Sakti, Bima (2025) Efikasi Insektisida Bacillus thuringiensis subsp. kurstaki Terhadap Hama Ulat Bagong (Carea angulata) dan Interrelasinya Terhadap Predator Sycanus sp. Masters thesis, Universitas Islam Riau.

Text skripsi_224121002_watermark.pdf - Submitted Version Restricted to Registered users only Download (4MB) | Request a copy

Abstract

This study aims to evaluate the effectiveness of Bacillus thuringiensis on the mortality of helmet caterpillar (Carea angulata) and the interrelationship to predator Sycanus sp. in predation. The study was conducted at the Plant Protection, Research and Development Laboratory of PT. Arara Abadi, Perawang, Riau and at the Integrated Laboratory of Agriculture, UIR, from July 2024 to February 2025. The study was conducted with seven different research activities. The results of the study showed that the interaction of Bacillus thuringiensis treatment with a concentration of 2.25 gr/l and various instars of helmet caterpillar, especially in instars II and III, significantly affected the mortality rate of helmet caterpillar pest. The sub-lethal effect of Bacillus thuringiensis on helmet caterpillar that successfully survived and became adults showed a decrease in the lifespan of female adults, the number of egg-laying periods, the number of eggs, the average number of eggs and the percentage of egg hatching. There was no preference for Sycanus sp. in the choice of predation order for various instars of helmet caterpillar I - V. The level of prey power of male and female Sycanus sp. towards the density of prey for bagong caterpillar instars I and II continued to increase when the prey density was 5, 10 and 15 individuals, but decreased when the prey density was 15 individuals in instars III, IV and V. Sycanus sp. did not show a preference for prey for helmet caterpillar larvae that had been exposed and those that were not exposed to Bacillus thuringiensis.

Actions (login required)

View Item