Parasitoid Trichogrammatoidea armigera NAGARAJA Sebagai Agen Pengendali Hama Secara Hayati dan Teknik Pembiakannya
Biological control is an effort to suppress the pest population at levels below those causing economic injury, using the natural enemies or antagonist agents. Insect parasitoid is one of the natural enemies that often used to control the insect pests. The insect parasitoids as other natural enemies should be propagated before they are introduced into the area where the pest occurs. To maintain the efficiency of mass rearing program, the alternative hosts mostly used in laboratory for propagating the parasitoids. However, one of the obstacle factors in using of the alternative hosts is the stock of suitable host often insufficiently available in laboratory. The purpose of this study was to investigate the effect of host age on host preference and host suitability for egg parasitoid, Trichogrammatoidea armigera. In this study, Corcyra cephalonica eggs were used as alternative host. The result showed that the host age affects on host preference and host suitability. Female T. armigera prefer younger host (0-1 d) than the older ones. The percentage of parasitism on 0 and 1 day old hosts was 90% and 83%, respectively, while on 3 day old host the percentage of parasitism was 33%. The percentage of adult progeny produced was 113%, 95%, 62% and 26% for host eggs 0, 1, 2 and 3 d of age, respectively. These result suggested that the eficiency of T. armigera mass-rearing programs can be increased when the availability of a sufficient number of young host can be maintained in the laboratory.
Trichogrammatoidea armigera; host preference; host suitability; mass-rearing
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