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大量的田间调查结果表明,直播、人工移栽及机插3种插秧方式对南方水稻黑条矮缩病的发生程度及其传播介体白背飞虱的发生量均有不同程度的影响。机插方式下白背飞虱发生量最低,分蘖期成虫为4头/百丛,若虫为12头/百丛,抽穗期发病轻、病株率最低,轻病株率为3%,重病株率仅1.8%;人工移栽方式次之;直播白背飞虱和南方水稻黑条矮缩病的发生都较前两种方式重。调查结果还表明,分蘖期白背飞虱虫量直接影响抽穗期病株率的高低。
A large number of field survey results showed that the direct planting, artificial transplanting and machine inserted three kinds of transplanting methods on the occurrence of black rice dwarf disease in southern rice and its transmission agent whitebacked planthopper occurrence varying degrees. The number of whitebacked planthopper was the lowest during tillering stage, with 4 heads / 100 clumps at the tillering stage and 12 heads / 100 clumps at the tillering stage. The heading stage was light with the lowest incidence of diseased plants and the rate of mild diseased plants was 3% Rate of only 1.8%; artificial transplanting followed; live Sogatella furcifera and southern rice black-streaked dwarf disease occurred heavier than the previous two ways. The survey also showed that the number of whitebacked planthoppers at the tillering stage had a direct impact on the plant disease rate at heading stage.