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节节麦是我国进境植物检疫性有害生物,在20世纪90年代入侵山西,2006年在山西南部麦区发生危害。为经济有效指导农民开展防除,我们采取数理统计和经济阈值计算方法,开展了节节麦危害小麦损失率和防治指标的研究。结果表明,在单位面积上随着节节麦数量的增加,小麦产量逐渐下降。小麦产量损失率(%)与节节麦密度(株/m2)的回归模型为Y=0.2426e0.000014/x。在山西不同小麦产量生产水平和90%防治水平下的节节麦防治指标为:平川水浇地麦田节节麦为12株/m2,扩浇地麦田节节麦为16株/m2,旱地麦田节节麦为21株/m2;在80%防治水平下的节节麦防治指标为:平川水浇地麦田节节麦为14株/m2,扩浇地麦田节节麦为18株/m2,旱地麦田节节麦为23株/m2。
Festival of wheat is China’s quarantine pests of plant origin, invasion of Shanxi in the 1990s, in 2006 in the wheat area of southern Shanxi harm. In order to economically and effectively guide peasants in their prevention and control, we adopted the methods of mathematical statistics and economic thresholds to carry out the research on the loss rate of wheat and the prevention and control indicators. The results showed that the yield of wheat decreased gradually with the increase of nodal number per unit area. The regression model of wheat yield loss (%) and nodule density (strain / m2) was Y = 0.2426e0.000014 / x. The control indexes of Artemia niloticum under different wheat production levels and 90% control level in Shanxi are: 12 plants / m2 in wheat field in Pingchuan irrigated field, 16 plants / m2 in wheat field in expanding irrigation area, Sectional wheat was 21 / m2; Control measures for nocturnal nystagmus under 80% control level were: 14 plants / m2 in wheat field in Pingchuan irrigated field, 18 plants / m2 in wheat field in expanding irrigation area, Dry wheat field wheat festival 23 strains / m2.