An insect that sucks the sap of the developing grains, causing serious rice crop losses. The species of rice bugs of major economic significance are Leptocorisa acuta, L. oratorius, and L. chinensis. The nymphs and adults are difficult to recognize in the rice field because of their color. The freshly hatched nymphs are tiny and green but become brownish as they grow. Both nymphs and adults feed on rice plants.