摘要
水稻秆腐菌核病的发生程度与温湿度有关 ,在 15℃～ 30℃范围内温度越高 ,越有利于病菌的侵入 ,潜育期也越短。在 2 5℃条件下 ,保湿 2 4h病菌就能完成侵入 ,保湿时间越长 ,侵染率越高 ,发病程度越重。在黑龙江省密山地区于 7月 2 0日前后开始发病 ,随时间推移 ,病穴率、病株率和病情指数均呈对数曲线形式增长。 7月下旬至 8月中旬病害主要是水平方向扩展 ,8月中、下旬病害主要是垂直方向扩展。
The development of sclerotiniose blight of rice stem rot relates to temperature and moisture. The higher the is temperature (at the range of 15℃～30℃),the more advantageous is the infection of disease germ and the shorter is the latent period At 25℃, disease germ can finish infection if it is moistened 24 hours. The longer is the moist time, the higher is the infection efficiency and the heavier is the development of outbreak. It begins to break out on July 20 or so at Mishan city Heilongjiang province. With the time going on, disease hole, diseased plant and disease index increase in the form of logarithmic curve. Disease is mainly horizontally spread at last ten days of July to the middle ten days of August. At August 11 to 31, disease is mainly vertically spread. The effective control method is eradication, reaping at the level of mud or single irrigation single drain.
出处
《黑龙江农业科学》
2002年第2期8-10,共3页
Heilongjiang Agricultural Sciences
基金
省科技厅项目
关键词
寒地
水稻
秆腐菌核病
发生规律
小球菌核病
rice
sclerotiniose blight of rice stem rot
nalataea sigmoideam(cav.)
occurrence rule
