마늘 저장 중 부패병 방제를 위하여 처리한 농약의 경시적 농약 잔류량 평가

유오종(Oh Jong You),진용덕(Yong Duk Jin),황세구(Se Gu Hwang),이용훈(Yong Hoon Lee),임양빈(Yang Bin Ihm),김진배(Jin Bae Kim),권오경(Oh Kyung Kwon),경기성(Kee Sung Kyung),김장억(Jang Eok Kim) 한국농약과학회 2009 농약과학회지 Vol.13 No.3

We tested and selected some agrochemicals reducing the occurrence of major pests and diseases during garlic storage. Tebuconazole, diphenylamine and prochloraz as fungicides and dimethate as a insecticide were sprayed or drenched before harvest. And the harvested garlic was dipped in each of the agrochemicals. The residues of pesticides in garlic bulbs treated were analyzed every month from harvesting time for 6 months. In case of Danyang garlic, which was treated with pesticides before and after harvesting, the residues of diphenylamine, tebuconazole, prochloraz, and dimethoate ranged from 0.008 to 0.28, from 0.03 to 0.32, from 0.02 to 0.12, and from 0.02 to 0.25 ㎎/㎏, respectively. In case of Uiseong garlic, the residues of diphenylamine, tebuconazole, prochloraz and dimethoate ranged from 0.008 to 0.09, from 0.08 to 0.45, from 0.02 to 0.57, and from 0.04 to 0.38 ㎎/㎏, respectively. And, in case of Namdo garlic, the residues of diphenylamine, tebuconazole, prochloraz, and dimethoate ranged from 0.008 to 0.52, from 0.07 to 1.67, from 0.02 to 0.17, and from 0.03 to 0.73 ㎎/㎏, respectively. Some of the garlic samples treated with tebuconazole exceeded its maximum residue limits (MRLs) of 0.1 ㎎/㎏ set by Korea Food Drug Administration (KFDA), but dimethoate was detected below its MRL of 1.0 ㎎/㎏. In case of diphenylamine and prochloraz, their MRLs for garlic were not set. Adapting their MRLs, 5.0 ㎎/㎏ of diphenylamine for apple and pear and 0.5 ㎎/㎏ of prochloraz for strawberry and grape, residue levels of diphenylamine and procloraz were below than their MRLs, with the exception of samples two times treated with procloraz in Namdo garlic. These results indicate that dimethoate can be used as an agrochemical to control the postharvest disease in garlic in only MRL aspect.

마늘 저장 중 마름썩음병과 푸른곰팡이병 억제를 위한 농약의 살균활성

유오종(Oh Jong You),이용훈(Yong Hoon Lee),진용덕(Yong Duk Jin),김진배(Jin Bae Kim),황세구(Se Gu Hwang),한상현(Sang Hyun Han),김장억(Jang Eok Kim) 한국농약과학회 2007 농약과학회지 Vol.11 No.4

The major fungal diseases which effecting garlic storage are blue mold and dry rot, caused by Penicillium hirsutum and Fusarium oxysporum, respectively. In order to reduce the damage by the pathogenic fungi, here we report the effects of 11 fungicides tested to reduce spoilage during storage of garlics. In the in vitro antimicrobial activity test, the fungicides, diphenylamine, prochloraz and tebueonazole showed 0.3, 2.2, and 1.3 nun inhibition zone to F. oxysporium, and cyprodinil, diphenylamine, fenbuconazole, hexaeonazole, peneonazole, prochloraz, propiconazole, pyrimethanil and tebuconamle exhibited 0.2, 2.4, 0.8, 0.4, 1.2, 1.5, 1.2, 0.4 and 1.5 mm to P. hirsutum, respectively. To test the in vivo control effect, when the diphenylamine, prochloraz, and tebuconazole were treated by standard concentration, the fungal mycelium of F. oxysporium started to grow 5 days after inoculation, and 80, 63.3 and 83.3% of the inoculated cloves are infected 11 days after inoculation. When the tebuconazole were treated by standard concentration, the P. hirsutum was completely inhibited the growth of the fungi. In case of diphenylamine, peneonazole and propiconazole treatment, the P. hirsutum was observed 7 days after inoculation and 20~23.3% of the cloves were infected 11 days after inoculation. When cyprodinil, prochloraz and pyrimethanil were treated, pathogens occurred 5 days after inoculation and 60~100% of the cloves infected 11 days after inoculation. Three fungicides such as diphenylamine, prochloraz and tebuconazole also suppressed remarkably the infection and growth of F. oxysporium and P. hirsutum on garlic when both of the pathogens are inoculated after the garlic cloves were dipped for 10 min in the suspension of each agrochemical. Overall, diphenylamine, prochloraz and tebuconazole showed effective control efficacy on dry rot and blue mold. There was significant correlation between in vitro and in vivo assay in diphenylamine and prochloraz to F. oxysporum and cyprodinil, prochloraz and pyrimethanil to P. hirsutum.

