大棚莴苣应重防两种病害的发生

• 作 者: 曹立耘
• 机 构: 湖南省沅江市农业局,
• 出 处: 农药市场信息
• 发表日期: 2017年03期
• 关键词: 保护地栽培 棚室栽培 棚内湿度 阴雨天气 灰霉病菌 菌核净 幼茎 菌核萌发 棚室温度 万霉灵

棚室栽培莴苣最易受到两种病害的危害,那就是灰霉病和菌核病。它们都是莴苣的常见病害,因为保护地栽培时棚内湿度大,易诱发这两种病害发生,露地和保护地栽培都有发生,尤以冬春保护地栽培,因连续阴雨天气病害多发,不及时防治对产量损失更大。灰霉病。该病分布较广,通常在保护地栽培区发病较重,莴苣生长的整个生育期均可发生。发病症状:苗期发病,叶片和幼茎呈水渍状腐烂,在病部产生灰色霉层。定植后发病多始于近地面的叶片和茎

Studio cultivation of lettuce most vulnerable to two kinds of disease hazards, that is, gray mold and sclerotinia. They are common diseases of lettuce, because the shelter during the cultivation of humidity, easy to induce the occurrence of these two diseases, open field and protected cultivation have occurred, especially in winter and spring protective cultivation, due to continuous rainy weather prone to disease, Not timely prevention and control of the yield loss greater. Gray mold. The disease is widely distributed, usually in the protected areas of heavy incidence of cultivation, lettuce growth throughout the growing period can occur. Symptoms: the incidence of seedling, leaves and young stems were water-like rot, gray mold layer in the disease. After colonization onset mostly in the ground near the leaves and stems