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我们于1973-1974年进行了马尾松毛虫(Dendrolimus punctatus Walker)性外激素粗提物的提取和应用的研究。试验表明,马尾松毛虫性外激素对雄蛾具有一定强度的活性。为进一步田间应用,于1975-1976年又在衡东县永宁大队,进行了田间诱杀法试验。试验林地是一个孤立山头上的松林,面积约20亩,林龄8-10年左右,每亩100株,郁闭度0.6左右。林地东、南、西三面有田垄相隔,北面是杉木和阔叶林。为了和外界隔离,在每世代试验开始时,四面相对松林及阔叶林内均设三层诱捕器作防护带。老熟幼虫结茧后,成虫羽化前进行仔细的虫口密度(茧/株)、雌雄比和蛹期寄生死亡率的调查。然后要推算雄蛾羽化总数。为了掌握羽化始期,在试验林地林缘及林中,设少
We carried out from 1973 to 1974 the Dendrolimus punctatus Walker sex pheromone extract and application of research. Experiments show that the Masson pine caterpillar sex hormone has a certain degree of male moth activity. For further field application, in 1975-1976 again in Hengdong County Yongning unit, conducted a field trapping kill test. The experimental forest is a pine forest on an isolated hill with an area of about 20 mu and a forest age of about 8-10 years with 100 plants per mu and a canopy density of about 0.6. Woodland east, south and west on three sides separated by ridge, the north is fir and broadleaf forest. In order to isolate with the outside world, at the beginning of each generation test, three layers of traps are used as guard bands in the four opposite pine forests and broad-leaved forests. After mature larvae cocoon, adults were carefully surveyed for population density (cocoon / plant), male-female ratio and parasitological mortality in pupae before eclosion. And then to calculate the total male emergence. In order to grasp the eclosion period, in the experimental forest edge and forest, set less