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研究结果表明,中华稻蝗若虫有6个龄期,各龄平均食量分别为1.71、4.38、8.43、15.97、24.12和41.66cm~2;成虫平均食量为130.36cm~2。稻蝗的取食量及危害损失率均与虫口密度呈正相关。苗期y=-0.08328+0.5416×(r=0.9963);分蘖期y=0.06465+0.6891x(r=0.9982);孕穗期y=0.07999+1.108x(r=0.9966)。水稻不同生育期受稻蝗危害的损失,与危害期距(D)有关,关系式为,y=(0.6891+KD)x-0.06465,经分析,亩产500kg生产水平的稻田,若虫危害期距为6—16天时,防治指标为62.97—51.66头/百丛。
The results showed that there were 6 age stages of O. japonicus, the average appetite of each age was 1.71, 4.38, 8.43, 15.97, 24.12 and 41.66 cm ~ 2 respectively. The average food intake of adults was 130.36 cm ~ 2. Rice Locust feeding and the damage rate of loss were positively correlated with the population density. Seedling y = -0.08328 + 0.5416 × (r = 0.9963); tillering stage y = 0.06465 + 0.6891x (r = 0.9982); booting stage y = 0.07999 + 1.108x (r = 0.9966). The loss of rice at different growth stages affected by O. chinensis is related to the hazard interval (D), and the relation is y = (0.6891 + KD) x-0.06465. After analysis, the yield of 500kg per mu For 6-16 days, the control index of 62.97-51.66 head / hundred plexus.