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在1973～1979年间,以六合县农科所为基点,研究了测定田水中噬菌体数量的消长来预报水稻白叶枯病。病田噬菌体数量变化的趋势是:早期的田水中很少测得噬菌体,到分蘖末期其数量急剧增加(急增期),以后随病害的发展而增加,到生育末期又逐渐下降。田水中噬菌体的数量达到每毫升500个时作为“急增期”的指标,这时距田间病害的始发期有10天左右,根据噬菌体急增期可以预报病害的始发期。同时,发病田块的噬菌体在急增期的数量一般都达到或超过每毫升1000个,低于这个量的田块一般不发病。根据田水中噬菌体的数量消长,可以预测特定田块在将来是否发病。
From 1973 to 1979, taking the Luoye Agricultural Science Institute as a starting point, the decline of the phage in field water was studied to forecast the bacterial leaf blight. Phage number changes in the trend of the disease is: the early field of water rarely measured phage, to the end of the tillering the sharp increase in its number (rapid increase), with the development of disease increased and gradually decreased to the late growth stage. The number of phage in field water reached 500 per milliliter as an indicator of “rapid increase”, when the onset of disease from the field was about 10 days. According to the rapid increase of phage, the onset of disease could be predicted. At the same time, the number of bacteriophages in the field of sudden increase in the number of generally reached or exceeded 1000 per milliliter, below this amount of plots are generally not disease. According to the field of phage in the number of growth and decline, can predict the specific field in the future whether the disease.