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自从1955年湖北省农科院发现红铃虫金小蜂(又名黑青小蜂,以下简称金小蜂)能防治在棉花仓库里越冬的红铃虫后,1960年已在全国12个省、市主要棉区推广,防效高,无污染,受到广大棉农的欢迎,对保证棉花丰产起着重大作用。由于金小蜂繁殖最适宜的温度为18—22℃,温度过高则产卵少,甚至不产卵。同时,金小蜂的寄主红铃虫在6月间大部化蛹,饲料来源成了问题,长期以来只好采用“冷藏保种法”,即将金小蜂的老熟幼虫或初蛹在5月间放进冰箱,抑制其育发,迫使休眠。经过夏、秋,直至秋末冬初气温渐低,当年红铃虫进入越冬阶段,再行繁殖,为明年放蜂作好准备(目前仍由上海市郊区植保站和武汉市汉川县植保站负责“冷藏保种”,等秋后供各地应用)。这就显然大大影响了生物防治的规模和作用,不能适应发展棉花生产的需要。而且在自然环境中,并无冰箱冷藏,金小蜂
Since 1955, Hubei Academy of Agricultural Sciences found that the red bellied golden bee (also known as black beetle, hereinafter referred to as golden bee) can control cotton bolls in winter wintering red bollworm in 1960, has been in the country’s 12 provinces The promotion of major cotton areas in the city is highly effective and pollution-free. It is welcomed by the majority of cotton farmers and plays a significant role in ensuring the cotton yield. As golden bee breeding the most appropriate temperature is 18-22 ℃, the temperature is too high spawning less, or even spawning. At the same time, the golden beetle host pink bollworm most pupa in June, the source of the feed has become a problem, had long had to use the “cold preservation seedling method”, the golden beetle mature larvae or pupae in May Between the refrigerator, inhibit their hair growth, forcing sleep. After the summer and autumn until the end of autumn and early winter, the temperature gradually decreased. In the same year, the red bollworm entered the overwintering stage and re-propagated to prepare for bee-feeding next year (currently still under the responsibility of the Shanghai Suburban Plant Protection Station and Wuhan Hanchuan Plant Protection Station “Refrigeration seed storage”, so autumn after the application). This obviously affects the scale and effect of biological control greatly and can not meet the need of developing cotton production. And in the natural environment, no refrigerators, gold little bees