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小麦白粉病是我省沿海地区小麦上的主要病害。感病的小麦减产率一般在5—10%,重者达20%以上。掌握小麦白粉病的发展动态,对于分析其发展过程、及时地进行防治具有重要意义。本文运用田间调查得来的数据,对小麦白粉病的发展动态进行了数学模拟。一、数据的收集本文的数据来自具有水浇条件的丰产麦田。该麦田一直未喷施防治小麦白粉病的药剂,小麦白粉病从侵染小麦到小麦收获是一个完整的发展过程,在小麦白粉病的整个发展过程中,笔者定点地进行了系统的田间调查。每次调查100—250个小麦叶片,并计算病情指数。从发现小麦感病至小麦收获,共进行了6次调查,其调查结果如表1所示。
Wheat powdery mildew is a major disease on wheat in the coastal areas of our province. The yield reduction of susceptible wheat is generally 5-10%, with severe cases reaching over 20%. Grasp the development of wheat powdery mildew, the analysis of its development process, timely prevention and control is of great significance. In this paper, we use the data from field survey to simulate the development of wheat powdery mildew. I. DATA COLLECTION The data in this paper comes from high yield wheat fields with irrigated conditions. The wheat field has never been sprayed with a medicament for preventing and controlling wheat powdery mildew. Wheat powdery mildew is a complete process of development from infested wheat to wheat harvest. During the whole development of wheat powdery mildew, the author systematically conducted field surveys. Each survey 100-250 wheat leaves, and calculate the disease index. From the discovery of wheat disease to wheat harvest, conducted a total of 6 surveys, the survey results shown in Table 1.