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我省利用大红瓢虫、澳洲瓢虫防治吹绵蚧已有20余年历史。由于防治效果好,投资小,不污染环境,广大果产区群众纷纷反映,这是一个费省效宏的好办法。 两种瓢虫在我省的适应温度范围较狭。大红瓢虫的有效利用期为5—9月,澳洲瓢虫为3—11月。每年冬季和早春温度较低,影响瓢虫生长发育,且易引起死亡。在自然温度下,从田间收回室内饲养的大红瓢虫,从3月份起死亡剧增;澳洲瓢虫从11月到次年2月死亡率
Red ladybugs in our province use red, ladybugs in Australia to control blowing cotton Kuwana more than 20 years of history. As a result of good prevention and control, small investment, no pollution of the environment, the majority of fruit producing areas have been reflected by the masses, which is a good way to save energy efficiency macro. Two ladybugs in our province to adapt to a narrow temperature range. Effective use of red ladybug from May to September, the Australian ladybug from March to November. The annual winter and early spring temperatures are lower, affecting ladybug growth and development, and easy to cause death. At natural temperatures, the red ladybugs indoors fed back from the fields have experienced a dramatic increase in deaths from March; the mortality rate of ladybugs in Australia from November to February next year