A Resistance Bioassay for Rhizoctonia Root and Crown Rot and Damping-off Caused by the Anastomosis Groups AG 2-2111B and AG 4 in Sugar Beet  

作　　者：Carlos Berdugo Christian Hillnhiitter Richard Sikora Erich-Christian Oerke 

机构地区：[1]Department Phytomedicine, Institute of Crop Science and Resource Conservation （INRES）, University of Bonn, Nussallee 9, Bonn53115, Germany

出　　处：《Journal of Agricultural Science and Technology(A)》2012年第3期294-302,共9页农业科学与技术（A）

摘　　要：In order to determine the level of resistance of sugar beet varieties against Rhizoctonia solani AG 2-21IIB and AG 4, a methodology was implemented under greenhouse conditions that contemplated the most important criteria regarding to plant-pathogen interaction. The effect of plant growth stage on the development of the disease was evaluated. Seven sugar beet varieties were tested for resistance to R. solani AG 2-2IIIB and AG 4. To detect differences in leaf temperature between/L solani inoculated plants and non-infected plants, an infrared （IR） camera was tested. High incidence of R. solani AG 2-2IIIB and AG 4 in sugar beet plants was evident when the fungal inoculum was applied to two and four weeks old plants. At four weeks after sowing, it was the optimum time to inoculate sugar beet plants in order to generate R. solani infection, since at this time all plants were infected. Significant differences were detected regarding disease incidence between sugar beet varieties inoculated with different anastomosis groups. Leaf temperature was significant different between inoculated and non-inoculated plants, demonstrated that this technique could be a new tool for breeders to screen for resistance of new varieties.

关 键 词：Beta vulgaris inoculation IR-thermal imaging greenhouse test soil-borne pathogen tolerant varieties. 

分 类 号：S435.111.4[农业科学—农业昆虫与害虫防治] S566.3[农业科学—植物保护]