Effects of tea saponin on growth and development, nutritional indicators, and hormone titers in diamondback moths feeding on different host plant species
文献类型： 外文期刊
作者： Cai, Hongjiao 2 ; Bai, Yan 2 ; Wei, Hui 1 ; Lin, Shuo 1 ; Chen, Yixin 1 ; Tian, Houjun 1 ; Gu, Xiaojun 2 ; Murugan, Kadar 1 ;
作者机构： 1.Fujian Acad Agr Sci, Inst Plant Protect, 247 Wusi Rd, Fuzhou 350003, Peoples R China
2.Fujian Agr & Forestry Univ, Coll Plant Protect, 15 Shangxia Dian Rd, Fuzhou 350002, Peoples R China
3.Jimei Univ, Fishery Coll, 43 Yindou Rd, Xiame 361021, Peoples R China
4.Bharathiar Univ, Sch Life Sci, Div Entomol, Dept Zool, Coimbatore 641046, Tamil Nadu, India
关键词： Diamondback moth;Growth development;Hormones;Nutritional indicators;Tea saponin
期刊名称：PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY （ 影响因子：3.963； 五年影响因子：4.454 ）
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收录情况： SCI
摘要： The diamondback moth (DBM) is an important worldwide pest. This insect has been studied for several decades; however, its control remains problematic. Numerous chemical insecticides have become ineffective and chemical residues constitute an important problem. In the present study, we determined the mortality of 3rd instar DBM larvae feeding on three different host plant species and exposed to various concentrations of tea saponin (TS). In addition, we evaluated growth and development parameters, nutritional indicators, and juvenile hormone (JH) and molting hormone (MH) titers in 2nd instar larvae exposed to LC20 and LC50 doses of TS. We found that treatment of DBM larvae with LC20 and LC50 doses of TS led to lower growth rates, decreased feed consumption, reduced frass production, lower pupal weights, reduced percentage pupation, slower adult emergence percentages, and diminished fecundity, but prolonged durations of the larval and pupal periods. The efficiency of conversion of ingested and digested food increased, but the approximate digestibility did not differ significantly between treatments and controls. JH and MH titers were higher after TS treatment; these increases varied according to the host species and TS concentration. Our results indicate that TS represents a potential new alternative insecticide based on its natural origin, low cost, and minimum environmental impact. (C) 2016 Elsevier Inc. All rights reserved.
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