Abstract: Rice Plant Hopper is one of the main pests in the rice production in Jiangxi Province and its occurrence is closely correlated to the meteorological conditions.Based on statistical and phenological analysis,it was confirmed that the air temperature at 25～29℃ and relative humidity higher than 75% were the suitable meteorological conditions for the reproduction and outbreak of the rice plant hopper.The index R,defined as the ratio of the air temperature to the relative humidity,was used as the index for monitoring and warning of the meteorological grades for the Rice Plant Hopper.R>6,3

Key words: Rice Plant Hopper, Rice Plant Hopper, Meteorological grade, Monitoring