论文部分内容阅读
１９９６年陇南地区小麦条锈病局部发生严重，整个麦区呈区域性流行，病害发生程度属中度偏重发生年，发病面积１６．７ｈｍ２以上。发生特点是突发性流行，流行期偏迟，４月上、中旬仅个别地块发病，６月上旬后，该地小麦条锈病普遍发生，部分重病田普遍率和严重度达到“双百”。病害流行的主要原因是，新的毒性小种上升，导致生产品种抗性丧失；气候条件有利于条锈病发生；１９９６年四川省小麦条锈病发生严重且早于陇南，为陇南麦区提供了大量菌源。
Longitudinal wheat stripe rust occurred in Longnan area in 1996, and the entire wheat area was endemic. The incidence of the disease was moderately severe, with a disease area of 16.7hm2 or more. Occurred characteristics of a sudden epidemic, the prevalence of late, in April, only a few individual plots in mid-June, early in the month of wheat stripe rust in the area generally occur, the prevalence and severity of some serious disease reached “double hundred” . The main reason for the epidemic is that the rise of new toxic races led to the loss of resistance of the cultivars. The climatic conditions were favorable for the occurrence of stripe rust. In 1996, the stripe rust of wheat in Sichuan Province was severe and earlier than that of Longnan, providing a large quantity of wheat in Longnan Bacteria source.