• 농업기술회보
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• v.49 no.3
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• pp.36-36
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• 2012

최근 벼 재배지역의 일부 품종에서 이화명나방에 의한 피해양상 및 피해정도가 다르게 나타나고 있다. 그동안 발생량과 피해가 적었던 이화명나방이 벼 품종 및 재배환경의 변화로 일부지역에서 발생량 및 피해가 많아 문제해충으로 대두되고 있어 각별한 관리대책이 요구된다.

• Korean Journal of Environmental Agriculture
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• v.19 no.2
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• pp.154-159
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• 2000

This study was carried out to elucidate the symptom of leaf injury to ozone and to determine varietal difference to ozone injury in rice and soybean plant. Ozone was produced by electrostatic discharge in oxygen and was monitored by UV absorption ozone analyzer. The rice leaves were spotted red and rolling leaf edge, discolored to reddish brown or yellowish white in response to ozone, and the leaves that were severely stressed were withered from the tip of leaf. The soybean ones were also discolored to lemon yellow, yellow or dark brown. The leaf injury in both rice and soybean was clearly appeared at the reverse side of leaf and in lower leaves. Milyang 23 and Nonganbyeo among rice cultivars tested were resistant to ozone, but Chucheongbyeo was resistant to it. The ratio of leaf injury was increased and chlorophyll content was decreased as the extension of ozone exposure from 2 to 8 hours in rice. Keunolkong and Danyeopkong among soybean cultivars tested showed resistant reaction to ozone, but Kwangankong and Muhankong were susceptible to it. It was observed that the soybean plants grown for 45 days after seeding were severely damaged by ozone than those of other growth stages.

• The Bimonthly Magazine for Agrochemicals and Plant Protection
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• v.3 no.8
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• pp.67-75
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• 1982

병충해의 방제목적은 벼의 생육기간 중 벼를 병충해로부터 보호하여 피해를 아주 적게 함으로써 경제적 손실을 막는 데 있다. 이른 봄부터 벼농사 준비를 하여 모기르기, 모내기, 초중기 병충해방제를 잘하여 수확을 눈앞에 두게 되었는데 벼농사 후기에 기상재해 특히 병충해방제 소홀로 예상치 못한 피해를 보아 흉년을 보는 예가 흔히 있다. 특히 비래성 해충은 갑자기 폭발적으로 증가하여 혹독한 피해를 줄 수 있으므로 예찰정보 및 병충해 발생경보등에 귀를 기우려 사전방제에 철저를 기해야 하겠다.

• Korean journal of applied entomology
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• v.24 no.2 s.63
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• pp.79-83
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• 1985

Plant damages and yields of the different rice cultivars to brown planthopper (BPR), Nilaparvata lugens S., were observed for the evaluation of varietal resistance in paddy fields. Twenty nine Korean cultivas were transplanted in paddy fields with three plots of no insecticide, no insecticide and fungicide, and no fungicide at Haenam, southern coastal area in 1983. Among 6 varieties with BPR resistant genes, Samgang, Gaya, Hangangchal, and Cheongcheong showed very low populations of BPR and no damages on all treatments. Milyang 30 and Wonpung among them had considerable populations of BPR. Seokwang and 23 others showed high populations and serious damages. Yield increasea(%) with insecticides were low on Gaya(12%), Samgang(29%) and Hangangchal(35%), but very high on Bongkwang(260%), Palgueum(223%), Songjeon(200%), and Guanauk(200%).

• Korean journal of applied entomology
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• v.49 no.4
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• pp.343-349
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• 2010

The golden apple snail was introduced to the Korea from Japan as a potential food for people in 1983. It is one of the pests of direct-seeded rice in korea. This study was conducted to investigate rice(Oriza sativa) consumption and the extent of damage by the golden apple snail(Pomacea canaliculata) in direct-sown paddy fields. Food consumption of the golden apple snail was highest at $30^{\circ}C$. When the emergence of the 1st, 3rd, and 5th leave of rice supplied food, the consumption of young(shell height 15mm) and adult golden apple snail(over shell height 30mm) at $30^{\circ}C$ were 19.0/79.8, 11.0/54.5, 5.5/18.5, and 0.0/2.0 individuals, respectively. Young rice seedings(before 5th leaves of rice) are very susceptible to golden apple snail damage because the young, tender leaves and stems favor the snail's feeding habits. The field experiment with four treatments (0, 2, 5 and 10 individuals respectively per 10 $m^2$) was carried out. The most serious yield loss was 16% from the plot with 10 adults released at emergency stage of rice.

