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榆树金花虫(Pyrr》aha aeflescens)在江苏省普遍发生,为害严重,我们用白僵菌(刀ea。-veria bassiana Balsamo)进行防治试验取得一定的效果。 试验方法:将榆树金花虫的幼虫与发生僵病的家蚕在培养皿中一起饲养,或直接接种于金花虫虫体上(气温24～30t,相对湿度80～90％)。待金花虫幼体上长出白鹰菌丝时,将金花虫的僵尸磨研,按1:1000倍稀释成水溶液(20斤清水加入人工培养的金花虫白鹰菌纯粉10克),用喷雾器均匀喷布在金花虫幼体群集的榆树枝干上,观察其死亡(率)情况。试验
The common occurrence of Pyrr “aha aeflescens” in Jiangsu Province was very serious, and we achieved some results in the control trials of Beauveria bassiana (ea.-veria bassiana Balsamo). Test Method: The larvae of the goldenrod of the elm and the silkworm that has the stiff disease are kept together in a Petri dish or directly inoculated on the goldenbug insect body (temperature: 24-30t, relative humidity: 80-90%). To be golden pest larvae grow white hawk mycelium, the gold pest worms grinding research, according to 1: 1000 times diluted into an aqueous solution (20 kg of water to join the artificial cultivation of golden pest white eagle white powder 10 grams) , Evenly sprayed on the elm branches of the golden bug larvae cluster with a sprayer to observe the death (rate). test