• The Korean Journal of Pesticide Science
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• v.9 no.1
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• pp.88-96
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• 2005

Paraquat-resistant biotype of Conyza canadensis (L.) Cronq. was determined by chlorophyll loss and random amplified polymorphic DNA (RAPD) analysis and the resistant mechanism was investigated with respect to absorption, translocation, and binding constant. RAPD analysis for paraquat resistant (R) and susceptible (S) biotypes found in a pear orchard revealed that the biotypes possessed remote genetic relationship. Chlorophyll loss, as an indication of paraquat toxicity, of S biotype was 7.8-fold greater than that of R biotype. There were no differences in contents of epicuticular wax and cuticle and amounts of [14C]paraquat penetrating the cuticle between the two biotypes. Little translocation of the herbicide out of the treated leaf was observed in either biotype. Binding constants of paraquat to the cell wall and thylakoid membrane were 7.4-fold and 16.9-fold, respectively, higher in R biotype than in S biotype. The results suggest that the resistance mechanism of C. canadensis biotype is due partly to high binding affinity of paraquat to the cell wall and thylakoid membrane.

• Agrochemical news magazine
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• v.21 no.2 s.155
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• pp.46-49
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• 2000

살균제를 지속적으로 사용하는데 있어 저항성관리는 매우 중요하다. 저항성 관리가 없으면 농민과 재배자에 이용가능한 살균 성분수와 효과가 심각하게 감소될 수 있으며 제품은 제조회사들이 작물보호분야에서 요구되는 기술발전에 필수적인 연구개발 계획을 유지하기에 충분한 이윤을 내기전에 쓸모없이 될 수도 있다. 그러나 저항성 관리는 그 역사가 20년도 안되는 비교적 새로운 과학이어서 아직도 많은 연구가 필요한 분야이다.

• Research in Plant Disease
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• v.18 no.1
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• pp.35-39
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• 2012

Occurrence of tomato late blight (Phytophthora infestans) has caused significant losses in tomato yield in all over the world. Evaluation of the level of resistance in tomato gene resources for main breeding and initiation of the resistance breeding program are important for control of this disease. Resistant assay of 78 tomato cultivars/lines to late blight in pots and field experiment was carried out under controlled and natural conditions in 2009. All commercial cultivars including 'Legend' were susceptible. However, 10 lines including KNU-2, KNU-6-1, KNU-11, KNU-13, KNU-14-1 lines distributed from University of California, Riverside and L3708, $AV107-4{\times}L3708$, $07-15{\times}L3708$, $BS67{\times}L3708$ lines which have resistant gene Ph-3 and $06-9-62A{\times}06-9-62A$ were highly resistant to late blight. These highly resistant lines can be used as resources of resistance to late blight in a tomato breeding program in future.

• Journal of Sericultural and Entomological Science
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• v.28 no.2
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• pp.48-51
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• 1986

Resistance to the flacherie virus(FV) and the densonucleosis virus(DNV) of 10 Japanese lines and 10 Chinese lines used for hybrids was tested and the results obtained are as follows ; 1. Hansang #1 showed the highest resistance to the FV among the tested Japanese lines whereas Mudeung was of lowest resistance. In Chinese lines tested on the resistance to the FV, Jam118 was the highest while Jam 116 was the lowest. 2. In Japanese lines tested on the resistance to the DNV, it was shown that Jam 117, Gyeongchy, Mudeung, Hansaeng #1 and Hansaeng #3 were of the complete resistance but Jam 115 showed the lowest resistance. On the other hand, all the Chinese lines tested showed the complete resistance to the DNV.

• Korean journal of applied entomology
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• v.30 no.4
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• pp.291-293
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• 1991

Inter-regional difference in median lethal concentration of Bacillus thuringiensis diamondback moth was disclosed to be high. Pyungchang strain showed at most 41 times resistance compared to KN-IA strain of which $LC_{50}$ value was 5.5 ppm. and Oksan strain Showed 11 times resistance. The JMC strain, susceptible to pyrethroids, also showed 12 times resistance against B.T., suggesting difference in resistance mechanism between pyrethroid and B.t.

