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分别采用田间自然危害,人工接虫和模拟危害的方法,就棉田二、三、四代中黑盲蝽(Adelphocoris suluralis Jak.)的危害损失和经济损害允许水平进行了研究。结果得出:①二代中黑盲蝽的危害,不至于造成棉花产量损失。②三代中黑盲蝽危害所造成的产量损失随虫口密度呈不对称S形增长,其损失率概率单位(P)与虫口密度(x)的数学模型为:P=5.72301gx-4.3561。最大损失量为10.43kg/亩。③四代中黑盲蝽的危害损失随虫口密度的增加而增加。④三、四代中黑盲蝽的经济损害允许水平分别为百株虫量27头和37头。
The damage and economic damage of Adelphocoris suluralis Jak. In the second, third and fourth generations of cotton field were studied by natural hazards, artificial insects and simulated hazards respectively. The results obtained: ① the second generation of black bugs harm, will not result in cotton yield loss. (2) The yield loss caused by the damage of Nystagmus herostris in three generations showed an asymmetric S-shaped growth with insect population density. The mathematical model of the probability unit (P) of loss rate and population density (x) was P = 5.72301gx-4.3561. The maximum loss is 10.43kg / mu. ③ The harm loss of Apis mellosis in four generations increased with the increase of insect population density. ④ three or four generations of Apinea economic damage allowable levels were 100 and insect population 27 and 37.