Conserve beneficial organisms. There are rich communities of beneficial organisms in the rice ecosystem in the absence of natural-enemy killing pesticides. The indiscriminate use of pesticides reduces biodiversity and disrupts the natural balance of insect pests and beneficial organisms. Conservation of these beneficial organisms is safe, economical, and permanent. For example, long-horned grasshopper feeds on the egg mass of stemborers while spiders feed on the nymphs and adults of leafhoppers and planthoppers..