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논문 기본 정보

자료유형
학술저널
저자정보
Hajime Akamatsu (National Agriculture and Food Research Organization) Masayasu Kato (Japan International Research Center for Agricultural Sciences) Sunao Ochi (National Agriculture and Food Research Organization) Genki Mimuro (National Agriculture and Food Research Organization) Jun-ichi Matsuoka (National Agriculture and Food Research Organization) Mami Takahashi (National Agriculture and Food Research Organization)
저널정보
한국식물병리학회 The Plant Pathology Journal The Plant Pathology Journal 제35권 제3호
발행연도
2019.6
수록면
219 - 233 (15page)

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Soybean cultivars susceptible to Phytophthora root and stem rot are vulnerable to seed rot and damping-off of seedlings and young plants following an infection by Phytophthora sojae. In this study, the disease responses of Japanese soybean cultivars including currently grown main cultivars during the early growth stages were investigated following infections by multiple P. sojae isolates from Japanese fields. The extent of the resistance to 17 P. sojae isolates after inoculations at 14, 21, and 28 days after seeding varied significantly among 18 Japanese and two US soybean cultivars. Moreover, the disease responses of each cultivar differed significantly depending on the P. sojae isolate and the plant age at inoculation. Additionally, the treatment of ‘Nattosyo-ryu’ seeds with three fungicidal agrochemicals provided significant protection from P. sojae when plants were inoculated at 14-28 days after seeding. These results indicate that none of the Japanese soybean cultivars are completely resistant to all tested P. sojae isolates during the first month after sowing. However, the severity of the disease was limited when plants were inoculated during the later growth stages. Furthermore, the protective effects of the tested agrochemicals were maintained for at least 28 days after the seed treatment. Japanese soybean cultivars susceptible to Phytophthora root and stem rot that are grown under environmental conditions favorable for P. sojae infections require the implementation of certain practices, such as seed treatments with appropriate agrochemicals, to ensure they are protected from P. sojae during the early part of the soybean growing season.

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Materials and Methods
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