• Title/Summary/Keyword: 마름

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Fungicides for Dollar Spot Suppression on Creeping Bentgrass Greens (크리핑 벤트그래스 그린에서 동전마름병 방제)

  • Settle, Derek;Lee, Sang-Kook;Kane, Randy
    • Asian Journal of Turfgrass Science
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    • v.25 no.1
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    • pp.43-47
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    • 2011
  • Creeping bentgrass (Agrosis stolonifera L.) is regarded to be the most widely used cool-season turf grass species grown on golf greens and fairways in temperate climates of North America. Creeping bentgrass is highly susceptible to the fungal disease 'dollar spot' caused by Sclerotinia homoeocarpa. Dollar spot is a foliar disease favored by conditions of high humidity, warm days, and cool nights. Studies using Aliette Signature (Fosetyl Aluminum formulated with a green pigment) mixed with another broad-spectrum fungicide do not always provide additional visual quality benefits compared to the fungicide alone. The exact mechanism for improved summer visual quality, when it occurs, is not known. Fertility management and environment likely contribute. The object of this study is to evaluate fungicide strategies for control of dollar spot and effect on visual quality during summer and on an L-93/G-2 creeping bentgrass green. Nine fungicide combinations were used for this study. Disease control and visual quality by fungicides was evaluated on an established G-2/L-93 creeping bentgrass green at 3-hole Sunshine Golf Course in Lemont, IL. All fungicide combination showed excellent dollar spot suppression except Fore throughout the study. Visual quality of greens by addition of Aliette Signature is enhanced when bentgrass growth is compromised and slow. Dollar spot levels in Fore plots increased to 30% on 14 August, and was no different than untreated plots. Unacceptable quality by Fore was due to lack of dollar spot control.

Occurrence of Hull Dehydration of Rice in Honam Plain Area in 1998 (호남평야지에서 1998년 벼알마름 현상 발생)

  • Sang-Su Kim;Bong-Kyu Park;Min-Gyu Choi;Weon-Young Choi;Nam-Hyun Back;Won-Ha Yang;Jeong-Taek Lee
    • Korean Journal of Agricultural and Forest Meteorology
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    • v.3 no.3
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    • pp.150-155
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    • 2001
  • The hull dehydration in dough stage did not serious affect the rice yield though grain appearance texture may decline by severe occurrence of the symptom. As to white head in heading stage of rice, the occurrence of hull dehydration in 1998 was directly affected by high temperature, low air humidity and sometimes of strong wind and sunshine in early September. At harvest stage, 1,000-grain weight of brown rice was not found to be significantly different between the hull dehydrated grains and normal ones. That reason can be considered that the hull dehydration occurred hill was not injured on the leaf and rachis branches therefore the function of assimilation and translation of rice plant was not affected. The ratio of imperfect rice kernel such as green, cracked and white belly increased. The increase of cracked rice by the hull dehydration may caused by concurrent dehydration of kernel, or by insufficient water supply into kernel due to breaking of vascular bundles in glume.

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A Rapid and Simple Detection Assay for Rice Bacterial Leaf Blight by Recombinase Polymerase Amplification (벼 흰잎마름병의 신속하고 간편한 진단을 위한 Recombinase Polymerase Amplification 등온증폭법)

  • Kim, Shinhwa;Lee, Bong Choon;Kim, Hyun Ju;Choi, Soo Yeon;Seo, Su Jwa;Kim, Sang-Min
    • Research in Plant Disease
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    • v.26 no.4
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    • pp.195-201
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    • 2020
  • Rice bacterial leaf blight (BLB) by Xanthomonas oryzae pv. oryzae (Xoo) is considered to be one of the major rice diseases steadily occurring around the rice-producing countries. In this study, we developed a recombinase polymerase amplification (RPA) assay for the rapid, convenient and specific diagnosis of Xoo by targeting Xoo-specific transposase A gene. As the target gene can be amplified in 10 min without DNA extraction process and special equipment for temperature control, RPA for BLB can be useful and practical component for on-site diagnosis.

Influence of Late Summer Fertilizer on the Yield and Cold Damage of Mulberry in Kangwon Province (강원도 지방의 뽕밭에서 철늦은 여름 덧거름이 수량 및 가지끝마름에 미치는 영향)

  • 김기석;최지형
    • Journal of Sericultural and Entomological Science
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    • v.35 no.1
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    • pp.17-20
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    • 1993
  • Cold damage of mulberry in Kangweon Province is generally higher that of other provinces. Farmers suspected cold damage caused from late summer fertilizer. To understand the effect of late summer fertilizer. To understand the effect of late summer fertilizer, two additional summer fertilizer times, August 10 and 20, were compared with conventional time(June, 20). Mulberry yield increased by 10~30% in 1m middle cut, and 10~17% in leaf picking method in August 10 treatment, compared with conventional. Additional summer fertilizer did not increase cold damage rate of branches. Leaf yield in leaf picking was higher by 6~29% that that of 1m middle cut.

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오갈병 발생 현황과 매개중에 관한 조사 연구

  • 김영택;백현준;정봉조
    • Journal of Sericultural and Entomological Science
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    • v.15 no.2
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    • pp.68.2-68
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    • 1973
  • 1. 오갈병은 전국에 분포하고 최근지역에 따라 3∼4배씩 매년 발생이 급증한다. 2. 마름무늬 매미충은 1년 3세대 발생하며 1세대가 5월중순-7월초순이고 2세대가 7월중순-8월중순이며 3세대는 8월하순부터 10월초까지였다. 3. 마름무늬 매미충 산란은 가지의 하부에 산란하는 것이 많다. 4. 마름무늬 매미 충 월동란은 4월 24일에 안점기에 달하고 5월 5일부터 부화 시작한다.

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조경수에 발생되는 병해-수지가 많이 흘러나오는 푸사리움가지마름병

  • 이상현
    • Landscaping Tree
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    • s.106
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    • pp.23-24
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    • 2008
  • 최근 소나무류에서 많이 발생되고 있는 푸사리움가지마름병은 외국의 경우 pitch canker(수지궤양병)라 불리며, 그 유래는 가지, 순, 노출된 뿌리에 발생한 궤양에서 많은 양의 수지가 흘러나오는데서 이름 지어 졌다. 우리나라에서는 1995년도 도입된 리기다소나무에서 이 병이 발견되었으며, 점차 그 피해가 증가하고 있는 실정이다. 푸사리움가지마름병은 미국의 남동부지역 플로리다에서 1946년에 처음 보고되었으며, 조림지, 종자원 묘포장에서 만성적으로 발생되고 있는 병으로 1976년 이후 이병은 지역적인 질병에서 국가적이고 범세계적인 중요 질병으로 발달하였다.

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기획시리즈 - 조경수에 발생되는 병해 -소나무류에 피해를 주는 피목가지마름병-

  • Lee, Sang-Hyeon
    • Landscaping Tree
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    • s.110
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    • pp.18-19
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    • 2009
  • 피목가지마름병은 Cenangium ferruginosum에 의하여 발생되는 병해로 전 세계적으로 적송, 곰솔, 잣나무 등의 소나무류에 흔히 발생하며, 특수한 경우를 제외하면 일반적으로 피해는 경미하게 나타난다. 하지만 최근 남부지역 소나무류 집단고사는 강수량 부족에 의한 스트레스가 유인되어 수세가 약화된 상태에서 피목가지마름병의 피해가 가속화된 것으로 추정되며, 이 병은 기상요인과 관련이 높기 때문에 가지치기, 임목밀도조절 등 재배환경을 조절하고 관리가 잘 되도록 신경을 써야 피해를 줄일 수 있다.

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