• Korean journal of applied entomology
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• v.12 no.4 s.17
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• pp.157-164
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• 1973

• Korean journal of applied entomology
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• v.33 no.3
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• pp.173-177
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• 1994

his study was conducted to Investigate the occurrence of small brown planthopper (SBPH), LaodeIpahx striatellus Fallen, and the ind~cence 01 rice virus diseases by d~fferent seeding dates in dryseeded rice. The occurrerlce of SBPH was the highest an nce seeded in May 11, followed byMay 1, May 21 and May 31. However. SBPH dld not occur on the rice seeded in June 10 duelo the rice was emerged after peak occurrence of first generailon adult of SBPH. The occurrenceof the first generation adult of SBPH was May 11 and it was 3-day earlier than that of infantnce transplanting. The ~nd~cencofe rice vlrus diseases, rice stripe vilus (RSV) and rice black-streakeddwarf virus (RBSDV), was the most severe at seeding date May 11. and then followed by May1, May 21 and May 31 Thus the incidence of "ce virus diseases was closely related with thedensity of the first generat~on adult of SBPH Rice yield was decreased by later seeding dates, although rice yield from May 1 to May 21 was relatively stable and hqii compared with laterseeding dates. Accordingly, there was slgniilcant relatlonsh~p between rice yield and seeding datesice yield and seeding dates

• Korean journal of applied entomology
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• v.12 no.4 s.17
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• pp.168-168
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• 1973

• Korean journal of applied entomology
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• v.12 no.4 s.17
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• pp.165-167
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• 1973

• Korean journal of applied entomology
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• v.16 no.2 s.31
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• pp.121-125
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• 1977

This is the first report on. rice black-streaked dwarf virus in Korea. The occurrence of this virus in Korea was confirmed by symptoms On rice Plants, Vector transmission and microscopic Observation in 1975. The smaller brown planthopper, Laodelphax striatellus FALLEN, transmits this virus which is spherical with a diameter of about 60 nm. Higher infection was observed in earlier transplanted rice with higher levels of fertilizer than in normal and standard cultivation fields.

• Research in Plant Disease
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• v.18 no.3
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• pp.245-249
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• 2012

The small brown planthopper (Laodelphax striatellus) is one of the most important rice pests in Republic of Korea because it damages rice plants not only by sap-sucking but also by transmitting Rice stripe virus (RSV). Outbreaks of RSV are closely related to outbreaks of the small brown planthopper (SBPH). Therefore, it is very important to control SBPH for the management of RSV. Mass-migrating SBPH collected by aerial net traps in June 2011 at Taeanup, Geunheungmyon and Gonammyon in Taeangun were examined for virus carrier status and effects of the pesticide, 'Myungtaja', on the control of RSV. Among 1,217 SBPH trapped, about 7.7% were detected as RSV positive and 4.4% were positive for Rice black streak dwarf virus (RBSDV) by RT-PCR. After the mass migration, pesticide 'Myungtaja' was sprayed once or twice on rice fields and compared to untreated fields. The incidence of RSV was not affected by the frequency of spraying 'Myungtaja' but was influenced by the time of pesticide treatment. Myungtaja' treatment within 5-7 days after mass migration resulted in the most efficient RSV control, resulting in RSV incidence decreased by 87.6% compared to the control. Therefore, we conclude that pesticide spraying for RSV control was most effective when it was done within 5-7 days after mass migration.

• The Bimonthly Magazine for Agrochemicals and Plant Protection
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• v.8 no.4
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• pp.21-27
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• 1987

우리나라에서 지금까지 벼에 발생하는 바이러스병으로 알려져 있는 것은 줄무늬잎마름병(縞葉枯病), 오갈병(萎縮病), 검은줄무늬오갈병(黑條萎縮病)의 3종류가 있다. 그 중 가장 근년에 알려진 검은줄무늬오갈병은 1973년 경북 선산지방에서 처음으로 발견되어 1975년 검은줄무늬오갈병으로 확인된 이후 남부지방은 물론 중부지방까지 확산 피해를 주고 있다. 더욱 기계이앙기 보급으로 조식면적이 늘어남에 따라 이모작 지대(二毛作地帶) 일부에서는 피해가 심한 실정이다. 전남 보성군 조성지역은 전남지역에서 대표적인 남부 미맥(米麥) 이모작지대로 알려져 있는데 1984년에는 벼 검은줄무늬오갈병이 지금까지 보기드물 정도로 극심하게 발생되어 일부 포장에서는 벼 수확에 개무(皆無) 상태를 보인 바 있어 이와같은 피해를 다소나마 줄여 보고자 그동안 조사된 시험성적을 중심으로 피해상황과 방제법을 간단히 소개하고자 한다.

• The Bimonthly Magazine for Agrochemicals and Plant Protection
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• v.4 no.11
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• pp.6-13
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• 1983

• Proceedings of the Korean Society of Plant Pathology Conference
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• 1998.06a
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• pp.164-165
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• 1998

• Korean Journal Plant Pathology
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• v.2 no.1
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• pp.17-21
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• 1986

The viruliferous vectors of the rice dwarf virus, nymphs of Nephotettix cincticeps did not overwinter in Uljin, although the disease occurred in fields. When considered the relationship between seasonal changes of vector and disease occurrence, there were 5 and 3 peaks in a year in occurrence of vector and disease, respectively. The over­wintered adults and the nymphs of the 2nd and 3rd generation served as the major transmittor of the. virus. In a field where the disease has been a problem for years, the ratoon hills rice cultivar Milyang No. 30 was infected $22.4\~26.8\%$ with the rice dwarf virus. When nonviruliferous nymphs were fed on the infected ratoon hills for 11 to 30 days, viruliferous nymphs overwintered, increased to $13.0\~18.2\%$. The winter barley infected with rice dwarf virus did not survive in winter, suggesting that infected barley may not serve as a inoculum source.