利用蓖麻叶诱杀金龟子,过去常见于书刊,近年来则有用以综合防治措施的。其效果如何,是值得探讨的问题。现将我们的调查研究结果简述于下。 (一)食性问题 利用蓖麻诱杀金龟子,应首先弄清食性问题。1977年,当东北大黑金龟子 Holotrichia diomphalia Bates在吉林公主岭由越冬场所向豆田大量迁移活动时,我们从5月下旬至6月上旬进行了3—4次调查,在蓖麻田内平均每百平方米迁来0.3头,在邻近的大豆田内则平均为2.4头,二者相差达8倍之多。过去我们曾在黑龙江省呼兰等地调查,发现该成虫嗜食大豆、甜菜、榆树等植物。这说明该成虫食性广,在一般条件下蓖 The use of castor leaves to decorate beetles, used to be common in books and periodicals, in recent years is useful for comprehensive prevention and control measures. Its effect is worth exploring. Now the results of our investigation is summarized below. (A) feeding problems Use castor to decoy beetles, should first find out the food problem. In 1977, when Holotrichia diomphalia Bates, a large black-toothed beetle in northeastern China, migrated a large amount from winter to winter in Gongzhuling, Jilin Province, we conducted 3-4 surveys from late May to early June with an average of 100 square meters Moved to 0.3, while in the adjacent soybean fields, the average was 2.4, a difference of up to 8 times. In the past, we surveyed Hulan in Heilongjiang Province and other places and found that the adults fed on plants such as soybeans, sugar beets and elms. This shows that the adults eat fast, under general conditions grate