Southern and Northern Masked Chafer Grubs. He also points out that if you’ve got a thatch layer of more than three-quarters of an inch, it’s going to be nearly impossible to get the chemical to where it’s needed. The Japanese Beetleâs grub has a V-shaped raster pattern. A grub has three pairs of well-developed legs that are located laterally on the body, just below the grubâs head. Because of this, itâs far easier to notice the damage that 2nd and 3rd instar grubs cause to a lawn. If you have grubs you can easily pull up the turf like carpet because all the roots are gone and you also might see skunk, raccoon and bird damage where they have tried to eat the grubs. The only way to tell the difference at the grub stage is by looking at the hairy projections on the grub’s “raster” (grub-speak for “butt”). Rescue treatments are “wait-and-see” if you have grubs type of application. Milky-spore disease is an organic granular product that’s harmless to birds, pets and people but deadly to Japanese beetle grubs – supposedly for 10 or more years with one application. A white grubâs tail end appears black or dark brown because the grub ingests soil as it feeds. A grubâs life cycle ends when an adult beetle reaches maturity. The damage caused by grubs may vary in extent and severity, from minor and barely noticeable to severe. Grubs are dirty white, soft bodied, and robust with a brown head and six well-developed legs, with exception of green June beetle grubs, which do not have well-developed legs. Grubs are sneaky. Each time it molts, the grub grows in size and subsequently its food consumption increases. As a full-service lawn provider, we take care of any problem you are having with your grass, trees or landscaping, as well as handle regular mowing and seasonal cleanups. They have six legs and a dark-tinted abdomen due to soil particles showing through their exoskeleton. But if you’re using the milky-spore approach, that product is effective on Japanese beetle grubs but not masked chafer grubs. Japanese beetle grubs have V-shaped hair patterns while masked chafers have no pattern. There’s no way to tell when they invade your lawn, because they do their dirty work underground where you can’t see them. This is why preventative and curative control is needed - coming in the form of an effective grub control treatment. Itâs unlikely that a small number of grubs will do much harm to your lawn. Damage from fall armyworms is uniform across a large area and results in bare spots in a lawn. Lastly, even if one does not eat crabgrass seeds, it can be gotten rid of by mowing techniques. Bosold says it’s about 50 percent effective in the first spring but becomes more effective if two applications are used each year (early spring and late summer). Once those products are watered or rained in, they’ll be in the root zone when the new crop of beetle eggs hatches. They continue to devour all of the grass roots they can reach, growing big and plump, until mid-fall, when they move deeper in the soil for protection against cold winter temperatures. Once this has been accomplished, use a few basic procedures to repair the lawn and prevent grubs from returning the following season. This isnât a simple question to answer, because as any lawn expert will tell you, there are a number of possible culprits. “If you want quick relief from grubs,” he says, “this is not the way to go.”. A beetleâs larva is the grub. White Grub Damage. White grub is a general term for all scarab beetle larvae. A beetleâs larva is the grub. There were even brown patches. to its former beauty. It feeds close to the ground surface, eating grass roots throughout the month of August.