马鞭草科多花牡荆和桃金娘科密花管花木提取物及分离化合物对草地贪夜蛾（鳞翅目：夜蛾科）的生物活性
Bioactivity of extracts and isolated compounds from Vitex polygama (Verbenaceae) and Siphoneugena densiflora (Myrtaceae) against Spodoptera frugiperda (Lepidoptera: Noctuidae).
作者信息
Gallo Margareth B C, Rocha Waldireny C, da Cunha Uemerson S, Diogo Fernanda A, da Silva Fernando C, Vieira Paulo C, Vendramim José D, Fernandes João B, da Silva M Fátima das G F, Batista-Pereira Luciane G
机构信息
Departamento de Química, Universidade Federal de São Carlos (UFSCar), CP 676, 13565-905, São Carlos-SP, Brazil.
出版信息
Pest Manag Sci. 2006 Nov;62(11):1072-81. doi: 10.1002/ps.1278.
The effects of crude extracts, fractions and isolated compounds from Vitex polygama Cham. and Siphoneugena densiflora Berg were evaluated on the development of Spodoptera frugiperda JE Smith, a destructive insect pest of corn and several other crops. The extracts and fractions were incorporated into an artificial diet at 1 mg g(-1) and offered to the insect during its larval stage. Length and viability of larval and pupal stages as well as pupal weight were assessed. Isolated compounds were tested through superficial contamination of the diet at 0.1 mg g(-1). Weight and viability of ten-day-old larvae were determined. Methanolic and hydroalcoholic S. densiflora extracts caused 100% larval mortality, while leaf and fruit hydroalcoholic extracts from V. polygama were the most active. Among the isolated compounds, flavonoids presented the best insecticidal results, and tannins the best larval growth inhibition.
对多花牡荆（Vitex polygama Cham.）和密花管花木（Siphoneugena densiflora Berg）的粗提物、馏分及分离出的化合物进行了评估，观察其对草地贪夜蛾（Spodoptera frugiperda JE Smith）生长发育的影响，草地贪夜蛾是玉米和其他几种作物的一种毁灭性害虫。将提取物和馏分以1 mg g⁻¹ 的浓度掺入人工饲料中，并在幼虫阶段提供给昆虫。评估幼虫和蛹期的长度、活力以及蛹重。通过以0.1 mg g⁻¹ 的浓度对饲料进行表面污染来测试分离出的化合物。测定10日龄幼虫的体重和活力。密花管花木的甲醇提取物和水醇提取物导致100% 的幼虫死亡率，而多花牡荆的叶和果实水醇提取物活性最高。在分离出的化合物中，黄酮类化合物表现出最佳的杀虫效果，而单宁表现出最佳的幼虫生长抑制效果。
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