• Korean journal of applied entomology
• /
• v.13 no.3 s.20
• /
• pp.145-149
• /
• 1974

• The Bimonthly Magazine for Agrochemicals and Plant Protection
• /
• v.2 no.8
• /
• pp.57-60
• /
• 1981

• Proceedings of the Korean Society of Crop Science Conference
• /
• 1985.05a
• /
• pp.1-1
• /
• 1985

• Agrochemical news magazine
• /
• v.18 no.1 s.136
• /
• pp.17-21
• /
• 1997

• Korean journal of applied entomology
• /
• v.20 no.1 s.46
• /
• pp.59-66
• /
• 1981

• KOREAN JOURNAL OF CROP SCIENCE
• /
• v.58 no.4
• /
• pp.376-382
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• 2013

Rice sheath blight (ShB), caused by Rhizoctonia solani K$\ddot{u}$hn, is one of the serious fungal disease resulting in severe yield loss in rice field worldwide. There are limited sources of genetic resistance and no commercial cultivar with high level of ShB resistance is currently available in Korea. In order to seek available resources with high level of resistance to ShB, 40 rice germplasms were used to evaluate disease reactions including ShB, leaf blast and bacterial leaf blight and these germplasms also examined agronomic traits such as days to heading, culm length, panicle length, No. of panicles, No. of spikelets per panicle and so on. There is wide variation in agronomic characters and disease reactions. Rice germplasms also showed considerably different ShB reaction caused by inoculation at seedling stage. Areumbyeo, Gayabyeo, IR579-Es44 and IR64 showed more strong reaction to ShB than the others. Especially, Gayabyeo is considerably available to develop a new variety with resistance to ShB in Korea.

• Proceedings of the Korean Society of Crop Science Conference
• /
• 1986.06a
• /
• pp.32-33
• /
• 1986

• Proceedings of the Korean Society of Crop Science Conference
• /
• 1987.06a
• /
• pp.26-27
• /
• 1987

• KOREAN JOURNAL OF CROP SCIENCE
• /
• v.32 no.3
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• pp.302-309
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• 1987

One hundred rice varieties were tested for their level of resistance to sheath blight disease at adult plant stage in field condition through 1984 to 1986. Rice plants were grown under ordinary seasonal culture and inoculated by k-2 fungus isolate during three years. k -1 isolate was also inoculated separately in 1984 and test under late seasonal culture was conducted in separate field in 1985. Degree of damage by the disease observed at 25 days after heading was used to identify the level of resistance of the rice varieties tested. Varietal differences of degree of damage were significant in five tests during three years, and the genotypic variance of degree of damage was always higher than environmental variance among varieties tested. Positive correlations between testing years, between cultural seasons, and between isolates inoculated were found in degree of damage of varieties tested for two or three years continuously. Degree of damage by the disease was correlated negatively with heading date of rice varieties except 1984 tests. Thus, the level of resistance should be compared among the variety group having almost same heading date in field condition, and late and extremely late variety groups should be tested for their level of resistance under appropriate environmental condition. Gayabyo, an early heading variety, and SR9713-54-3, a medium heading breeding line, showed consistent lower value of degree of damage during two or three years. These two varieties were selected as moderate resistant germplasm.

• The Bimonthly Magazine for Agrochemicals and Plant Protection
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• v.7 no.6
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• pp.33-38
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• 1986

한 해의 농사를 마무리짓는 이 시점에서 ''86년도 병해발생상황을 살펴본다는 것은 내년도의 방제계획을 보완한다는 점에서 매우 뜻깊은 계기가 될 것이다. 금년은 매우 특이한 기상으로 초봄에는 충분한 강우로 이앙을 순조롭게 마칠 수 있었으며 이앙초기에는 평년에 비하여 약간 기온이 높았지만 병해초발은 예년과 같이 시작되었다. 그러나 6월 하순과 7월의 저온으로 본논의 초기 및 중기 병해발생은 아주 적은 편이었지만 생육후기에는 잦은 강우로 이삭도열병, 흰잎마름병 등의 발생량이 증가한 반면에 잎집무늬마름병 발생은 아주 적은 해였다. 중$\cdot$만생종 출수기에 특히 남부지방에서 문제시되었던 것은 태풍 Vera호의 건풍동반으로 백수현상이 지역적으로 심한 발생을 보여 수고성 및 흰잎마름병 발생에도 영향을 주었을 것으로 생각된다. 여기서는 금년도 주요병해의 발생특징을 분석해 보고 문제점을 잘 파악하여 내년도의 방제자료로 삼고자 한다.