金龟子是森林苗圃的一类主要地下害虫,主要危害落叶松、红皮云杉、樟子松、杨、柳、榆等多种针阔叶树。东北大黑鳃金龟Holotrichia diomphalia Bates为东北地区的优势种,每年5月中旬至7月中旬和8月下旬至9月下旬为两次为害高峰,许多地方造成严重的经济损失。用3%呋喃丹颗粒剂、5%辛硫磷乳油、2%倍硫磷颗粒剂、50%甲拌磷颗粒剂等农药防治,效果较好。 Scarab is a kind of main underground pests in forest nursery. It mainly damages many coniferous and deciduous trees such as larch, red spruce, Pinus sylvestris, poplar, willow and elm. Holotrichia diomphalia Bates is the dominant species in northeastern China. It reaches the peak twice in mid-May, mid-July, late August and late September, and causes serious economic losses in many places. With 3% carbofuran granules, 5% phoxim EC, 2% fenthin granules, 50% phorate pesticides and other pesticides control, the effect is better.