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首页> 外文期刊>Journal of environmental science and health >Growing hot pepper for cabbage looper, Trichopulsia ni (Huebner) and spider mite, Tetranychus urticae (Koch) control
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Growing hot pepper for cabbage looper, Trichopulsia ni (Huebner) and spider mite, Tetranychus urticae (Koch) control

机译：种植辣椒，用于卷心菜弯头，Trichopulsia ni（Huebner）和红蜘蛛，Tetranychus urticae（Koch）防治

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With the public perception that synthetic pesticides leave harmful residues in crop produce for human consumption, there has been increased interest in using natural products for pest control. The potential of using fruit extracts of hot pepper for controlling the cabbage looper, Trichopulsia ni (Hiibner) and spider mite, Tetranychus urticae Koch is explored in this investigation. Crude extracts from fruits of Capsicum chinense, C.frutescens, C. baccatum, and C. annuum, were prepared and tested under laboratory conditions for their insecticidal and acaricidal performance. Mortality was greatest (94%) when fruit extract of accession PI-593566 (C. annuum) was sprayed on larvae of the cabbage looper, while crude extracts of accessions PI-241675 (C.frutescens) and PI-310488 (C. annuum) were repellent to the spider mite. We investigated differences in chemical composition of the crude fruit extracts that may explain the observed differences in mortality and repellency between accessions. Gas Chromatography-Mass Spectrometry spectrometric analysis revealed that capsaicin and dihydrocapsaicin, the pungent components of pepper fruit, were not correlated with toxicity or repellency, indicating that the two capsaicinoids are not likely related to the efficacy of pepper fruit extracts. Major compounds in hot pepper fruit extracts were detected and identified as pentadecanoic acid methyl ester, hexadecanoic acid methyl ester, and octadecanoic acid methyl ester. Spectrometric analysis and toxicity to cabbage looper larvae revealed that pentadecanoic acid methyl ester is likely related to cabbage looper mortality. However, the concentration of pentadecanoic acid methyl ester in some accessions was insufficient to explain the observed mortality of cabbage looper and repellency of spider mite. Fruit extracts of accessions PI-593566 (C. annuum) and PI-241675 (C.frutescens) could be useful for managing populations of cabbage loopers and spider mites, which could reduce reliance on synthetic pesticides. Further study is needed to investigate performance of hot pepper extracts under ultra-violet light and field conditions.
机译：由于公众认为合成农药会在农作物中留下有害残留物供人类消费，因此人们越来越有兴趣使用天然产品进行病虫害防治。在这项研究中，探索了使用辣椒的果实提取物控制卷心菜弯头，Trichopulsia ni（Hiibner）和红蜘蛛Tetranychus urticae Koch的潜力。制备了辣椒，C.frutescens，C.baccatum和C.annuum果实的粗提物，并在实验室条件下对其杀虫和杀螨性能进行了测试。当将PI-593566（C. annuum）的果实提取物喷洒在卷心菜的幼虫上时，死亡率最高（94％），而PI-241675（C.frutescens）和PI-310488（C. annuum）的粗提物喷雾）对红蜘蛛具有驱避作用。我们调查了粗果提取物化学成分的差异，这可以解释观察到的种质间死亡率和防护性的差异。气相色谱-质谱分析表明，辣椒果实中的辛辣成分辣椒素和二氢辣椒素与毒性或驱避性无关，表明这两种辣椒素与辣椒果实提取物的功效不太可能相关。检测到辣椒果实提取物中的主要化合物，并将其鉴定为十五烷酸甲酯，十六烷酸甲酯和十八烷酸甲酯。光谱分析和对白菜loop幼虫的毒性表明，十五烷酸甲酯可能与白菜loop的死亡率有关。然而，某些种中十五烷酸甲酯的浓度不足以解释所观察到的白菜弯角er的死亡率和红蜘蛛的驱避性。 PI-593566（C. annuum）和PI-241675（C.frutescens）的果实提取物可用于管理白菜弯角和红蜘蛛的种群，从而减少对合成农药的依赖。需要进一步的研究来研究辣椒提取物在紫外光和野外条件下的性能。

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