摘要
１９９６年至１９９８年作者在厦门曾厝埯研究了水稻潜根线虫（Ｈｉｒｓｃｈｍａｎｎｉｅｌａｓｐｐ．）虫口密度的季节消长规律和在稻根内的垂直分布。双季稻虫口出现两个高峰期，分别在６月初和１０月中旬，每１０ｇ鲜根分别带虫７５６．０条和７２５．３条；单季稻虫口仅在６月下旬至７月上旬出现一个高峰期，此时虫口密度达到每１０ｇ鲜根带虫３４３．２条。无论是单季稻还是双季稻，都是从水稻分蘖期到长穗长粒期这一期间根系虫口密度最高。由此可见，该线虫的活动规律与水稻的一生生长，尤其与其营养生长同步化。
Observation was made on the seasonal variation of
population density of Hirschmanniella spp.(H.oryzae is main species) in Zengcuoan village
situated in Xiamen suburbs from March 1997 to February 1998.The results show that the
highest density occurs from rice tiller stage to heading stage.So there are two peak stages in
doublecrop rice at the first ten days of June and during the second ten days of
October,respectively.The average number of nematodes per 10g roots is 7560 and
7253,respectively.There is only one peak stage in singlecrop rice from the third ten days of
June to the first ten days of July.The average number of nematodes per 10g roots is
3432.Besides,we examined 68 rice roots perpendicularly with three equal length and found that
494% larvae appeared at the tip of roots.The least of them appeared at the base of root.557%
females and 571% males appeared at the middle of root.It follows that the reproductive
proliferation of Hirschmanniella spp. is more or less parallel with the growth of the rice plant,so
the authers suggested that the plan of rotating singlecrop rice and winter vegetable is the way
to control this nematode in Xiamen region according to the abovementioned studies of their
biology.
出处
《寄生虫与医学昆虫学报》
CAS
1999年第2期99-106,共8页
Acta Parasitologica et Medica Entomologica Sinica
关键词
潜根线虫
水稻
季节动态
垂直分布
HirschmanniellaRice seasonal variationVertical distribution
