การจัดการระบบนิเวศน์เพื่อลดการระบาดของแมลงศัตรูข้าว

Abstract

Ecological engineering is a new method for reducing rice insect pests outbreaks by planted a flora crops which have yellow or white flower, high nectar, food source and attract benefit insects into rice field to control rice insect pests. Experimental site was set at Chainat Rice Research Center in 2010 having two treatments: ecological engineering site (E-E, growing flora on the rice bund) versus control site (no flora on the rice bund). In E-E site, four growing flora crops were Tridax procumbens, Wedelia chinensis, Gourd (Luffa spp.) and Pumpkin (Cucurbita spp.). Number of pests and natural enemies were collected and found that E-E site had the number of pests and natural enemies more than control site in all sampling methods. Major pests, predators and parasitoids were Nilaparvata lugens, Cyrtorhinus lividipennis and Anagrus optabilis. Insect pests can move from the rice bund to rice field. Severe outbreak of brown planthopper occurred in both site, thus E-E site can be harvested only about 50% of the total area whereas control plot can’t be harvested. Therefore, E-E method can reduced pests outbreaks.