• Proceedings of the Korean Nuclear Society Conference
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• 1996.05c
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• pp.117-122
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• 1996

본 연구에서는 2개사에서 제조된 합금 600 및 합금 690 이음매 없는 관과 진공 유도 용해로 제조한 합금 690 판재에 대하여 부시 환경의 변화에 따른 특성 평가를 행하였다. 부식 평가는 양극 분극 시험을 통하여 행하였으며 부식 환경은 NaCl, HCl, NaOH(＋$Na_2$SO$_4$) 용액 및 Cu$^{＋}$/Cl$^{－}$ SO$_4$$^{2－}$ 용액이었다. 합금 600 및 합금 690의 양극 분극 저항성을 부식 환경에 따라 평가한 결과, 부식 용액의 종류에 따라 서로 다른 분극 거동을 보이고 있으며, 합금 690의 저항성이 합금 600의 저항성보다 우수하게 나타났다. 또한 가성 용액 중에 $Na_2$SO$_4$를 첨가할 경우 부식 속도를 가속화시키고 있다. 한편 Mo이 첨가되지 않은 합금 690M0의 경우는 Cl$^{－}$ SO$_4$$^{2－}$ 비가 증가할수록 공식 저항성이 급격히 감소하고 있으나, Mo이 첨가된 합금 690M2의 경우는 시험한 전체 비율에서 이온의 영향을 받지 않는 것으로 나타나고 있어 합금 690의 공식 저항성에 Mo이 매우 좋은 효과를 보이고 있음을 알 수 있다.

• Life and Agrochemicals
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• s.263
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• pp.22-25
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• 2010

농약회사, 대학 및 연구소, 농업기관 농업인으로 HRAC조직을 구성하여, 저항성잡초의 발생원인 규명, 저항성잡초에 대한 대책방안 제시, 저항성잡초관리요령의 대농민 홍보 및 교육, 조기진단 시스템구축, 최적의 농약살포 방법 모색 및 시행 등으로 구성원간의 상호 연계하여 필요시에는 역할을 분담하여 효율적으로 운영할 필요가 있다.

• Life and Agrochemicals
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• s.262
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• pp.18-21
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• 2010

저항성 잡초의 발생 및 조기 확산을 방지하기 위한 재배방법이나 제초제 사용요령 등의 지속적으로 교육 홍보가 필요하며, 모니터링과 저항성 발현기작 연구 등을 통해 올바른 진단이 이루어질 수 있도록 정부는 조속히 대책을 수립해야 한다.

• Korean Journal Plant Pathology
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• v.11 no.2
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• pp.146-150
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• 1995

1994년, 1995년에 주요 채소 작물에서 분리한 잿빛곰팡이병균(Botrytis cinerea)의 방제 살균제에 대한 저항성을 조사한 결과, 1994년 분리된 713균주 중 610균주(85.6%)가 benzimidazole계에 저항성(Ben\ulcorner)이었고, 249균주(34.9%)는 dicarboximide계 살균제에 저항성(Pro\ulcorner)이었으며, benzimidazole계 및 N-phenyl carbamate계 두약제 모두에 저항성인 균주는 분리되지 않았다. 1995년에는 현재까지 520균주를 분리하였는데, 그중 Ben\ulcorner이 317균주(61%)이며 Pro\ulcorner은 214균주(41.2%)이었고, Ben\ulcorner이며 NPC\ulcorner인 균주(Ben\ulcorner+NPC\ulcorner)는 15균주(2.9%)로 나타났다. 이러한 저항성 균주의 최소 억제 농도는 carbendazim 1,000 $\mu\textrm{g}$/ml 이상, diethofencarb 1,000 $\mu\textrm{g}$/ml 이상이었다. 또 Ben\ulcorner+NPC\ulcorner인 15균주 중 3균주는 dicarboximide계 살균제인 procymidone에도 저항성이었으며, 한 균주를 제외한 모든 Pro\ulcorner 균주는 Ben\ulcorner로 나타났다.

• Korean Journal of Environmental Agriculture
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• v.14 no.3
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• pp.319-328
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• 1995

This study was carried out to investigate the resistance mechanism by three different kinds of procymidone-resistant and susceptible isolates of Botrytis cinerea which had been collected from green houses. The average resistance level of the resistant strains was 1,000 times higher than that of susceptible ones. Also, it was revealed that the resistance was not originated from components excreted by Botrytis cinerea, based on the result obtained from the treatment with piperonyl butoxide and triphenyl phosphate as an inhibitor of monooxygenase and esterase, respectively. The total lipod content of resistant strains was 1.3 times higher than that of susceptible ones, among fatty acids, palmitic acid, stearic acid, and linoleic and being 3.0, 2.5, and 2.0 times higher, respectinely. Also slight differences in sterol contents and components were observed. The crude chitin content was slightly higher in susceptible strains but contents of N-acetyl glucosamine, a hydrolysate of chitin, were about 2 times higher in resistant ones.