摘要
为明确挥发性化合物反式-2-己烯醛、香茅醛、1-辛烯-3-醇、芳樟醇、1-戊烯-3-醇对土传病害及线虫病的防治潜力,采用密封盘菌丝生长速率法比较了挥发性化合物对辣椒疫霉等7种植物土传病原真菌、南方根结线虫和禾谷孢囊线虫的生物活性。反式-2-己烯醛和香茅醛的生物活性高于1-辛烯-3-醇、芳樟醇及1-戊烯-3-醇,21.0μL/L反式-2-己烯醛处理能够完全抑制供试病原真菌菌丝的生长。10.5μL/L反式-2-己烯醛或香茅醛处理对花生冠腐病菌孢子及棉花黄萎病菌色素的产生均有较强的抑制作用,且42.0μL/L处理能够完全抑制黄瓜菌核病菌菌核的萌发。2.62μL/L反式-2-己烯醛处理南方根结线虫和禾谷孢囊线虫的2龄幼虫,24h的死亡率均为100%;2.62μL/L香茅醛处理24 h的死亡率分别为95.4%和89.5%,而对照处理的死亡率分别为2.5%和3.0%。研究表明反式-2-己烯醛及香茅醛具有较好的熏蒸抑菌及杀线虫活性。
In order to understand the antifungal and nematicidal activities of five volatile compounds as soil fumigants, trans-2-hexen-l-al, citronellal, linalool, 1-octen-3-ol, and 1-penten-3-ol, were tested for their activities against seven soil-borne pathogenic fungi and two nematodes, Meloidogyne incognita and Heterodera avenae in sealed dishes. Trans-2-hexen-l-al and citronellal showed relatively higher biological activities than linalool, 1-octen-3-ol, and 1-penten-3-ol. Trans-2-hexen-l-al could completely inhibit my- celium growth of pathogens at the concentration of 21.0 μL/L. Both of trans-2-hexen-l-al and eitronellal with 10.5 μL/L could significantly inhibit the spores formation of Aspergillus niger and the pigment forma- tion of Verticillium dahlliae, and at 42.0 μL/L they could completely inhibit the sclerotium germination of Sclerotina sclerotiorum. Trans-2-hexen-l-al （2.62 μL/L） induced a mortality of 100% to the 2nd instar larvae of both M. incognita and H. avenae when applied over 24 h, while citronellal （2.62 μL/L） induced a mortality of 95.4% and 89.5%, in contrast to the 2.5% and 3.0% trol. The results showed that both of trans-2-hexen-l-al and eitronellal mortality respectively in the con- possess strong fumigant antifungaland nematocide activities.
出处
《植物保护学报》
CAS
CSCD
北大核心
2012年第6期561-566,共6页
Journal of Plant Protection
基金
山东省优秀中青年科学家科研奖励基金(BS2011NY012)
关键词
挥发性化合物
土传病原菌
线虫
生物活性
volatile compounds
soil-borne pathogens
nematode
bioactivity
