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원옥재,가유강,이증주,김진원,이정란,박기웅,Won, Ok Jae,Jia, Wei Qiang,Lee, Jeung Joo,Kim, Jin-Won,Lee, Jeongran,Park, Kee Woong 한국잡초학회한국잔디학회 2018 Weed & Turfgrass Science Vol.7 No.3
본 연구는 충청남도에서 ALS 제초제 저항성 논 잡초의 발생과 분포를 조사하기 위해 2017년도에 수행되었다. 충청남도 전체 논 재배면적의 47.0%인 64,782 ha에서 제초제 저항성 논 잡초가 발생하였다. 상위 5개 시 군별 제초제 저항성 잡초 발생면적은 서산시 11.9%, 논산시 11.1%, 당진시 10.9%, 보령시 9.2%, 아산시 7.8% 순이었다. 제초제 저항성 잡초종별 발생을 보면 물달개비가 가장 많았고, 다음으로 미국외풀, 올챙이고랭이, 강피, 알방동사니, 벗풀 순이었다. 제초제 저항성 물달개비, 미국외풀, 올챙이고랭이는 충청남도 전역에 분포하였으며, 벗풀은 당진시에서만 발생하였다. 2011년도 제초제 저항성 잡초 조사와 비교하여 제초제 저항성 잡초 발생면적은 감소하였으나, 제초제 저항성 잡초 발생률은 2011년도의 47.6%와 유사하였다. 제초제 저항성 잡초를 방제하기 위해서는 흔히 다른 작용기작을 지닌 제초제들과 병용하거나 교호로 처리하여야 하며 제초제 저항성 잡초의 주기적인 모니터링과 종합적인 제초제 저항성 관리체계가 필요하다. This study was conducted to investigate the occurrence and distribution of herbicide resistant weeds at rice fields in Chungnam province of Korea in 2017. Herbicide-resistant weeds occurred in 64,782 ha, which comprise 47.0% of the total paddy field area of Chungnam province. The infested area of herbicide resistant weeds was estimated in Seosan-si (11.9%), Nonsan-si (11.1%), Dangjin-si (10.9%), Boryeong-si (9.2%) and Asan-si (7.8%). The most dominant herbicide resistant weeds in rice fields were Monochoria vaginalis, followed by Lindernia dubia, Schoenoplectus juncoides, Echinochloa oryzicola, Cyperus difformis and Sagittaria trifolia. Herbicide resistant M. vaginalis, L. dubia, and S. juncoides occurred throughout Chungnam province, and herbicide resistant S. trifolia was only found in Dangjin-si. Compared with the 2011 survey, the infested area of herbicide-resistant weeds decreased, but the incidence rates were similar. The herbicide rotation with different modes of actions across growing seasons is recommended to control herbicide-resistant weeds in the infested fields. It is necessary to monitor herbicide resistance regularly and conduct integrated herbicide resistance management in this area.
Herbicidal activity and crop injury of aqueous extracts of sorghum leaves
원옥재,로미즈 우딘,변종영,Won, Ok-Jae,Uddin, Md. Romij,Pyon, Jong-Yeong Institute of Agricultural Science 2011 Korean Journal of Agricultural Science Vol.38 No.2
Herbicidal effects and crop selectivity of aqueous leaf extracts of sorghum (Sorghum bicolor L.) were evaluated against several weed species for developing sustainable weed management in organic farming. Aqueous sorghum leaf extracts were highly phytotoxic to different weed species. No broadleaf weeds were germinated in the concentration of 5 fold or higher concentrated sorghum leaf extracts and 90% of seed germination was inhibited within that range in grass species. Sorghum leaf extracts strongly inhibited the growth of different weeds by pre-emergence and foliar applications in greenhouse condition. Foliar application of sorghum leaf extracts had a higher inhibitory effect than the pre-emergence application. Broadleaf weed species were more susceptible than grasses to the application of sorghum leaf extract in foliar applications than grasses. Galium spurium, Erigeron candensis, and Rumex japonicus were completely killed at the highest concentrated sorghum leaf extract both in pre-emergence and foliar application. Most broadleaf weed species were inhibited more than 80% at pre-emergence application at 50 fold concentrated sorghum leaf extract. G. spurium, E. candensis, R. japonicus, Eclipta alba, Plantago asiatica and Portulaca oleraeea were most susceptible to sorghum leaf extract in foliar application. Growth of most broad leaf weed species was suppressed by greater than 90% at 50 fold concentrated sorghum leaf extract. Most crop species were tolerant to sorghum leaf extract but shoot growth was slightly reduced by the application of 40~50 fold concentrated extracts, Sorghum leaf extract may used to control weeds in organic fanning without affecting the growth of crop.
