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1972年,我们三个单位进行协作,在新丰县开展了啮小蜂的试验研究,取得了初步效果。1973年,又进一步采取人工小量繁殖和田间自然繁殖扩散相结合的方法进行试验,对防治晚造较大面积的三化螟为害取得了显著效果。一、啮小蜂对三化螟卵的寄生效能啮小蜂是三化螟卵的一种卵寄生蜂。雌蜂产卵于三化螟卵内,幼虫营寄生兼捕食生活。一头幼虫一生能吃3-5粒螟卵。一块三化螟卵一般有80-100粒卵,只要有一头啮小蜂,产下20粒左右蜂卵,孵出幼虫后便可把整块三化螟卵吃掉,因此它是一种防治三化螟较理想的卵寄生蜂。二、啮小蜂人工小量繁殖散放,在田间自然繁殖扩散,对防治大面积三化螟的效果我们根据啮小蜂蜂体较大,飞迁扩散能力较强,以及第三代三化螟蛾发生期长、发生量大的特点,在城郊公社5个大队3,500亩晚造稻田试验区中,按1％的比例,设置早插本田共63个点(每点1-2块)46亩,
In 1972, our three units collaborated to carry out experimental research on the bee-pollinating bee in Xinfeng County, and achieved initial results. In 1973, the experiment was further carried out by means of a combination of artificial small-scale reproduction and natural reproduction and diffusion in the field, and achieved remarkable results in the prevention and control of the damage caused by the large-area Borer in late rice. First, the small bee on the parasitic effect of the three rice borer eggs is a small bee is eggshell borer of an egg parasitic wasp. The female bee spawns in three borer eggs, larvae camp parasitic and predatory life. A larvae eat 3-5 grain borer eggs for life. A piece of rice stem borer eggs are generally 80-100 eggs, as long as there is a bee, feeding 20 bee eggs, hatch larvae after the entire borer eggs can be eaten so it is a kind of control Borer more ideal egg parasitic wasp. Second, small bees nest artificial breeding small amount of natural propagation in the field of proliferation, the effect of the prevention and treatment of a large area of the Yellow River borer, according to our bee small bees, flying strong proliferation ability, and the third generation of the three Occurrence of long-term moth, the occurrence of a large amount of characteristics in suburban communes 5 brigade 3,500 acres of late-made rice experimental area, according to the proportion of 1%, setting up early Honda a total of 63 points (1-2 points) 46 mu,