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韭菜和辣椒间作对辣椒疫病的防治效果及其化感机理

引用本文：江冰冰,张彧,郭存武,杨翠枝,朱书生,杨敏.韭菜和辣椒间作对辣椒疫病的防治效果及其化感机理.植物保护学报,2017,44(1):145-151

DOI：10.13802/j.cnki.zwbhxb.2017.2015102

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作者	单位	E-mail
江冰冰	云南农业大学, 农业生物多样性与病虫害控制教育部重点实验室, 云南生物资源保护与利用国家重点实验室, 昆明 650201
张彧	云南农业大学, 农业生物多样性与病虫害控制教育部重点实验室, 云南生物资源保护与利用国家重点实验室, 昆明 650201
郭存武	云南农业大学, 农业生物多样性与病虫害控制教育部重点实验室, 云南生物资源保护与利用国家重点实验室, 昆明 650201
杨翠枝	云南省大理州宾川县植保植检站, 宾川 671600
朱书生	云南农业大学, 农业生物多样性与病虫害控制教育部重点实验室, 云南生物资源保护与利用国家重点实验室, 昆明 650201	shushengzhu79@126.com
杨敏	云南农业大学, 农业生物多样性与病虫害控制教育部重点实验室, 云南生物资源保护与利用国家重点实验室, 昆明 650201	yangminscnc@126.com

中文摘要:为明确韭菜和辣椒间作对辣椒疫病的防治效果及其化感机理，比较了韭菜和辣椒不同行比间作对辣椒疫病的防治效果，测定了韭菜茎、叶挥发物与浸提液对辣椒疫霉菌的抑制作用，并分析了韭菜根系对辣椒疫霉菌游动孢子侵染和传播行为的影响。结果表明，韭菜与辣椒行比为3：1间作能显著控制辣椒疫病的扩展与传播；2.0 g/皿韭菜茎挥发物及0.15 mL/mL茎浸提液对辣椒疫霉菌菌丝生长的抑制活性可达33.33%和88.75%；辣椒疫霉菌游动孢子对韭菜根系具有明显的趋化活性，且于根围迅速休止并萌发，丧失在土壤中继续寻找寄主的能力，其传播侵染行为受到干扰。研究表明，韭菜和辣椒间作可以有效控制辣椒疫病的扩展蔓延，实现对辣椒疫病的生态防控。

中文关键词:韭菜辣椒疫病化感作用挥发物浸提液

Control effects and allelopathic mechanism of pepper and Chinese chives intercropping on pepper Phytophthora blight

Author Name	Affiliation	E-mail
Jiang Bingbing	State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Key Laboratory for Agro-Biodiversity and Pest Control of Ministry of Education, Yunnan Agricultural University, Kunming 650201, Yunnan Province, China
Zhang Yu	State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Key Laboratory for Agro-Biodiversity and Pest Control of Ministry of Education, Yunnan Agricultural University, Kunming 650201, Yunnan Province, China
Guo Cunwu	State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Key Laboratory for Agro-Biodiversity and Pest Control of Ministry of Education, Yunnan Agricultural University, Kunming 650201, Yunnan Province, China
Yang Cuizhi	Binchuan Plant Protection and Quarantine Station, Binchuan 671600, Yunnan Province, China
Zhu Shusheng	State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Key Laboratory for Agro-Biodiversity and Pest Control of Ministry of Education, Yunnan Agricultural University, Kunming 650201, Yunnan Province, China	shushengzhu79@126.com
Yang Min	State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Key Laboratory for Agro-Biodiversity and Pest Control of Ministry of Education, Yunnan Agricultural University, Kunming 650201, Yunnan Province, China	yangminscnc@126.com

Abstract:To study the control effect and allelopathic mechanism of pepper and Chinese chives intercropping on pepper Phytophthora blight, the control effect of intercropping pepper and Chinese chives were determined, the inhibitory activities of Chinese chives stem and leaf volatiles and extracts to Phytophthora capsici were tested, and the effect of Chinese chives root on infection and spread of P. capsici zoospores were analyzed. The results showed that intercropping two or three lines of Chinese chives with one line of pepper could significantly control the spread of pepper Phytophthora blight. When the concentration of Chinese chives stem volatiles was 2.0 g/petri and the stem extracts was 0.15 mL/mL, the inhibition rate of mycelium growth reached 33.33% and 88.75%, respectively. The zoospores of P. capsici showed obviously chemotropic activity to Chinese chives root. After reached rhizosphere, zoospores quickly stopped, and then encysted into cystospores to germinate. Thus, zoospores lost their ability to spread in the soil and infect host. Chinese chives intercropped with pepper could effectively control pepper Phytophthora blight.

keywords:Chinese chives pepper Phytophthora blight allelopathy volatiles extracts

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