四川小麦条锈病发生及防治研究

影响小麦条锈病流行的气象因子依次为雨量，日照时数，温度。特别是３月中，下旬到４月上旬的降雨量对条锈病的发生流行至关重要据此建立了中长期预测预报模式。小麦锈病的发生期大多在１－２个月，最早的在１２月中，下旬。２－３月份为病害高峰期，４月份为严重危害期，播种期越早发病也越早。病害流行扩展快。目前我省条锈病菌的优势小种为条为３０，３１号，新小种水源类型正在迅速上升，已达２０％。

STUDIES ON DYNAMICS AND CONTROLLING TECHNIQUES OF WHEAT STRIPE RUST IN SICHUAN

This article reported the dynamics and controlling techniques of wheat stripe rustin recent years in Sichuan. The results showed that: (1) The most important climate factor affectinn the severity of wheat stripe rust was the precipitation in the middle and late of March and the early of April; and the other factor was the sunshine time and temperature. This article, therefore, supplied a mathematical model for middle and long term forecasting of disease epidemic. (2) For the composition of races of wheat stripe rust in Sichuan from 1987, CYR 30 and CYR 31 were dominant with a new race SY which has increased to 20%. (3) The key measures for the control of the disease consist of extension of new resistant varities, strengthening of monitoring work, scientific application of new pesticides such as DLT, and the best contrdling time as the early ear stage.