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试验证明,从陇南洛夫林10小麦上所采集的条锈菌标样中所筛选出的4个洛夫林10常温致病菌系,均属同一致病类型,统称为洛10常温致病菌系。洛夫林10常温致病菌系能正常侵染洛夫林10的幼苗和成株,且其致病的适温范围较广(12～20℃),致病最适温度偏高(16～20℃);该菌系在鉴别寄主上的反应与条中25号小种相似,但其致病范围较25号小种为广,对供试的83.3%的洛夫林10后代品种具致病性,并且可正常感染高加索,阿夫乐尔、柯斯等抗源材料。到目前为止,洛夫林10常温致病菌系主要集中分布于洛天林10品种上,川道麦区的比例较山区麦高。随着洛夫林10常温致病菌系数量的增长不仅会使陇南洛夫林10的病情进一步加重,而且会直接影响北方麦区洛夫林10后代品种的利用。因此,抓住当前时机,及时防止洛夫林10常温致病菌系的蔓延扩散,是十分迫切而重要的任务。为此,建议在陇南采取以下措施(1)尽快地大力压缩洛夫林10品种的种植面积,特别是川道;(2)对继续种植洛夫林10品种的地区和田块,应实行粉锈宁拌种或进行早春喷药防治。
Experiments show that from the Longnan Lovrin 10 wheat stripe rust samples collected from the four strains of Lovrin 10 at room temperature pathogenic strains belong to the same type of disease, collectively referred to as Luo 10 room temperature pathogenic Department of bacteria. Lovrin 10 strains of normal temperature can infect normal Lovrin 10 seedlings and adult plants, and its pathogenic temperature range is wider (12 ~ 20 ° C), the optimal pathogenic temperature is high (16 ~ 20 ℃). The strain on the identification host was similar to the race 25, but its pathogenicity was wider than that on the 25th race. The results showed that 83.3% of the Lovrin 10 progenies The disease, and can be normal infection Caucasus, Afrodite, Coarse and other source materials. So far, 10 strains of Lovrin strain at room temperature are mainly distributed in 10 varieties of Luo Tianlin, and the proportion of Chuandao rye region is higher than that of mountainous region. With the increase of Lovrin number, the increase of the number of pathogenic bacteria at room temperature will not only aggravate the condition of Lovrin 10 in Longnan, but also directly affect the utilization of Lovrin 10 progeny in the northern wheat field. Therefore, it is an urgent and important task to seize the current opportunity and prevent the spread and proliferation of Lovrin 10 at room temperature. Therefore, it is suggested that the following measures should be taken in Longnan: (1) As soon as possible, the planting area of Lovrin 10 should be greatly reduced, especially for Chuandao; (2) For areas and plots that continue to grow Lovrin 10, Or spraying early spring prevention and treatment.