Host-Parasitoid Interaction Between Chilo partellus ( Swinhoe )

The effect of different parasltold-host ratios on the massmuitiplicatlon of _ gregarious . ectoparasltold, Allorhogas' pyraUJplulguB, Marsh was lavestlgated. One parasitold : one host was found. to be the optimum ratio lor '. multiplying the parasitofd on ChilD parteU"S (Swlnhoe) as Itr'esulted In the productlon.of maximum number of cocoons and healthy adults, besides providing_ high per cent parasitism.' ..