Virulence of Beauveria bassiana from Different Carbohydrate Sources Against Riptortuslinearis L. (Hemiptera: Alydidae)

Abstract

Abstract Riptortuslinearis is a cosmopolitan pest that is widespread throughout the world. These pests are also polyphagous which meansthis pest has many hosts. The potential of R. linearis as a pest needs to be monitored because it is an important pod sucking pest. The entomopathogenic fungi are one of the biological control agents that are often used to control plant pests. One of the entomopathogenic fungi that are often used to control insect pests is Beauveria bassiana. Media that contains all the essential nutrients needed fungi for fungal culture in the laboratory. The source of nutrition is a determining factor for the growth and virulence of entomopathogenic fungi because the rate of germination, growth, and sporulation arean indicator of the level of virulence. The research was conducted at the Laboratory of Agrotechnology, UniversitasMuhammadiyah Tapanuli Selatan. This research used a Completely Randomized Design, 5 treatments (5 growth media for B. bassiana). The results showed that B. bassiana grown in the various media had no significant effect on the mortality of R. linearis imago. The lowest LT50 R. linearis was caused by B. bassiana infection grown on rice media.