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为明确韭菜和辣椒间作对辣椒疫病的防治效果及其化感机理,比较了韭菜和辣椒不同行比间作对辣椒疫病的防治效果,测定了韭菜茎、叶挥发物与浸提液对辣椒疫霉菌的抑制作用,并分析了韭菜根系对辣椒疫霉菌游动孢子侵染和传播行为的影响。结果表明,韭菜与辣椒行比为3∶1间作能显著控制辣椒疫病的扩展与传播;2.0 g/皿韭菜茎挥发物及0.15 m L/m L茎浸提液对辣椒疫霉菌菌丝生长的抑制活性可达33.33%和88.75%;辣椒疫霉菌游动孢子对韭菜根系具有明显的趋化活性,且于根围迅速休止并萌发,丧失在土壤中继续寻找寄主的能力,其传播侵染行为受到干扰。研究表明,韭菜和辣椒间作可以有效控制辣椒疫病的扩展蔓延,实现对辣椒疫病的生态防控。
In order to clarify the control effect and allelopathy mechanism of chive and pepper intercropping on pepper blight, we compared the control effects of different ratios of chives and chili to pepper blight. The effects of stem and leaf volatiles of Leek and pepper on Phytophthora capsici The effects of root system of leek on infection and transmission of zoospore in Phytophthora capsici were analyzed. The results showed that the 3: 1 intercropping of chives and pepper could significantly control the spread and propagation of pepper blight. The effects of 2.0 g / dish leek volatiles and 0.15 m L / The inhibitory activity was up to 33.33% and 88.75%, respectively. Zoospores of Phytophthora capsici had obvious chemotactic activity on roots of Chinese chives, and rapidly stopped and germinated in the rhizosphere, losing the ability to continue looking for hosts in the soil. Disturbed. Studies have shown that chives and pepper intercropping can effectively control the spread of pepper epidemic spread, to achieve ecological control of pepper blight.