Study on the Cause Damping-off in Quinoa (Chenopodium quinoa Willd.) and a Method for Suppressing its Occurrence

日本作物学会紀事

Katsunori Isobe^1¹  Tsuyoshi Sugiyama^2²  Motoi Katagiri^3³  Chihiro Ishizuka^4⁴  Yumi Tamura^5⁵  Masao Higo^6⁶  Yoshikatsu Fujita^7⁷ 

[1] College of Bioresouce Sciences, Nihon University^1;College of Bioresouce Sciences, Nihon University^2;College of Bioresouce Sciences, Nihon University^3;College of Bioresouce Sciences, Nihon University^4;College of Bioresouce Sciences, Nihon University^5;College of Bioresouce Sciences, Nihon University^6;College of Bioresouce Sciences, Nihon University^7

关键词: Cause of occurrence;    Damping-off;    Quinoa (Chenopodium quinoa Willd.);    Soil moisture;    Suppression method;   

DOI  :  10.1626/jcs.88.117

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

Damping-off is one of the most threatening factor for quinoa growth and yield. In this study, to clarify the cause of the occurrence and to find a method to suppress of damping-off in quinoa (Chenopodium quinoa Willd.), we carried out field experiments in the experimental field at Nihon University from 2014 to 2017. The damping-off ratio remarkably varied with the sowing time. Damping-off occurred from the emergence stage to fourth leaf stage at all sowing times, but, not after the fourth leaf stage. The reason for the difference in damping-off ratio with the sowing time was not the difference in temperature or sunshine hours but the difference in precipitation. The damping-off ratio was also decreased under a lower soil moisture condition. Thus, one method to suppress damping-off was to decrease the soil moisture at an early growth stage. There were no significant differences in the damping-off ratio among 12 cultivars. Rhizoctonia spp. and Fusarium spp. were observed from the seedlings with damping-off symptoms. We considered that those fungi caused damping-off in quinoa seedlings. Damping-off was suppressed by the broadcasting of more than 2g per m2 of Dakoreto wettable powder to the soil surface. From this study, we identified a cause of damping-off in quinoa and suggested a method to suppress damping-off in quinoa.

【 授权许可】

CC BY