中国蔬菜Issue(6)：28-34,7.
设施蔬菜苗期病害病原鉴定及化学药剂筛选
Identification of Seedling Disease Pathogens in Greenhouse Vegetable and Screen of Fungicides
摘要
Abstract
Major seedling diseases of 10 vegetable species in greenhouse,including Cruciferae (Chinese cabbage,broccoli,cabbage,radish),Solanaceae(tomato,pepper,eggplant)and Cucurbitaceae(cucumber, wax gourd,pumpkin)were investigated and their pathogens were identified according to their morphological characteristics and molecular biology.The control effect of fungicides collected from different sources and against 4 main seedling diseases including damping-off,rhizoctonia disease,Fusarium wilt disease and Phytophthora blight were screened.The results showed that 736 bacteria strains were isolated from 864 seedling disease samples of 10 vegetable species.And 16 isolates were identified,among them 13 infective pathogens could generate 8-9 types of seedling diseases in various vegetable species.The most prevalent seedling diseases were traditional damping-off and rhizoctonia diseases,followed by root rot,Phytophthora blight and gray mold.The effective fungicides were screened out.32.5% Difenoconazole·azoxystrobin suspension concentrate(SC)and 2.5% fludioxonil SC had remarkable effect in controlling rhizoctonia disease.70% thiophanate methyl wettable powder(WP),36% Thiophanate-Methyl SC and 3% metalaxyl·hymexazol aqueous solutions(AS) were effective for controlling Fusarium wilt. 68% metalaxyl-M mancozeb water dispersible granule(WG),25% metalaxyl-propamocarb WP,72% cymoxanil·mancozeb WP,50% dimethomorph WG,50%Fluazinam SC,64% oxadixyl·mancozeb WP and 10% cyazofamid SC had outstanding effect in controlling Phytophthora blight,50% Fluazinam SC and 64% oxadixyl·mancozeb WP,10% cyazofamid SC,72% cymoxanil·mancozeb,propamocarb hydrochloride WP,72.2% Propamocarb hydrochloride AS,50% dimethomorph WG,68% Metalaxyl-M mancozeb WG and 60% pyraclostrobin+metiram WG etc.were effective for controlling damping-off.关键词
设施蔬菜/苗期病害/病原鉴定/药剂筛选Key words
Greenhouse vegetable/Seedling disease/Pathogen identification/Fungicide screening引用本文复制引用
杨宇红,杨翠荣,凌键,茆振川,陈国华,谢丙炎..设施蔬菜苗期病害病原鉴定及化学药剂筛选[J].中国蔬菜,2015,(6):28-34,7.基金项目
国家公益性行业（农业）科研专项（201303014），现代农业产业技术体系建设专项（CARS-25-B-01），农业部园艺作物生物学与种质创制重点实验室项目，中国农业科学院创新工程 （）
