Grub Worm Identification and treatment. Grub Worms or more specifically; white grubs are the larvae of scarab beetles. The grubs of economic importance in Texas are those of the Japanese beetle, the green June beetle (June Bug), the southern masked chafer, the northern masked chafer, and the Asiatic garden beetle. Several other Grub Worm species, such as May beetles and June beetles, are also present but usually in low numbers. The Japanese beetle is consistently the most damaging grub worm in this state, Texas. Imidicloprid, or the brand name Merit.
All these grubs have cream colored bodies with yellow to brownish heads, brownish hind parts, and six legs. Mature grubs vary in length from 1/4 to 11/2 inches, depending on the species. White grubs usually lie in a curled or Cshaped position.
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