垂柳锈病的研究

垂柳锈病近年来在内蒙古地区垂柳（ＳａｌｉｘｂａｂｙｌｏｎｉｃａＬ．）上发生严重。经接种试验结果和形态特征观察，该病是由鞘锈状栅锈菌（ＭｅｌａｍｐｓｏｒａｃｏｌｅｏｓｐｏｒｉｏｉｄｅｓＤｉｅｔ．）为害所致。病原菌的性孢子、锈孢子（０、Ⅰ）阶段发生在紫堇（ＣｏｒｙｄａｌｉｓｂｕｎｇｅａｎａＴｕｒｃｚ．）上，夏孢子、冬孢子（Ⅱ、Ⅲ）阶段发生在垂柳上。首次发现紫堇是垂柳锈病菌的转主寄主。采用２５％粉锈宁８００倍液对垂柳锈病的防治效果较好。用２．４—Ｄ丁酯１０００倍液防治转主寄主紫堇效果较为理想。

A Study on Rust of Weeping Willow

The rust of weeping willow has gradually become serious in recent years in inneer Mongolia. Inculation test and shape observation showed the cause was Melampsora coleosporioides Diet. Its spermagonium and aecial states occur on leaves, stems and fruits of Corydalis bungeana; the uredial and telial states occur on the leaves of weeping willow. Inoculations with basidiospores produced from the teliospores overwintered were made on 8 different plants, noly Corydalis bungeana showed the typical symptom on leaves after the inoculation. The best chemical for controlling the disease were dimefon, triadimefon, 2.4-D.