저장 병해 방제를 위하여 처리된 Diphenylamine의 행적

유오종(Oh Jong You),경기성(Kee Sung Kyung),김장억(Jang Eok Kim) 한국농약과학회 2017 농약과학회지 Vol.21 No.2

To elucidate the absorption and mobility of pesticides, radio-labelled compound, [<SUP>14</SUP>C]diphenylamine, was treated for garlic and its radioactivity was measured. Just after labelled and cold compounds were treated together on the garlic leaf, they were spreaded rapidly to the whole leaf. When garlic was dipped in the diluted solution of labelled and cold compound and stored at -4℃ and room temperature, a periodic investigation showed that treated pesticide was lessened in outer skin while it was risen in clove, root, and inner skin. In Danyang garlic stored at -4℃, the distribution of pesticide was higher in outer skin than in inner one but at room temperature it was reversed. In Namdo garlic stored at -4℃ and room temperature, the distribution of pesticide both was 40% higher in outer skin that inner one. When diluted solution of labelled and cold diphenylamine was put into soil, garlic absorbed less than 1% of total treated amount, while the rest was remained in the soil layer of 10 cm depth. The radioactive amount absorbed by garlic was distributed in the order of outer skin > flower stem > inner skin > root > clove.

마늘 수확 후 발생하는 마른썩음병과 푸른곰팡이병 방제를 위한 살균제 효과

박종현(Jong Hyun Park),김장억(Jang Eok Kim),유오종(Oh Jong You) 한국농약과학회 2018 농약과학회지 Vol.22 No.2

This study has investigated on occurrence patterns and control values of dry rot disease and blue mold disease, which occur corruption during the garlic storage. Effectiveness during the storage has inquired for mixture of diphenylamine, tebuconazole and prochloraz. In Danyang traditional garlic, dry rot disease has occurred mainly in the early storage, 0~6 months. If Diphenylamine EC + Dimethoate EC, Tebuconazole WP + Dimethoate EC and prochloraz EC + Dimethoate EC mixtures applied 1 month earlier than the harvest, control effect lasts 3 months storage. If harvested garlics were immersed, Tebuconazole WP + Dimethoate EC mixture has control effect in 2~10 month storage, but level of significance was low. In Namdo garlic, its bulbs have rifts that support clove ventilation so dry rot disease occurred less than Danyang garlic. Occurence was constant in 8 month storage, but increase in April, 10 month storage. In both of Danyang and Namdo garlics, blue mold disease has not occurred so much that control value could not investigated, but has similar occurrence patterns. Rate of corruption during storage was constant in 0~6 month storage, but increases in February next year, 8 month storage. These information above shows that dry rot disease corrupts garlics in the early stage storage and blue mold disease corrupts garlics in the later stage storage.

재배환경, 품종 및 가공 방법에 따른 고추와 고춧잎 중 농약의 잔류 특성

이희동(Hee-Dong Lee),유오종(Oh-Jong You),임양빈(Yang Bin Ihm),권혜영(Hye-Young Kwon),진용덕(Yong-Duk Jin),김진배(Jin-Bae Kim),김윤한(Yun-Han Kim),박승순(Seung-Soon Park),오경석(Kyeong-Seok Oh),고성림(Sung-Lim Ko),김태화(Tae-Hwa Kim) 한국농약과학회 2006 농약과학회지 Vol.10 No.2

