茭白胡麻叶斑病的发生与防治

• 作 者: 李翠英
• 机 构: 湖南省沅江市农业局,
• 出 处: 农药市场信息
• 发表日期: 2016年17期
• 关键词: 茭白 胡麻 叶斑病 蔬菜作物 低洼田 发生范围 生长期 产业结构调整 病害 叶片

近年来,在产业结构调整中一些低洼稻田已改种蔬菜作物茭白,取得了较好的经济效益,并有逐年扩大之势。但据调查,影响低洼田种植茭白效益的病害较多,其中值得高度注意的是胡麻叶斑病,特别是在高温高湿条件下,该病的发生范围逐步扩大,病情也就日益严重,病株率一般都在20%以上,对获取茭白高产不利。发病症状。茭白胡麻叶斑病在整个生长期均可发生,主要危害叶片,初期叶片上出现黄褐色小点,后扩大为小的褐

In recent years, a number of low-lying paddy fields have been re-planted with vegetable crops in industrial restructuring. They have achieved good economic returns and have been expanding year by year. However, according to the survey, there are many diseases that affect the effectiveness of planting white rice in low-lying fields. Among them, it is highly deserved to pay attention to flax leaf spot, especially in the conditions of high temperature and high humidity. The incidence of this disease is gradually expanding and the disease is getting worse. Plant strains are generally more than 20%, adverse effects on access to high yield. Symptoms.茭 White flax leaf spot can occur throughout the growing season, the main hazard leaves, yellow leaves appear on the initial spot, then expanded to small brown