麦吸浆虫是我市小麦生产上一种毁灭性害虫,近年来再度回升猖獗,给小麦生产帶来严重威胁。为了有效地控制该虫的为害,从1987年9月至1989年6月,我们从15个品种中筛选出了抗麦吸浆虫品种——临50744。 经两年的筛选、试验、示范证明该品种: 1.对小麦吸浆虫有很强的抗虫性:在两年中,经多点多次调查,穗被害率、粒被害率和危害损失率均为零。抗虫的原因据解剖镜下观察,该品种的颖壳表面茸毛长且密,这些茸毛由颖壳中心向四周由疏而密分布,靠近护颖边缘的14mm~2内竟有茸毛629根,平均每mm~2有茸毛44.9根;外颖露出护颖部分10.5mm~2内有茸毛324根,平均每mm~2有茸毛30.9根;内颖的边缘(与外颖相结的部分)有一排长、硬且密的毛刷状茸毛,3mm长竟有84根茸毛。另据观测,该品种在抽穗扬花期,外颖稍宽于内颖,护、外颖坚硬且厚,与内 Milkmidt is a devastating pest on wheat production in our city and has been rampant again in recent years and posed a serious threat to wheat production. In order to effectively control the pest damage, from September 1987 to June 1989, we screened from 15 varieties of resistant midgemid species - Pro 50744. After two years of screening, testing and demonstration to prove the variety: 1. Strong resistance to wheat midge insect: In two years, after repeated investigations, the rate of ear damage, grain damage and damage rate Zero. Insect pests According to the anatomical microscopic observation, the variety of the surface of the husky hairy long and dense, hairy from the center of the husky to the sparse and densely distributed by the circumference, near the edge of Ying-Ying 14mm ~ 2 actually 629 hairy, Average per mm ~ 2 have 44.9 hairy; Ying Ying exposed care part of 10.5mm ~ 2 has 324 hair, an average of every hair mm ~ 2 30.9; Ying Ying edge (with Ying Ying part) there is a Pai-long, hard and dense brush-like hair, as long as 3mm long 84 hair. According to another observation, the variety flowering at heading, Ying Ying slightly wider than the Ying, care, foreign Ying hard and thick, and within