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根据在部分稻区设点系统调查当地的农作制和农业技术、水稻生育情况及稻螟发生为害规律和螟害程度的结果,对比分析了不同地区螟害程度差别的原因。初步论证了结合农业技术分阶段连续压低稻螟虫源数量对抑制螟害可以起显著的作用,应尽可能作为稻螟综合防治措施的主要组成部分。通过越冬防治压低稻螟发生基数,不仅可减轻前期的螟害,对压低稻螟后期发生量及为害程度也有一定的效果。在越冬防治的基础上,在抢收早稻抢插晚稻期间结合农业技术进一步压低虫源能更有效地控制螟害。结合农业措施分段连续压低虫源的效果与措施的规模、速度和质量有重要的关系。在一定的条件下,单季稻改种双季稻并非完全有利于三化螟的发展,螟害也不一定加重,相反,可以减轻。
Based on the investigation of the local cropping system, agricultural technology, rice growth and the damage rules of rice stem borers and the degree of stem borers in some rice areas, the reasons for the differences in stem borer damage in different regions were comparatively analyzed. The preliminary demonstration that the continuous reduction of the number of rice stem borer sources in stages in combination with agricultural techniques can play a significant role in the suppression of stem borers and should be used as a major component of the comprehensive control measures for rice stem borer. Through overwintering prevention and control to suppress the occurrence of rice stem borer base, not only can reduce the early stem borer, to suppress the occurrence of late rice borer and the degree of damage also have some effect. On the basis of overwintering prevention and control, it is more effective to control the stem borer more effectively during the rush to sequester the late rice in the late rice intercropping with agricultural technology. The effect of continuously reducing insect sources in combination with agricultural measures has an important relationship with the scale, speed and quality of the measures. Under certain conditions, single cropping rice double cropping rice is not entirely conducive to the development of the rice borer, stem borer does not necessarily increase, on the contrary, can be reduced.