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草蛉是农、林、果、蔬害虫的重要天敌,它具有分布广、繁殖力强等特点,很有利用前途。但是,由于草蛉黑卵蜂Telenomus acrobates以及其它因子的作用,致使草蛉在自然界的种群数量一直不能得到充分的增殖。根据我们调查,在湖北省该蜂对草蛉卵的寄生率平均在30%左右,其中以大草蛉卵的寄生率较高,最多可达80%以上。为此,我们从1976年开始对此蜂开展了研究,力图模清它的习性和发生规律,以便达到控制其数量,为保护利用草蛉提供依据。现将该蜂的有关生物学特性整理于后。一、历期(一)方法从田间采回被寄生的草蛉卵,放在指管内待羽化后,以15%浓度的蜂蜜,作为补充营养,多头混在一起让其充分交尾,然后接入大草蛉的新鲜卵粒,在25℃左右的温度下让其寄生8小时后,取出大草蛉卵粒,单粒投入10×2毫米的玻璃指管
Grass mulberry is an important natural enemy of agriculture, forestry, fruit, pests and insects, it has a wide distribution, fertility and other characteristics, it is a good use of the future. However, due to the effects of Telenomus acrobates and other factors, the population of natural turf in the world has not been able to fully proliferate. According to our investigation, the parasitism rate of the bees in Hubei province is about 30% on average, of which the parasitism rate of the eggs of the big grasshoppers is high, up to 80% or more. For this reason, we started to study the bee in 1976 in an effort to clarify its habits and laws in order to control its population and provide a basis for the protection and utilization of grass weeds. Now the bee related biological characteristics after finishing. First, the duration of (a) method from the field to retrieve parasitic grass eggs, on the tube to be feathered, with 15% concentration of honey, as a supplementary nutrition, long mixed with full copulation, and then access the grass蛉 fresh eggs, at temperatures around 25 ℃ let parasitism 8 hours later, remove the eggs of the big grass,, single into 10 × 2 mm glass vial