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了解白粉病在小麦顶三叶上(从旗叶起,旗叶为倒一叶,其下位叶为倒二叶,倒二叶下位叶为倒三叶,下同)的发生规律,对于及时展开小麦白粉病的防治,保护顶三叶功能有重要意义。我们根据田间系统调查资料,作如下分析。 一、顶三叶间发病的相关回归关系 1.倒二叶与倒三叶发病具有同步性 从图一可见,小麦顶三叶发生白粉病趋势基本一致,从零星发病开始,病叶率逐渐
Understand the occurrence of powdery mildew on the top trefoil of wheat (from the flag leaf, the flag leaf is down a leaf, the next bit of leaves for the next two leaves, the next two leaves of the lower leaves for the inverted clover, the same below) the occurrence of timely development Prevention and control of wheat powdery mildew, the protection of top clover function is of great significance. Based on the field system survey data, we make the following analysis. First, the correlation between the incidence of top trilobal relationship 1. Inverted two and three trichosanthes synchronous onset As can be seen from Figure 1, the occurrence of top powdery mildew in wheat top three trends are basically the same, from the sporadic incidence of sick leaves gradually