叶面喷施四种诱导剂预防西葫芦白粉病效果  

Inhibition Effect of Powdery Mildew Development by Foliar Spray Four Inducers to Summer Squash(Cucurbita pepo L.)

作　　者：朱焕焕 靳颖玲 程永安[1] 张明科[1] 

机构地区：[1]旱区作物逆境生物学国家重点实验室西北农林科技大学园艺学院,陕西杨凌712100

出　　处：《北方园艺》2017年第1期118-125,共8页Northern Horticulture

基　　金：公益性行业(农业)科研专项资助项目(201303112);国家大宗蔬菜产业技术体系建设资助项目(CARS-25)

摘　　要：以3个西葫芦品种和6份西葫芦种质为试材,通过叶面喷施5g·L^(-1) NaHCO_3、5.706g·L^(-1)K_2HPO_4、2.62g·L^(-1)K_2SiO_3和RM(0.188g·L^(-1)核黄素+0.746g·L^(-1)蛋氨酸),研究了4种药剂对西葫芦白粉病的预防效果及对单株产量和叶片中可溶性糖及可溶性蛋白质含量的影响,以期探寻预防西葫芦白粉病的化学农药替代技术。结果表明:对西葫芦白粉病的预防效果表现为5.706g·L^(-1) K_2HPO_4>5g·L^(-1) NaHCO_3>2.62g·L^(-1) K_2SiO_3>RM;4种诱导剂处理均能在一定程度上有效延缓西葫芦白粉病的发展进程,且有促进植株生长的作用;各处理对西葫芦单株产量的影响没有明显的规律,但产量均较对照有所提高,以5.706g·L^(-1) K_2HPO_4和RM处理的增产效果较好。植株诱导抗性增强与产量增加呈正相关,相关系数为0.693;各处理均提高了西葫芦植株叶片中的可溶性糖和可溶性蛋白质含量,植株诱导抗性增强与可溶性糖含量增加呈正相关,相关系数为0.754。表明西葫芦可能通过调节植株内源营养物质的种类及含量来调节自身应激反应,诱导形成对白粉病的抗病机制。Three varieties of summer squash and six pieces of germplasm were used as test materials.The inhibition effects of four inducers（5g·L-1 NaHCO3,5.706g·L-1 K2HPO4,2.62g·L-1 K2SiO3 and RM（0.188g·L-1 riboflavin＋0.746g·L-1 methionine）on powdery mildew,yield,soluble sugar content and soluble protein content were studied to search alternative technologies of chemical pesticide to prevent squash powdery mildew.The results showed that the inhibition effect on powdery mildew of summer squash was5.706g·L-1K2HPO4〉5g·L-1 NaHCO3〉2.62g·L-1K2SiO3〉RM.To a certain degree,the four kinds of inducer treatments could postpone effectively powdery mildew occurrence and promote plant growth.The effect on individual plant yield of summer squash had no obvious regularity,but all were higher than control.The effect of 5.706g·L-1K2HPO4 and RM treatment were better.Plant added yield was positively correlated to increase resistance,the correlation coefficient was 0.693.The soluble protein content and soluble sugar content of summer squash leaf increased after treatments.Soluble sugar content increase was positively correlated to increasing resistance,the correlation coefficient was 0.754.The measures induced the summer squash own stress reaction and formation of powdery mildew resistant mechanism by adjusting the endogenous type and content of nutrients.

关 键 词：西葫芦 白粉病 磷酸氢二钾 预防效果 

分 类 号：S436.429[农业科学—农业昆虫与害虫防治]