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首页> 外文期刊>Journal of Chemical Ecology >Effects of Allelochemicals from First (Brassicaceae) and Second (Myzus persicae and Brevicoryne brassicae) Trophic Levels on Adalia bipunctata
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Effects of Allelochemicals from First (Brassicaceae) and Second (Myzus persicae and Brevicoryne brassicae) Trophic Levels on Adalia bipunctata

机译：第一类（十字花科）和第二类（Myzus persicae和Brevicoryne Brasicae）营养水平对双歧阿达利亚的影响

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摘要

Three Brassicaceae species, Brassica napus (low glucosinolate content), Brassica nigra (including sinigrin), and Sinapis alba (including sinalbin) were used as host plants for two aphid species: the generalist Myzus persicae and the specialist Brevicoryne brassicae. Each combination of aphid species and prey host plant was used to feed the polyphagous ladybird beetle, Adalia bipunctata. Experiments with Brassicaceae species including different amounts and kinds of glucosinolates (GLS) showed increased ladybird larval mortality at higher GLS concentrations. When reared on plants with higher GLS concentrations, the specialist aphid, B. brassicae, was found to be more toxic than M. persicae. Identification of GLS and related degradation products, mainly isothiocyanates (ITC), was investigated in the first two trophic levels, plant and aphid species, by high-performance liquid chromatography and gas chromatography–mass spectrometry, respectively. While only GLS were detected in M. persicae on each Brassicaceae species, high amounts of ITC were identified in B. brassicae samples (allyl-ITC and benzyl-ITC from B. nigra and S. alba, respectively) from all host plants. Biological effects of allelochemicals from plants on predators through aphid prey are discussed in relation to aphid species to emphasize the role of the crop plant in integrated pest management in terms of biological control efficacy.
机译：三种芸苔科物种：甘蓝型油菜（芥子油苷含量低），黑芥子（包括芥子苷）和西纳毕芥（包括sinalbin）被用作两个蚜虫物种的寄主植物：通配的Myzus persicae和专门的Brevicoryne Brasicae。蚜虫物种和猎物寄主植物的每种组合都用于喂养多食性瓢虫甲虫Adalia bipunctata。含有不同数量和种类的芥子油苷（GLS）的十字花科物种的实验表明，在较高的GLS浓度下，瓢虫幼虫死亡率增加。当在具有较高GLS浓度的植物上饲养时，发现蚜虫B. brasicae比B. persicae具有更高的毒性。通过高效液相色谱和气相色谱-质谱法分别在前两个营养级（植物和蚜虫物种）中研究了GLS和相关降解产物（主要是异硫氰酸盐（ITC））的鉴定。虽然在每个十字花科物种的百日草中仅检测到GLS，但在所有寄主植物的芸苔杆菌样品（分别来自黑芥子和白芥中的烯丙基-ITC和苄基-ITC）中鉴定到了大量的ITC。讨论了与蚜虫有关的植物化感物质对蚜虫的捕食者的生物学效应，从生物防治功效的角度强调了农作物在病虫害综合治理中的作用。

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