水稻潜叶蝇是水稻幼苗期常发生的一种危险性虫害,以幼虫潜伏于稻苗叶片中危害,使幼苗枯死腐烂,造成缺苗断行,降低保苗株数,从而影响水稻产量,严重时可使水稻产量大幅度下降,甚至绝产。从1987年开始连续三年,我们进行了大田间试验和调查,以探讨水稻潜叶蝇对水稻产量的影响。结果表明,水稻潜叶蝇幼虫数与水稻产量损失量的关系呈极显著的相关(r=0.9931),其回归关系式为:y=39.79+0.723x±8.156利用上式可预测潜叶蝇的为害程度。例如,当潜叶蝇幼虫密度每平方米50头和100头时代 Rice leaf miner is a kind of dangerous insect pest that often occurs in the rice seedling stage. The larvae lurk in the leaves of rice seedlings to make the seedlings wither and die, resulting in the seedling breaking and breaking, reducing the seedling number and thus affecting the rice yield. In severe cases, Rice production dropped significantly, or even absolutely. For three consecutive years since 1987, we conducted field trials and surveys to investigate the impact of rice leaf miner on rice yield. The results showed that there was a significant correlation between rice leaf miner larvae number and rice yield loss (r = 0.9931), and the regression equation was y = 39.79 + 0.723x ± 8.156. Degree of harm. For example, when leaf miner larvae density is 50 and 100 heads per square meter