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在明确了5月中下旬与6月中下旬降雨量对向日葵锈病流行的作用基础之上,进一步研究表明病菌的初始菌量也是影响病害流行程度的一个重要因子。向日葵锈病的年度流行主要由环境因素和越冬后的初始菌量两者共同影响的。初始菌量由上年病害发生程度作出估计。据此可作病害流行程度的中期或长期预报。
Based on the clarification of the role of rainfall in late May and mid-to late June in the sunflower rust epidemic, further studies have shown that the initial bacterial count is also an important factor affecting the prevalence of the disease. The annual prevalence of sunflower rust is mainly influenced by both environmental factors and the initial amount of bacteria after winter. The initial amount of bacteria is estimated based on the degree of disease occurrence in the previous year. Based on this, it can be used as mid-term or long-term forecast of disease prevalence.