Dantje Tarore, Jusuf Manueke, Vivi Bernadet Montong, Mokosuli Yermia Semuel
Background and Objective: Rice is one of the most important staple foods in the world, especially on the Asian Continent. Postharvest pests can reduce the quality and quantity of rice by up to 25%. Control using pathogenic microbes is the best choice in controlling postharvest pests in general and Sitophilus oryzae rice powder pests in particular. Research has been carried out to know the effect of dosage concentrations of pathogenic cultures and LC50 values of pathogenic Metarhizium anisopliae cultures on the control of S. oryzae rice powder pest. Materials and Methods: The concentration dose of the pathogenic culture of M. anisopliae acted as a treatment. The test insect population for each treatment was 25 imagos. The study of the effect of dose concentration of M. anisopliae culture on the mortality of S. oryzae imago used analysis of variance. Determination of the effective concentration of LC50 using probit analysis. Results: The higher the concentration of the pathogenic culture of M. anisopliae, the higher the mortality of the adult rice powder pest S. oryzae. The highest mortality of rice powder pest S. oryzae occurred at a dose of 50% concentration of the pathogen M. anisopliae culture, namely 89.33%, followed by a concentration of 40% with a mortality of 72.0%, a concentration of 30% with a mortality of 57.33%, a concentration of 20% with a mortality of 13.33% and the lowest dose concentration of 10% with a mortality of 1.33%. Conclusion: The effective concentration dose (LC50) of the pathogenic culture of M. anisopliae in controlling the rice powder pest S. oryzae was 31.88%. © 2023 Dantje Tarore et al.
Department of Pests and Plant Diseases, Faculty of Agriculture, University of Sam Ratulangi, North Sulawesi, Manado, Indonesia; Plant Pests and Diseases Laboratory, Faculty of Agriculture, University of Sam Ratulangi, North Sulawesi, Manado, Indonesia; Departement of Biology, Faculty of Natural and Earth Sciences, Manado State University, Sulawesi Utara, Kabupaten Minahasa, 95618, Indonesia