White grubs are less mature larvae of different species of scarab beetles. These widespread and very destructive pests feed on the roots of the grass on your lawn. The severed roots reduce the ability of the grass to absorb water and nutrients. As a result, the grass becomes brown and eventually dies due to its inability to withstand hot and dry conditions. When the white grubs mature, they cause extensive damage to different types of plants, including trees, shrubs, and vegetables.
Identification of White Grubs
You can identify the insect pests by their appearance and shape. Some signs can show you that white grubs have infested your lawn.
The signs, including gradual yellowing, weakening of the turf, and irregular dead patches, are most evident in August and September. When the damage continues, the dead spots on your lawn may spread, and the healthy sections of your lawn may experience drooping. In some instances, walking over an infested area on your lawn might feel like walking over a sponge. When they extensively damage your lawn, it becomes loose and easy to pull from the soil. Sampling your lawn for possible infestation and early detection of white grub problems can avoid loss of turf and expensive lawn renovations.
Another sign that your lawn has been infested is the presence of raccoons, birds, and moles. However, at times, the predators may be interested in other insects other than the white grubs. Therefore, the best way to identify the presence of white grubs in your lawn is lawn sampling. The process involves inspection of the soil, thatch, and the roots. More than ten white grubs per square foot is an indication of a severe grub problem that brings the need for control.