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为制定小云斑鳃金龟及其它蛴螬的防治指标提供依据,我们进行了小云斑鳃金龟为害春小麦损失率的测定工作。一、材料与方法:方法为网室分区测定法。网室高2米,宽8米,长32米。小麦播种前安好钢架,拔节前架好尼龙网防鸟害。网室内设置小区,每小区长1.11米,宽0.9米,面积1平方米,底层及四周铺砖,各小区前后左右均用细铁纱网隔开,隔离深度60厘米。供试品种为陇春11号。播种前翻土,仔细查找、汰除冬蛰的各种有害生物,特别是蝼蛄、金针虫等,并进行表土掺混,使各小区土壤基本一致。播种亩播量按30万粒计,合每平方米450粒,每小区种4行,每行113粒。3月16日播种,小锄开沟,播后覆土盖平。采虫三月份于临洮县结合越冬密度调查进行采虫,经逐头鉴定确定虫种和龄期后,按每瓶1头装入盛有湿润细土的罐头瓶内,并注明龄期带回兰州。接虫根据田间调查,模拟小云斑鳃金龟越冬幼虫上升到耕土层为害作物时,于5
In order to provide the basis for making the control index of Scylla serrata and other scabies, we carried out the determination of the loss rate of spring wheat damaged by Sciolophus cuticulata. First, the material and methods: Method for the net room partition method. Mesh high 2 meters, 8 meters wide, 32 meters long. Wheat sowing before the good steel frame, good nylon frame before jointing prevent birdwatching. Network indoor settings area, each cell length 1.11 meters, 0.9 meters wide, an area of 1 square meters, the bottom and surrounding paving, the district around with fine iron gauze, isolation depth of 60 cm. Test varieties for the Longchun 11th. Soil before sowing, carefully looking for the removal of winter sting all kinds of pests, especially catfish, insects and other insects, and mixed with topsoil, so that the community basically the same soil. Sowing acres of sowing by 300000, totaling 450 grains per square meter, each plot 4 lines, 113 lines per line. March 16 sowing, small hoe ditching, sowing Tu cover flat. Mining insects in Linyi County in March combined with the winter density survey of insects, identified by identification after the first identification of insects and age, according to a bottle per bottle filled with moist fine soil canned bottles, and indicate the age band Back to Lanzhou. According to the field survey, we simulated that the overwintering larvae of Calamagrostis angustifolia climbed up to the topsoil,