Benzobicyclon 혼합제의 제형 및 처리시기가 제초활성 및 벼 생육에 미치는 영향
원옥재(Ok Jae Won),정종휘(Jong Hee Jeong),송재은(Jae Eun Song),박수혁(Su Hyuk Park),황기선(Ki Seon Hwang),한성민(Sung Min Han),변종영(Jong Yeong Pyon),박기웅(Kee Woong Park) 충남대학교 농업과학연구소 2013 농업과학연구 Vol.40 No.4
This study was conducted to evaluate the efficacy of two different formulations and application timings of benzobicyclon+penoxsulam+pyrzaosulfuron-ethyl (BPP) in rice field. BPP granule (GR) and tablet (TB) controlled more than 90% of four weed species 10 and 15 days after sowing in direct seeding when compared with untreated control. BPP TB was highly effective to control herbicide resistant Scirpus juncoides and Monochoria vaginalis both 10 and 15 days after transplanting (DAT). BPP GR controlled 94.0 and 96.5% of S. juncoides and M. vaginalis, respectively 10 DAT, but its efficacy decreased to 88.5 and 49.8% respectively 15 DAT. When compared with untreated control, no visual injuries were detected at 255 and 510 g a.i./ha of BPP. The yield of rice increased in both BPP GR and TB in transplanting and direct seeding rice cultivation when compared with untreated control. Based on these data, early application (10 DAT) of BPP GR and TB can be applied to provide effective weed control, especially in the field infested with herbicide resistant weed species.
원옥재(Ok Jae Won),서은지(Eun Ji Suh),박재성(Jae-Sung Park),홍서연(Seo-yeon Hong),박진기(Jin-Ki Park),류종수(Jong-Soo Ryu),한원영(Won-Young Han),한길수(Kil Su Han),송득영(Duk Young Song),정태욱(Tae Wook Jung),김성우(Sung Woo Kim),배진우 한국잡초학회·한국잔디학회 2021 Weed & Turfgrass Science Vol.10 No.1
본 연구는 참깨의 수확 효율 개선을 위한 건조제의 선발 및 안전사용법 확립을 목적으로 수행되었다. 참깨 수확 20, 15, 10, 5일전에 건조제로써 비선택성 제초제인 글루포시네이트 암모늄 액제, 글루포시네이트-피 액제, 플루티아셋메틸 + 글루포시네이트 암모늄 액제, 티아페나실 미탁제를 처리한 결과, 지상부의 건조효과는 티아페나실이 가장 빨랐다. 건조제 처리에 따른 꼬투리의 열림은 수확 15일과 20일전 처리시 각각 50%와 90% 내외로 나타났다. 참깨의 수확량은 수확 10일전 처리에서 가장 높았으며, 그 다음은 수확 15, 5, 및 20일전의 순이었다. 천립중은 수확 5일전 처리부터 15일전 처리까지 유사하였다. 수확된 종자의 발아율은 수확 5일전과 10일전 처리에서 90% 이상을 보였다. 참깨 종자의 잔류 분석 결과, 공시된 여러 건조제 중 티아페나실 처리에서만 해당 성분이 기준량 이하로 검출 되었으므로 참깨 수확기 건조 제로는 티아페나실이 가장 적합할 것으로 향후 적용을 위해서는 작물잔류 시험과 후작물 시험이 필요할 것으로 보인다. This study was conducted to select a desiccant improving the harvesting efficiency of sesame seeds and establishing a safe use method. Non-selective herbicides such as glufosinate ammonium SL, glufosinate-P SL, fluthiacetmethyl+glufosinate ammonium SL, and thiafenacyl ME were used as a desiccant 20, 15, 10, and 5 days before sesame harvesting. The drying effect of the above-ground part of sesame was fastest in Tiafenacil treatment. The opening of the pods was around 50% and 90% in the desiccant treatment 15 and 20 days before harvesting, respectively. The yield of sesame seeds was highest 10 days before harvesting, followed by 15, 5 and 20 days before harvesting. Thousand-grain weight in the treatment 5 days before harvesting was similar to the treatment 15 days before harvesting. The germination rate of seeds was more than 90% in the treatment 5 and 10 days before harvesting. As a result of residual analysis of sesame seeds, it was predicted that Tiafenacil would be the most suitable desiccant in sesame because the corresponding component was detected below the standard amount only in the treatment of Tiafenacil among several tested desiccants.
Herbicidal activity and crop injury of aqueous extracts of sorghum leaves
Ok Jae Won(원옥재),Md Romij Uddin(로미즈 우딘),Jong Yeong Pyon(변종영) 충남대학교 농업과학연구소 2011 농업과학연구 Vol.38 No.2
Herbicidal effects and crop selectivity of aqueous leaf extracts of sorghum (Sorghum bicolor L.) were evaluated against several weed species for developing sustainable weed management in organic farming. Aqueous sorghum leaf extracts were highly phytotoxic to different weed species. No broadleaf weeds were germinated in the concentration of 5 fold or higher concentrated sorghum leaf extracts and 90% of seed germination was inhibited within that range in grass species. Sorghum leaf extracts strongly inhibited the growth of different weeds by pre-emergence and foliar applications in greenhouse condition. Foliar application of sorghum leaf extracts had a higher inhibitory effect than the pre-emergence application. Broadleaf weed species were more susceptible than grasses to the application of sorghum leaf extract in foliar applications than grasses. Galium spurium, Erigeron candensis, and Rumex japonicus were completely killed at the highest concentrated sorghum leaf extract both in pre-emergence and foliar application. Most broadleaf weed species were inhibited more than 80% at pre-emergence application at 50 fold concentrated sorghum leaf extract. G. spurium, E. candensis, R. japonicus, Eclipta alba, Plantago asiatica and Portulaca oleraeea were most susceptible to sorghum leaf extract in foliar application. Growth of most broad leaf weed species was suppressed by greater than 90% at 50 fold concentrated sorghum leaf extract. Most crop species were tolerant to sorghum leaf extract but shoot growth was slightly reduced by the application of 40~50 fold concentrated extracts, Sorghum leaf extract may used to control weeds in organic fanning without affecting the growth of crop.