none The graminaceous weed, Coix lachryma-jobi , which grows along with sugarcane and in fallow lands, is an important host of the polyphagous stem borer, Chilo partellus in Uttar Pradesh (India). In November, the borer builds up high populations on C. lachryma-jobi and undergoes hibernation in it. Apanteles flavipes kills 90.57% and 100% hibernating larvae of C. partellus in C. lachryma-jobi in three to four months from November to February. While 50% larvae of Chilo auricilius present in C. lachryma-jobi are parasitised by A. flavipes , it does not contribute significantly to suppress the population of C. auricilius in sugarcane, suggesting that sugarcane is not a preferred habitat of A. flavipes in India.