氯钾离子共体诱导黄瓜抗霜霉病方法的研究

黄瓜经氯钾离子共体诱导后，霜霉病的发病程度显著降低，不同的诱导方法产生不同的诱导效果，同种方法下不同的处理浓度所产生的诱导效果也不同。本试验采用灌根、叶面喷施、茎部注射、种子浸泡4种诱导方法，每种诱导方法下又分5个不同的处理浓度。试验结果表明灌根诱导效果最好，叶面喷施诱导效果较好，其次为茎部注射、种子处理，它们的平均相对免疫效果分别达到47．63％、28．9z％、16．95％、14．32％，在每种诱导方法下诱导抗性最佳的处理浓度叶面喷施为1％和1．5％；灌根诱导为1％；茎部注射为2％；种子浸泡为8％。

RESEARCH OF METHODS ON RESISTANCE TO DOWNY MILDEW INDUCED WITH COPOLYMER OF CHLORINE AND POTASSIUM IONS IN CUCUMBER

The disease severity of Pseudoperonospora cubensis(Berk.et Curt.) Rostov decreased obviously when the cucumber seedlings were induced by copolymer of chlorine and potassium ions.The effects were influenced by different inducing methods. Four induced methods including root-drench,leave-spray,stem-injection and seed-soaking were used in this experiment. For the same method if the treat concentrations were different,the effects of immunity were different.In every method there were five different treat concentrations.The results showed:the effect of root-drench was the best, leave-spray was in the next place, stem-injection and seed-soaking were thirdly.Their mean relative immunization efficiency were 47.63%,28.92%,16.95% and 14.32% respectively. In the four method of root-drench leave-spray,stem-injection and seed-soaking the optimum inducing concentration were 1%,1% and 1.5%,2% and 8% respectively after the treatment of copolymer of chlorine and potassium ions.