Chlorothalonil and imidacloprid sprayed onto the green peppers were degraded more faster at outdoor than in greenhouse. These results were affected by dew and photodegradation, considering no rain during the experimental period. Chlorothalonil, esfenvalerate and imidacloprid in green pepper, green twist pepper and sweet pepper did not show any residual pattern, because green peppers are one of the continuous harvesting crops and pesticides could not be sprayed homogeneously on them. When green peppers were pickled with soy sauce and green twist peppers were fried with vegetable oil, the amounts of pesticides such as alpha-cypermethrin, bifenthrin, chlorfenapyr, esfenvalerate and imidacloprid were diminished to the levels of about 30~71 and 20~41%, respectively. Esfenvalerate and imidacloprid could not be detected in 2 month-old hot pepper paste. The removal rates of pesticide residues in leaves of green peppers were about 22~37% by washing, about 74~95% by parboiling, and about 17~55% by drying after parboiling.

유색미 도입 유전자원의 생육 및 품질특성 변이 다변량 분석

박종현,이지윤,전재범,유오종,손은호,Park, Jong-Hyun,Lee, Ji-Yoon,Chun, Jae-Buhm,You, Oh-Jong,Son, Eun-Ho 한국작물학회 2018 한국작물학회지 Vol.63 No.3

The aim of this study was to evaluate the variation of growth and quality characteristics in colored rice from 178 accessions and to develop useful, basic rice breeding data by classifying these germplasm characteristics via principal component (PC) analysis. The coefficient of variation of the 178colored rice accessions were the highest for panicle length (PL) and protein contents, followed by length-width ratio (LWR), 1000-grain weight (TGW), culm length (CL), and amylose contents, whereas the lowest was for the number of panicles per hill (NP), which is a yield component. The results from the PC analysis exhibited eigenvalues and contributions respective to each PC as follows: PC1, 2.06 and 29.49%; PC2, 1.31 and 18.75%; PC3, 1.21 and 17.36%; PC4, 1.01 and 14.38%. The eigenvalues of four PCs were over 1.0, and their cumulative contributions were 79.98%, which completes the necessary condition for evaluation of the 178 colored rice accessions. Cluster analysis showed cluster I as the largest, which included 79 accessions, while clusters II, III, IV, V, VI, and VII comprised 46, 19, 13, 4, 8, and 9 accessions, respectively. Moreover, dark brown accessions were dispersed in clusters I and II, and many resources of purple seed coat color were found in clusters V, VI, and VII. Particularly, cluster V had resources of only black and purple seed coat colors. Resources of cluster VII were found to have a relatively small average CL, PL, and LWR; notably, cluster V had the smallest average TGW, and cluster IV the lowest NP but the highest TGW. Finally, considering the yield potential, growth characteristics, heading stage, and color during breeding of colored rice, we obtained the following conclusions: cluster VII is suitable for breeding of colored rice; cross breeding among clusters I, II, and VII has a high yield potential; and it is possible to produce a superior color by cross breeding plants from cluster V and VI.

Adjuvant에 의한 농약살포액의 물리성 개선 및 약효증진 효과

진용덕(Yong-Duk Jin),이희동(Hee-Dong Lee),유오종(Oh-Jong You),김진배(Jin-Rae Kim),권오경(Oh-Kyung Kwon) 한국농약과학회 2008 농약과학회지 Vol.12 No.4

This study was carried out to elucidate the effects of adjuvants on physicochemical properties and pest control efficacy of pesticide spray solution. Spray droplet sizes of pesticide solution decreased by addition of adjuvants even though its effect varied according to the pesticides. The adhesive effect of pesticides sprayed on target crops by addition of adjuvants varied according to the properties, the application methods, and the spray volume of pesticides. Wash-off of the deposited amount of active ingredients of the solution of tricyclazole WP and fenobucarb EC by simulated rainfall after spraying on rice plants dramatically reduced by adding adjuvants. The retained amount of active ingredients of the pesticides were 1.5~4.1 times higher than those without adjuvants when subjected to simulated rainfall 6 hours after spraying. Addition of adjuvants to the propanil EC spray solution enhanced the control efficacy in barnyard grass, Echinocloa crus-galli Beauv. by 8~30%, which showed a potential to reduce pesticide use.

