检测草坪中是否存在金龟子幼虫的方法相对简单直接。[1]挖取深度为3-4英寸、边长12英寸的草皮样本可以确认虫害情况。[1]每平方英尺少于10只金龟子幼虫属于正常水平，无需采取行动；但若达到10只或以上，则需要进行治疗。[1]这些害虫的特征明显，体长约半英寸到1英寸，呈C形，具有棕色头部。[1]
一旦确认金龟子幼虫数量超标，晚夏季节是最佳的防治时期。[1]专家建议采用生物防治方法而非有毒化学药剂。[1]有益线虫（特别是Heterorhabditis bacteriophora菌株）和乳孢芽孢杆菌粉均为有效选择。[1]这些有益线虫利用细菌感染金龟子幼虫，可在48小时内将其杀死。[1]
Homeowners concerned about grub infestations can diagnose the problem by extracting soil samples from their lawn.[1] To conduct a proper inspection, dig out a section of turf measuring 12 inches square and 3 to 4 inches deep.[1] Grubs are typically half an inch to 1 inch in length, C-shaped in appearance, and feature a brown head.[1]
The presence of grubs does not automatically warrant treatment.[1] Fewer than 10 grubs per square foot is considered normal and requires no intervention, while infestations of 10 or more per square foot necessitate action.[1] Late summer is identified as the optimal time to treat grub problems, as the pests are most susceptible to control measures during this period.[1]
For those needing to eliminate grubs, biological control methods offer effective alternatives to toxic chemical pesticides.[1] Beneficial nematodes, particularly the Heterorhabditis bacteriophora strain, are recommended as a treatment option.[1] These nematodes work by infecting grubs with bacteria that kill them within 48 hours.[1] Bacillus thuringiensis powder provides another biological option for grub management.[1]