IMPACT OF ECOLOGICAL ENGINEERING ON THE TYPE AND POPULATION OF PESTS, NATURAL ENEMIES, AND YIELDS OF THE RICE

Abstract

Impact of ecological engineering on the type and population of pests, natural enemies, and yields of the rice. This study was performed to investigate the impact of the ecological engineering in the rice field on the crop damage caused by yellow stem borer, including it’s type and population as well as its natural enemies and the yields of the rice. The study was conducted in farmer’s fields in Subang District in the dry and the wet seasons. The research was arranged using Randomized Complete Block Design (RCBD) with 9 treatments and 3 replications. The observation was conducted on the crop damage caused by yellow stem borer, the type and the population of pests insect, its predator, and parasitoid as well as yields of the rice. The planting of flowering plants and crops showed inconsistent effect on the population of brown planthoppers, whitebacked planthoppers, and rice black bug. Moreover, it also not significantly impact the yellow stem borer. The planting of flowering plants and crops did not affect the rice yields. The parasitization level of the parasitoid was in ranged of 47.32– 50.47% (dry season) and 36.37–53.92% (wet season). The neutral insect population was dominant at the beginning of planting (11–1743), meanwhile at the maximum tillering until the harvest was dominated by predators (9.33–131.33). The parasitoids were relatively contrasted on each stage of the rice plant.

Keywords

• ecological engineering
• natural enemies
• pests
• rice yield