为明确不同外源化学物质对花生抗褐斑病和网斑病的诱导作用,本文测定了水杨酸、氯化钙和硅酸钠等6种外源化学物质对花生网斑病和褐斑病的田间抗性诱导效果,以及对植株主要农艺性状和产量的影响.结果表明,供试6种外源化学物质对花生褐斑病和网斑病均有一定的诱抗效果,其中氯化钙对花生网斑病的诱抗效果最好(53.01%),硅酸钠对花生褐斑病的诱抗效果最好(42.28%);两者均能延缓花生叶斑病的发生,病程进展曲线下面积(AUDPC)显著低于其他处理,氯化钙处理较对照处理网斑病的AUDPC值低28.87%,硅酸钠处理褐斑病的AUDPC值较对照低31.77%.此外,氯化钙处理能显著提高花生荚果产量,较对照增产17.81%.%The objective of this study is to understand the resistance induced by exogenous chemicals to peanut early leaf spot disease and web blotch disease. The induced resistance efficacy,agronomic traits and pod yield of six exogenous chemicals such as salicylic acid,calcium chloride and sodium silicate to two diseases were tested. The results indicated that all 6 compounds could induce resistance to peanut early leaf spot disease and web blotch disease,when applied to the plants as a spray treatment. Calcium chloride was the most effective in controlling web blotch disease (53. 01%)and sodium silicate was the most effective in controlling early leaf spot disease (42. 28%). The areas under disease progress curve (AUDPC)of calcium chloride and sodium silicate treatments were significantly smaller than that of others,which were 28. 87% (calculated with disease index of web blotch) and 31. 77% (based on disease index of early leaf spot),and smaller than that of control. Furthermore,calcium chloride treatment was the best to improve the pod yield of peanut,with 17. 81% increased compared to water con-trol.
展开▼