• Korean journal of applied entomology
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• v.36 no.2
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• pp.141-144
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• 1997

Studies were conducted to investigate the incidense of insect pests in transplanted and direct seeded paddy fields in southern region of Korea. Population dencities of the rice green leafhopper (RGLH: Nephotettix cincticeps Uhler) and rice leaffolder (RLF: Cnaphalocroch medinalh Guenee) were higher in machine transplanted than in direct seeded, but the brown planthopper (BPH: Nilaparvata lugens Stal) and smaller brown planthopper (SBPH: Laodelphax striatellus Fallen) were abundant in direct seeded. However, no significant difference was found between machine transplanted and direct seeded fields in the incidense of rice stem borer (RSB: Chilo suppressalis Walker), whiteback planthopper (WBPH: Sogatella furcifera Horvath), and rice stem magot (RSM: C'hlorops oryzae Matsumura). Occurrence of rice key pests were affected more by transplanting time than other cultural practices. Later transplanting induced higher populations of BPH, WBPH, SBPH, RGLH. However, RSB and RLF caused higher damage in earlier transplanted paddy field.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.42 no.4
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• pp.373-377
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• 1997

The bird repellent, methiocarb 50% WP, has been used to reduce the bird damage in the crop field in the European countries. The bird damage occaisonally would occur in the wet direct seeded rice and in soybean field, and resulted in decreasing the crop productivity by the reduction of seedling emergence rate. In this experiment, rice seeds, Hwasungbyeo(Oryza sativa), were coated with the different application rate of methiocarb, 5, 10 and 15 per kg seed, and soybean, Taegwangkong(Glycine max), 2.5, 5.0 and 7.5g. In rice, the seeds coated with 10 and 15g of methiocarb were not lost by bird, while those with 5g and control were lost to 37 and 50% of total seeds, respectively. No damage by birds was observed in rice seedling when the coleoptile and radicle of rice were emerged at 7 days after the water seeding. The crop injury of methiocarb reducing the emergence rate of seedlings, shortening the shoot length, and decreasing the leaf number was occurred at the treated of methiocarb 15g per kg seed. In soybean, the loss of the sprouting by birds was lower in the treatment of methiocarb 7.5g per kg seed than that in both the control and the treatments of methiocarb, 2.5 and 5.0g per kg seed. No crop injury by the treatment of methiocarb was observed in all application rate.

• 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.

• 농업기술회보
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• v.49 no.4
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• pp.21-22
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• 2012

벼 흰잎마름병은 벼에 발생하는 중요한 세균병 중 하나로 우리나라 벼 재배에서 가장 큰 피해를 주고 있다. 한 번 발생하면 치료가 힘든 병으로 알려져 있어 예방위주로 철저히 방제해야 수량감소와 쌀의 품질저하를 막을 수 있다.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.42 no.1
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• pp.56-60
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• 1997

In order to investigate the relationships between the responses of four crops (rice, soybeans, potatoes, and red pepper) to acid rain, the simulated acid rain(SAR) of pH 1.8, 2.3, and 2.8 and normal rain of pH 6.0 were applied from 30 days after emergence to harvest at the two-week interval for rice, soybeans and red pepper and at a week interval for potatoes. SAR of pH 1.8 and 2.3 caused brown spots in the leaves of rice, soybeans, and red pepper and the damages were severer as the pH of SAR lowered, while no visual damages were observed in potatoes. The SARs did not affect chlorophyll content of rice and potatoes, while chlorophyll content of soybeans and red pepper decreased as the pH of SAR lowered. Photosynthetic activity was not significantly different among the pHs of SAR in rice, while decreased as pHs of SAR lowered from pH 2.8 to 1.8 in soybeans, potatoes, and red pepper. Yield of rice, soybeans, and potatoes was not affected by the pHs of SAR, but in red pepper the length, diameter, and weight of a fruit, the number of fruits per plant, and total matured fruit yield decreased as the pHs of SAR lowered. In rice and potatoes visual damages caused by SAR did not correlated with other observed traits. However, visual damages were negatively correlated with chlorophyll content and photosynthetic activity of soybeans and photosynthetic activity and yield of red pepper.