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选用七种植物提取物,分别设置800ppm、400ppm、200ppm、100ppm、50ppm五个浓度梯度,对赤拟谷盗进行试验。结果表明,对赤拟谷盗种群形成抑制效果最好的是800ppm的桔皮提取物,抑制率为93.4％;其次是800ppm的脐橙提取物,抑制率为85.7％。800ppm的一年蓬花瓣、肉桂、艾蒿、山柰、鱼腥草提取物对赤拟谷盗种群形成抑制率依次为78.1％、76.4％、74.4％、67.8％、54.3％。在同种植物提取物的五个浓度梯度中,以最高浓度800ppm的抑制效果最好。在试验剂量范围内,桔皮、脐橙、肉桂、山柰、艾蒿、鱼腥草的提取物对赤拟谷盗成虫和幼虫都有不同程度的驱避作用。七种植物提取物对赤拟谷盗成虫和幼虫均未表现明显的触杀作用。
Seven kinds of plant extracts were selected, and five concentration gradients of 800ppm, 400ppm, 200ppm, 100ppm and 50ppm were respectively set to test the plant. The results showed that 800 ppm orange peel extract had the best inhibitory rate of 93.4%, followed by 800 ppm navel orange extract with the inhibition rate of 85.7%. The inhibitory rate of 800ppm annual Puff petal, Cinnamon, Artemisia, Yamadera and Houttuynia were 78.1%, 76.4%, 74.4%, 67.8% and 54.3%, respectively. Among the five concentration gradients of the same plant extract, the highest inhibitory effect of 800 ppm was the best. In the experimental dose range, the extract of orange peel, navel orange, cinnamon, razor clam, mugwort and houttuynia had repellent to some extent to adults and larvae of Brassica parachinensis. Seven plant extracts showed no obvious contact action on adults and larvae.