论文部分内容阅读
随着林木逐年长高 ,林业上利用人工放蜂的方法已适应不了防治森林害虫的要求。笔者研制出一种半球形菊花状的放蜂包 ,采用飞机释放防治松毛虫。试验表明 ,此形状的蜂包具有科学性和实用性。飞机放蜂的寄生效果与蜂包着树率的高低、飞机撒播的密度、松树的密度及针叶保存率等存在直接关系 ;飞机每 6 6 7m2 放蜂量比人工放蜂减少 2 /3,且不影响寄生率 ,大大节约生产成本
With the growth of trees year by year, the method of using artificial beekeeping in forestry has not been able to meet the requirements of preventing and controlling forest pests. The author developed a hemispherical chrysanthemum-like bee-keeping package, using the plane to release the control of pine caterpillars. Experiments show that the shape of the bee package is scientific and practical. The parasitic effect of the bee-keeping bee is directly related to the height of the bee-encrusted tree, the density of the airborne seeding, the density of the pine tree, and the preservation rate of the needles. The amount of bee-eaters per 6 6 7m 2 is 2/3 less than that of artificial bee- And does not affect the parasitic rate, greatly saving production costs