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大豆根潜蝇在我国主要分布在东北三省、内蒙古、河北、山东及山西等地,其中以黑龙江省等地尤为普遍。主要在大豆苗期进行危害,幼虫在大豆苗根部皮层和木质部钻蛀危害,造成根皮层腐烂,形成条状伤痕,导致大豆根系受损伤而不能正常生长和吸收土壤中的各种营养成分。2015年黑龙江省克山县大豆根潜蝇普遍发生,为了探求该虫害发生程度与前茬作物关系,同时初步统计该虫害发生程度。本研究在黑龙江省克山县大豆育种示范田进行,前茬作物分别为大豆、马铃薯、小麦,采用棋盘式取样法进行调查。结果显示:前茬为大豆的地块大豆根潜蝇发生程度最重,其次是前茬为马铃薯茬的田块,侵入率最低的是前茬为小麦茬地块。在调查所有的大豆株系中平均根潜蝇侵染率为66%,调查地块每平方米蛹的数量为21头,基本属于大发生。
Soybean leafminers are mainly distributed in China’s three northeastern provinces, Inner Mongolia, Hebei, Shandong and Shanxi, among which Heilongjiang Province is the most common. Mainly in soybean seedling damage, larvae in the roots of soybean seedlings cortical and xylem boring harm, causing the root cortex decay, the formation of stripe wounds, resulting in damage to the roots of soybean can not grow and normal absorption of various nutrients in the soil. In 2015, the soybean root-snakehead occurred in Keshan County, Heilongjiang Province. In order to explore the relationship between the occurrence of the pest and the crop of the previous crop, the incidence of the pest was also preliminary surveyed. The study was conducted in the Keshan soybean breeding demonstration field in Keshan County, Heilongjiang Province. The former crop was soybean, potato and wheat and the other was investigated by checkerboard sampling method. The results showed that the former soybean crop plots had the highest degree of occurrence, the second was the plots with stubble before the stubble, and the stubble with the lowest stubble was the stubble with wheat stubble. In the investigation of all soybean lines, the average infection rate of root miner was 66%. The number of pupae per square meter in the survey plots was 21, which basically belonged to large occurrence.