论文部分内容阅读
通过四年的调查,明确了水稻潜根线虫病在广西普遍分布,揭示了该病在稻田发生的特点和数量消长变化情况。发生数量晚稻高于早稻,均在水稻分蘖盛期至孕穗期出现高峰,而数量变化与种植方式差异不大。水稻根部潜根线虫(Hirshmanniella spp.)可在稻桩未腐烂的根和再生稻的根以及几种田边禾本科杂草的根内越冬,以再生稻根内的越冬线虫密度最大,其次是稻根。越冬雌成虫比例数大于雄成虫与幼虫。
After four years of investigation, it was clarified that rice root-knot nematode disease is widely distributed in Guangxi and reveals the characteristics and quantity fluctuation of the disease occurring in the paddy field. The occurrence amount of late rice was higher than that of early rice, both peaked at tillering stage and booting stage, while the change of quantity and planting method showed little difference. Hirshmanniella spp. Overwintered in the roots of non-decaying roots and ratoon rice and in the roots of several field border grasses. The density of overwintering nematodes in the roots of ratooning rice was the highest, followed by Rice root. The proportion of overwintering female adults is greater than male adults and larvae.