你确定你地里的虫子是rootworm? 网上找到这篇 http://ento.psu.edu/extension/factsheets/corn-rootworm 在Management Strategies里说,rootworm是无法在阔叶植物的根上活下去的。按说, 对南瓜,zucchini没害啊。 In the larval stage, neither rootworm species is known to survive on broadleaf plants. When corn is rotated to alfalfa, red clover, soybeans, or any other legume, the majority of rootworm larvae die from starvation within one year.