Achanakmar-Amarkantak biosphere reserve is a paradise of floral and faunal diversity, located in Chhattisgarh and Madhya Pradesh. Recent survey conducted in this biosphere reserve during the rainy season (August-October 2012), revealed the occurrence of defoliator, Botyodes asialis Guen. (Lepidoptera: Pyralidae), severely damaging Casearia tomentosa Roxb. (family Samidaceae). This is the first record of occurrence of this insect in Achanakmar-Amarkantak biosphere reserve. Some observations on the growth and development of this potential defoliator were recorded.