در شرايط آزمايشگاه SESAMIA پارازيتوييد تخم ساقه خواران جنس HYM:SCELIONIDAE( PLATYTELEMUSHYLASIXON بررسي زيست شناسي و كارايي زنبور

Investigation on Biology and Efficiency of Platytelenomus Hylas Nixon (Hym: Scelionidae), the Egg Parasitoid of Sesamia spp. Under Laboratory Condition

Platytelenomus hylas Nixon is the egg parasitoid of Sesamia spp. Efforts for raultiplication and releasing of the wasp in corn and sugarcane fields for biocontrol purpose of the stem borers (Sesamia spp.) indicate that the wasp has high host specificity. Consequently, the egg of the Sesamia was used for rearing and multiplication of the wasp. The eggs in test tube were exposed to the parasitoid wasps. After parasitising, the host eggs were incubated for undergoing embryonic and immature stage of parasitoid. The emerged wasps were fed by honey syrup and preserved for releasing. The mean number of eggs per female wasp that can be parasitized and host preference of the wasp were determined with and without using olfactometer for two species of the S. cretica and S.nonagrioides. Results show that host eggs are successfully parasitised. The length of growth period was 10.5- 15 and 9.5-13 days in 26± 1 °C and 29± 1°C, respectively. The mean number of eggs that were parasitised per female wasp was 70.8±4.28_ Both methods of host preference experiments show that the wasp preferred eggs of S.cretica to S.nonagrioides .