INJECTION OF ELECTROLYTICALLY GENERATED CHLORINE INTO CITRUS MICROIRRIGATION SYSTEMS FOR THE CONTROL OF CERTAIN WATERBORNE ROOT PATHOGENS

被引：28

作者：

GRECH, NM ^{[1
]}

RIJKENBERG, FHJ ^{[1
]}

机构：

[1] UNIV NATAL,DEPT MICROBIOL & PLANT PATHOL,PIETERMARITZBURG 3200,SOUTH AFRICA

来源：

PLANT DISEASE | 1992年 / 76卷 / 05期

关键词：

PATHOGEN CONTROL; WATER TREATMENT;

D O I：

10.1094/PD-76-0457

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Electrolytically generated chlorine was injected into citrus microirrigation systems. Propagules of Phytophthora nicotianae var. parasitica, P. citrophthora, Fusarium spp., algae, and slime-forming bacteria were killed. Nematodes were found to resist free-chlorine levels in water of up to 50-mu-g ml-1. Microemitters delivering chlorinated water were less frequently blocked by bacterial and/or bacterial slime than those delivering unchlorinated water. Soil and root populations of Phytophthora and nematodes under citrus trees in the field were unaffected by chlorinated water. No chlorine-induced phytotoxicity was observed on field-grown plants. In glasshouse studies, treatment levels between 200 and 500-mu-g ml-1 significantly reduced propagules of Phytophthora in the soil and, in some cases, eradicated the pathogen.

引用

页码：457 / 461

页数：5