Interspecific Mating Effect of and on its Fecundity, Survival and Morphologies.

<b>Background and Objective:</b> Worldwide, <i>Bactrocera carambolae</i> and <i>Bactrocera dorsalis</i> are important pests in horticultural commodities. Based on the trapping with methyl eugenol attractant, it was found that the intermediate morphology between <i>B. carambolae</i> and <i>B. dorsalis</i>. This study observed the comparative biology and survivability of the interspecific and intraspecific hybrids <i>B. carambolae</i> and <i>B. dorsalis</i>. <b>Materials and Methods:</b> This study was conducted at the Indonesian Center of Forecasting Plant Pest Organisms (BBPOPT) and Plant Pest Laboratory, Faculty of Agriculture, Universitas Padjadjaran, Indonesia. The method is an experimental method with a randomized block design that involves parental fecundity and survival test (four treatments and six replications) and fecundity and fertility tests (eight treatments and four replications). <b>Results:</b> The results showed a bigger reduction in the fecundity of hybrid parents of <i>B. carambolae</i> and <i>B. dorsalis</i> on interspecific rather than an intraspecific hybrid. The longevity of survival and development of eggs and larvae stages hybrid <i>B. carambolae</i> (♂). Moreover, the fecundity of F1 hybrids was increased compared to the hybrid parents and the fertility was in the range of 79.00-96.75%. <b>Conclusion:</b> Interspecific mating of <i>B. carambolae</i> and <i>B. dorsalis</i> have the potential to survive in nature.