汉中市元胡霜霉病分布及发生规律研究

汉中市元胡主要分布在平川沿江地区。城固县元胡霜霉病的发生相对要轻。蔬菜种植区、旱连作区元胡霜霉病发生较重。重茬会加重霜霉病的发生。高海拔地区较低海拔地区发病要轻。水旱轮作的种植模式能有效的降低霜霉病的发生。提高种植技术加强病害防控能有效的降低霜霉病的发生程度。

Study on Distribution and Occurrence Regularity of PestoniaSolanacearum in Hanzhong

Hanzhong Rhizoma corydalis is mainly distributed along the Yangtze River in Pingchuan District of Hanzhong. The occurrence of downy mildew was relatively light in Chenggu county. The occurrence of downy mildew was more serious in vegetable planting area and dry continuous cropping area. Continuous cropping will aggravate the occurrence of downy mildew. The incidence of the disease is less in the lower altitude area than in the high altitude area. The planting pattern of paddy-upland rotation can effectively reduce the occurrence of downy mildew. The occurrence of downy mildew can be effectively reduced by improving planting technology and strengthening disease control.