论文部分内容阅读
以市售各类杀菌剂为供试药剂,以沙棘枝枯病菌和发病严重的沙棘树为作用对象,采用生长速率法和田间喷施法,研究了5种药剂对沙棘枝枯病菌的室内抑菌作用,并将有效药剂进行毒力测定和田间防效试验,以期为沙棘枝枯病的快速防治提供参考依据。结果表明:4种化学农药50%百菌清WP、70%甲基硫菌灵、25%丙环唑乳油、70%百菌清WP和1种微生物农药寡雄腐霉对沙棘枝枯病菌具有明显杀菌作用。25%丙环唑乳油、70%百菌清WP和寡雄腐霉具有良好的抑菌效果,抑菌率在80%以上,药效期也比较长,达7 d以上。其中,25%丙环唑乳油的毒性最好,其次是寡雄腐霉,70%百菌清WP最差。田间防效试验表明,3种农药都可有效控制沙棘枝枯病的发生,施药后的发病率明显低于对照(P<0.05),防治效果达70%以上。因此,这3种药剂可以在生产上推广使用,以快速有效防治沙棘枝枯病。
A series of fungicides were used as test agents in the experiment. The test was made on the effect of five agents on the inhibition of the indoor environment of the blight of Hippophae rhamnoides Bacterial effect, and the effective agent for toxicity determination and field efficacy test, in order to provide a reference for the rapid control of sea buckthorn disease. The results showed that the four chemical pesticides 50% chlorothalonil WP, 70% thiophanate-methyl, 25% propiconazole EC, 70% chlorothalonil WP and one kind of microbial pesticide Pythium oligandrum had the Clear bactericidal effect. 25% propiconazole EC, 70% chlorothalonil WP and Pythium oligophylla had good bacteriostatic effect, the antibacterial rate was above 80% and the expiration date was longer than 7 days. Among them, 25% propiconazole EC had the best toxicity, followed by oligozoan Pythium, and 70% chlorothalonil WP was the worst. The field control experiments showed that the three pesticides could effectively control the occurrence of the bacterial wilt of Hippophae rhamnoides, the incidence of which was obviously lower than that of the control (P <0.05), and the control effect was over 70%. Therefore, these three kinds of agents can be used in the promotion of production, in order to quickly and effectively prevent and control sea buckthorn wilt.