살균제 hexaconazole의 잉어(Cyprinus carpio L.) 장기 중 분포

이은영(Eun Young Lee),박인영(In Young Park),김병석(Byung Seok Kim),박연기(Yeon Ki Park),유오종(Oh Jong You),박경훈(Kyung Hun Park),김균(Kyun Kim),경기성(Kee-Sung Kyung) 한국농약과학회 2007 농약과학회지 Vol.11 No.4

In order to elucidate the behavior of the fungicide hexaconazole (1-(6-chloro-3-pyridylmethyl)-N-nitroimidazolidin-2-ylideneamine) in carp (Cyprinus carpio L.), carps were exposed to [¹⁴C]hexaconazole at a predicted environmental concentration (PEC) of 0.32 mg L?¹ for 4 days under static conditions. Hexaconazole in water was absorbed into carps to reach the maximum concentration 2 days after exposure. The amounts of the [¹⁴C]hexaconazole and its metabolites absorbed in gall were much higher than those in the other organs and especially those in gall 2 days after exposure were 25 and 67 times higher than those in liver and kidney, respectively, strongly suggesting that biliary excretion involving enterohepatic recirculation could be an import route for the elimination of hexaconazole absorbed in carps.

살충제 Dinotefuran의 무에 대한 흡수이행 및 잔류 양상

곽세연(Se-Yeon Kwak),황정인(Jeong-In Hwang),이상협(Sang-Hyeob Lee),강민수(Min-Su Kang),류준상(Jun-Sang Ryu),강자군(Ja-Gun Kang),홍성현(Sung-Hyeon Hong),유오종(Oh-Jong You),김장억(Jang-Eok Kim) 한국농약과학회 2017 농약과학회지 Vol.21 No.3

The residual amounts of dinotefuran (DIN) applied to cultivated soil and radish leaf were investigated to assess uptake and residual patterns of DIN through the root and leaf. Recoveries for residual analysis of pesticides spiked with two different concentration on the radish root, leaf and soils were 85.5-104.9%. The degradation half-life of DIN in soils treated with 2.01 and 9.35 mg/kg of initial residues were 6.2-8.9 days and showed rapid degradation patterns. When analyzed radish harvested every 10 days from 40 to 70 days which were cultivated in DIN treated soil, the uptake rates from soil to whole radish by root were 4.9 to 16.7%. Root uptake amounts of DIN were 0.020-0.057 mg/kg for low (2.01 mg/kg) treatment and 0.066-0.256 mg/kg for high (9.35 mg/kg) treatment, respectively. Absorbed DIN were more distributed in the leaf than root at the early stage of harvesting, but the distribution of DIN in root tended to increase as time passage. On the other hand, as a result of foliar spraying with the standard amount, 2 times and 5 times according to the safe use standard of DIN, the initial residual amounts of DIN in leaf were 0.397, 0.788 and 1.172 mg/kg for each treatment level. And leaf uptake rates from leaf to root during experimental period were 1.7 to 7.1%. These results will be useful for determining management criteria for soil persisted pesticides.

농약등록기준 준수 현황과 수도 및 엽채소류 사용량 조사

김경선(Kyung-sun Kim),김광호(Kang-ho Kim),김남숙(Nam-suk Kim),임양빈(Yang-bin Ihm),이희동(Hee-dong Lee),김효경(Hyu-Gyung Kim),유오종(Oh-jong You),오병렬(Byung-youl Oh),임건재(Geon-jae Im),류갑희(Gab-hee Ryu) 한국농약과학회 2006 농약과학회지 Vol.10 No.3

A nation-wide monitoring survey was performed to look into pesticide use pattern and amount on farmers' field after the national registration of pesticides from 2003 to 2004. Tow hundred ninety two leading farmers involved in the survey were chosen from main cultivating regions of targeted crops in consideration with area. Most farmers involved in the survey follow the safe use guideline of pesticides, while their information to select and making-decision for purc㏊sing pesticides were done according to the recommendation of mainly pesticide market dealers or agricultural cooperative dealers. Used amount of pesticide per unit cropping area was surveyed as 5.51 on paddy, 3.91 on field cabbage, 2.93 on greenhouse cabbage, 0.76 on lettuce, 0.55 on spinach, 1.34 on perilla leaf, 4.89 on leek and 0.42 kg ㏊?¹ on young radish. As compound with those surveyed from 1999 to 2000, the pesticide amounts used for rice, lettuce and perilla leaf were reduced while t㏊t for cabbage was increased.