Application of biopesticides to Nilaparvata lugens Stal. and Triporyza incertulas L. in Jember, East Java, Indonesia

Abstract

This study aims to determine the potential of Biological Control Agents (BCA) and botanical pesticides against important pests of rice. The study was designed with a completely randomized design (CRD) consisting of the application of: Beauveria bassiana at a dose of 1012 spores ha−1,Vertilicium lecanii at a dose of 106 spores ha−1, red bacteria (Serratia marcescens) at a dose of 2.107 CFU ha−1, botanical pesticides with a dose of 20 Kg ha−1, and Buprofezin at a dose of 1 Kg ha−1 as a control treatment. Parameters observed included: population of important pests, attack intensity, population of natural enemies, and population of potential pests. The results showed mass production of BCA V. leccanii, B. bassiana, and S. marcescens can be carried out in the Biocontrol Laboratory. Application of BCA in the field showed that the important pests that emerged from the beginning of the observation were: the brown leafhopper, Nilaparvata lugens, and the yellow rice stem borer (Triporyza incertulas), and the golden snail (Portula canaliculata). The population of the two types of pests reached 0.0 – 1.5 per clump and under 1 species per clump. The species of natural enemies found were dominated by Arachnida spiders, Tomcat (Phaederus fuscipes), and Coccinelid beetles as predators of brown planthopper pests. The population reached spiders (2 – 10 species per plot), Tomcat Phaederus fuscipes (24 – 34 species per plot), and Coccinelid beetles (1-6 specie per plot). The results of rice crop of application BCA reached 4.82 Kg ha−1. Meanwhile, botanical pesticides reached 4.72 Kg ha−1 and chemical insecticide treatments reached 6.11 Kg ha−1.