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首页> 外文期刊>Current Science: A Fortnightly Journal of Research >Bioinsecticide from swallowroot (Decalepis hamiltonii) Wight & Arn protects food grains against insect infestation
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Bioinsecticide from swallowroot (Decalepis hamiltonii) Wight & Arn protects food grains against insect infestation

机译：燕子（Decalepis hamiltonii）中的生物杀虫剂Wight＆Arn保护食品谷物免受昆虫侵害

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摘要

The insecticidal activity of D. hamiltonii roots was tested against the grain pests Sitophilus oryzae, Rhyzopertha dominica and Tribolium castaneum. Wheat grains were mixed with 5 and 10% air-dried root powder and infested with S. oryzae. The treatments achieved 96 and 100% mortality, respectively, and no progeny emerged from either treatment. Against R. dominica, the 5 and 10% treatments achieved 86 and 100% mortality. The progeny emerged per adult day was 0.004 and 0.000, respectively, compared to 0.280 in the control. The volatile fraction was mainly composed of 2-hydroxy-4-methoxybenzaldehyde (HMB). In terms of contact toxicity, T. castaneum was highly susceptible to HMB, with ED50 (effective deposit) and ED95 values of 1.64 and 6.24μg/cm2, respectively. S. oryzae was least susceptible of the 3 pests. Vapour toxicity against S. oryzae was not observed. Whole grains treated with powdered root and extracts did not show any fungal infestation and retained their germination capacity after 3 years in storage, whereas control samples were completely destroyed after 6 months.
机译：测试了D. hamiltonii根的杀虫活性对谷类害虫Sitophilus oryzae，Rhyzopertha dominica和Tribolium castaneum的杀虫活性。将小麦籽粒与5％和10％的风干根粉混合，并用米曲霉侵染。这些处理分别达到96％和100％的死亡率，并且两种处理均未出现子代。针对多米尼加罗非鱼，5％和10％的治疗死亡率达到86％和100％。每个成年日出现的后代分别为0.004和0.000，而对照组为0.280。挥发性部分主要由2-羟基-4-甲氧基苯甲醛（HMB）组成。就接触毒性而言，锥栗对HMB高度敏感，ED50（有效沉积）和ED95值分别为1.64和6.24μg/ cm2。米曲霉对这三种害虫最不敏感。没有观察到针对米曲霉的蒸气毒性。用粉状根和提取物处理的全谷物在储存3年后未显示任何真菌侵染并保持了萌发能力，而对照样品在6个月后被完全破坏。

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