This armyworm is generally seen America and other countries. Recently, this pest is observed first in Karnataka in August, 2018 and later on in other states also. The infestation of this caterpillar is also seen in Gujarat also. At present, this armyworm is reported only on maize crop but near future, it may attack in other crops also. Hence, to know the identification and management is prime requirement and important. It is very easy to identify this caterpillars. The larva is brown in colour, dark pimple like spots with hairs on dorsal side on each segment of the body, four dark spots forming a square on the second-to-last body segment and has a dark head with pale, upside-down Y-shape on the front of the head and white patch on front wing of male moth. Larval stage is about 12 to 20 days. This polyphagous pest lay their eggs on lower surface of the leaf in bunch covering with silken thread. Young larva scrap the epidermal layer of the leaf and feed chlorophyll contents. Bigger larvae feed on leaves by making uneven shot holes on the leaf and also enter into the cob and feed the developing grains. Saw-dust like excreta is seen near the leaf whorl. This caterpillar can do the damage 34 to 50% to the maize crop.