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近年来,水稻干尖线虫病的危害较为严重,成为我省粳、糯稻生产的突出问题。 为了做好防治工作,各地开展了病情调查与产量损失率测定。句容、武进等地的调查结果表明,田间能够查见该病症状的发病田块占调查总数的71％以上,虽然平均病株率只有3.72～14.43％,但其产量损失,一般病田在8％左右,严重病田减产率高达35.4％。为何田间查见的病株率较低而产量损失较大?
In recent years, the harm of rice dry tip nematode disease is more serious, become the province of japonica, glutinous rice production outstanding problems. In order to do a good job in prevention and treatment, carry out the disease investigation and yield loss rate determination around. The results of the investigation in Jurong, Wujin and other places showed that the number of fields in which the symptoms of the disease can be found accounted for more than 71% of the total number of surveys. Although the average rate of diseased plants was only 3.72 to 14.43%, the yield was generally lower 8% or so, severe disease reduction rate as high as 35.4%. Why is the rate of diseased plants seen in the field lower and the yield lost?