发现茶生态系统中一种侵染性害虫,黑寸虫Hyposidra talaca Walker(鳞翅目:鳞翅目)的掠食性昆虫Eocanthecona furcellata(Wolff)(半翅目:Pentatomidae)的季节性丰富度。种群研究的趋势表明,在整个种植期间,大肠埃希菌都丰富,在6月至9月达到高峰。还研究了E. furcellataH. talaca幼虫的生物学和捕食效率。捕食性臭虫的繁殖力记录为276.6±15.8个卵/雌性。潜伏期为7.0±1.0天,总若虫发育期为21.8±0.7天,成年寿命为30.8±1.9天。通过饲养茶loopH。talaca,构建了E. furcellata生命表,该生命表参数例如,自然内在增长率(rm)为0.149,净生殖率(Ro)为218.14卵/雌性,总繁殖速率(∑mx)为244.69,生成时间(T)为35.49 d,倍增时间(DT)为4.63 d,有限的增长率(λ)为1.161。成年雌性在“无选择”条件下消耗了10.2±0.8 s的幼虫,而在“自由选择”条件下,幼虫的消耗为9.8±1.1秒和5.4±1.1龄幼虫。H. talaca每天。常用农药对捕食者的影响表明,若暴露24 h,若虫和成虫的死亡率不同。因此,E。furcellata可以有效地用于IPM计划的茶中,以有效管理塔拉克

更新日期:2021-01-24
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