论文部分内容阅读
赤松毛虫质型多角体病毒,自1977年从山东引进后,经多次试验,按多角体用量500—1000亿/亩,地面喷雾防治马尾松毛虫、赤松毛虫都有较好的防效.惟林区缺乏水源,大面积地面喷雾十分困难.1982年我们进行了少量的粉剂试制工作,制剂并作了林间杀虫试验.现将初步结果整理于下.一、粉剂试制1.先采集并饲养松毛虫幼虫,经人工感染后,收集病死虫,用组织捣碎机将虫体捣烂,加无菌水稀释过滤,滤波经沉淀器离心分离,沉淀物即为多角体病毒粗提物,加适量无菌水稀释取样测定含量后,置冰箱备用.2.填充剂选用白陶土,它具有质轻、价廉、来源广等优点.从矿山购得的陶土粉潮湿(含水率5%左右),粉粒大小不均,须经干燥、过筛(180目),并及时装
Dendrolimus cytoplasm polyhedrosis virus, introduced from Shandong in 1977, after repeated tests, according to the amount of polyhedron 500-1000 million / mu, ground spray control Dendrolimus punctatus, red caterpillar have better control effect. However, Forest areas lack of water, large area ground spray is very difficult .1982 we conducted a small amount of powder trial work, preparations and forest insecticide test. Now the preliminary results are arranged in the next. Reared moth larvae, the artificial infection, the collection of diseased insects, with a tissue smash the parasites smashed, add sterile water dilution filtration, centrifugation by precipitator filter, the precipitate is polyhedrosis virus crude extract, Add proper amount of sterilized water diluted sample content measured, set the refrigerator spare .2 fillers use white clay, it has the advantages of light weight, low cost, wide source of origin, etc. Clay powder purchased from the mine is moist (moisture content of about 5% ), Uneven size of powder, to be dried, sifted (180 mesh), and fashion