Weed host specificity of the aphid, Aphis spiraecola: developmental and reproductive performance of aphids in relation to plant growth and leaf chemicals of the Siam weed, Chromolaena odorata.
Weed host specificity of the aphid, Aphis spiraecola: developmental and reproductive performance of aphids in relation to plant growth and leaf chemicals of the Siam weed, Chromolaena odorata.
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DOI：
10.1673/031.012.2401
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Das J
中科院分区：
文献类型：
--
作者：
Agarwala BK;Das J
植物的密度、分布和营养品质是蚜虫寄主植物选择的因果基础。植物的营养品质根据其生长阶段以及季节变化而变化。在多年生暹罗杂草 Chromolaena odorata (L.) King 和 Robinson（紫苑目：菊科）上，研究了寄主植物生长阶段如何影响蚜虫的表现。这种植物是印度东北部和南部炎热潮湿的热带地区的首选寄主。记录了无翅胎生雌性蚜虫的发育和繁殖性能的变化，这些变化与香花不同生长阶段叶片化学物质的差异有关。蚜虫在发育时间最短的营养阶段繁殖率较高，繁殖时间较长的产卵量较高。据记录，杂草寄主的营养阶段的内在增长率和净繁殖率也较高。在营养阶段，叶子含有大量的蛋白质和氮，这对昆虫的繁殖至关重要。这项研究的结果表明，A spiraecola 的发育和繁殖性能与 C. odorata 的生长阶段同步，而 C. odorata 在研究区域大量存在。
Density, distribution, and nutritional quality of plants are the causal basis of host plant selection in aphids. Nutritional qualities of a plant vary according to its growth stage and also in response to seasonal variation. How host plant growth stages shape aphid performance was studied in Aphis spiraecola Patch (Homoptera: Aphididae) on the perennial Siam weed, Chromolaena odorata (L.) King and Robinson (Asterales: Asteraceae). This plant species is the preferred host in the hot and humid tropical parts of northeast and southern India. Variations in developmental and reproductive performances in apterous viviparous female aphids were recorded in relation to differences in leaf chemicals in different growth stages of C. odorata. Aphids reproduced at higher rates in the vegetative stage of C. odorata when developmental time was shortest, and fecundity was higher in a longer reproductive time. Intrinsic rate of increase and net reproductive rate were also recorded to be higher in the vegetative stage of the weed host. In the vegetative stage, leaves contained higher quantity of proteins and nitrogen, which are vital for insect reproduction. Results of this study have demonstrated that A spiraecola showed synchronization of its developmental and reproductive performances to growth stages of C. odorata, which occur in high abundance in the study area.