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首页> 外文期刊>Journal of entomology >Insecticidal effects of Croton urucurana extracts and crude resin on Dysdercus maurus (Hemiptera: Pyrrocoridae).
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Insecticidal effects of Croton urucurana extracts and crude resin on Dysdercus maurus (Hemiptera: Pyrrocoridae).

机译：乌鲁木（Croton urucurana）提取物和粗制树脂对毛豆（Dysdercus maurus）（半翅目：Pyrrocoridae）的杀虫作用。

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Yield loss in different crops due to the attack of various classes of insect pests is a worldwide problem. Sucking type Dysdercus maurus causes damage to many crop species. Diverse plant species have been studied in order to identify the active ingredients responsible for their insecticidal activity against pests of economic importance. To verify the insecticidal activity of the stem bark and crude resin of Croton urucurana Baillon 1864 (Euphorbiaceae) against Dysdercus maurus Distant 1901 (Hemiptera: Pyrrhocoridae), the methanolic (EMeOH) extract, dichloromethane fraction (FDM), ethyl acetate fraction (FAE) and crude resin were applied topically with micro-applicator on the dorsal side of the mesothoracic region of third instar nymphs and the ventral side of adult insects and incorporated into an artificial diet. The average adult mortality of Dysdercus maurus treated topically with 0.5, 1.0 and 2.0% of the extracts mentioned above was significantly higher compared to controls. The FAE showed high insecticidal potential, having a higher mortality rate, extending the duration of the larval stages and resulting in malformed adults. Third instar nymphs fed with artificial seeds containing 1% FAE died three days after the start of the experiment, even before the molt to the next instar. For all treatments the death rate was greater for immature forms. These findings may provide a useful beginning for the development of biopesticides. Further studies will be carried out on mating, fecundity and proteolytic activity.Digital Object Identifier http://dx.doi.org/10.3923/je.2012.98.106
机译：由于各种虫害的侵袭，不同作物的产量损失是一个世界性的问题。吸食类型 Dysdercus maurus 对许多农作物造成损害。为了鉴定对经济上重要的害虫具有杀虫活性的活性成分，已经研究了多种植物。为了验证蒲龙1864（Euphorbiaceae）的草皮和粗树脂对遥远的Dysdercus maurus 1i（Hemiptera：Pyrrhocoridae），甲醇（EMeOH）的杀虫活性。将提取物，二氯甲烷级分（FDM），乙酸乙酯级分（FAE）和粗树脂用微型施药器局部涂抹在三龄若虫中胸区的背侧和成虫的腹侧，并掺入人工饲料中。分别用0.5％，1.0％和2.0％的上述提取物局部治疗的Dysdercus maurus的成人平均死亡率明显高于对照组。 FAE具有很高的杀虫潜力，死亡率更高，延长了幼虫阶段的持续时间，并导致畸形的成虫。在实验开始后三天，甚至在蜕皮到下一个龄期之前，用含1％FAE人工种子喂养的三龄若虫就死了。对于所有治疗，未成熟形式的死亡率更高。这些发现可能为生物农药的开发提供有用的开始。将进一步研究交配，繁殖力和蛋白水解活性。数字对象标识符http://dx.doi.org/10.3923/je.2012.98.106

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