• Proceedings of the Korean Environmental Sciences Society Conference
• /
• 1998.10a
• /
• pp.263-266
• /
• 1998

• The Science & Technology
• /
• v.35 no.4 s.395
• /
• pp.24-25
• /
• 2002

• Agrochemical news magazine
• /
• v.17 no.5 s.134
• /
• pp.20-25
• /
• 1996

• The Korean Journal of Pesticide Science
• /
• v.13 no.1
• /
• pp.21-27
• /
• 2009

A study was carried out to find out the methodology of biological treatment for wastes and wastewater caused by an organophosporus insecticide, fenitrothion, using fenitrothion-degrading microorganism. A fenitrothion-degrading microorganism was isolated by using a selective nutrient broth (NB) medium including fenitrothion, and identified to Bacillus sphaericus NFol based on its morphological and biochemical characteristics. Further, investigation was processed to determine the optimal culture conditions degrading fenitrothion in NB medium by using the NFo1 strain. As results, the cultural conditions determined for temperature, initial pH and inoculum for the optimum growth of the strain and degradation of fenitrothion, which has a exact co-relationship between both of them, were $35^{\circ}C$, 7.5 and 1.5 at $OD_{660}$ value, respectively. In this conditions, fenitrothion could be degraded within 5 days over 90% at the high concentrations of fenitrothion, upto 200 mg/L.

• Research in Plant Disease
• /
• v.15 no.1
• /
• pp.17-22
• /
• 2009

To reduce the amount of chemical fungicides and the number of spray for the control of Alternaria blight of ginseng, biofungicides were used in order to reduce the residue and ensure the safety of ginseng plants. The control efficiencies were 68.34%$\sim$73.56% against Alternaria blight in 2 times alternate spray of biofungicides and chemical fungicide at 14 days interval whereas the control efficiencies were 87.00%$\sim$89.42% in 2 times alternate spray of 3 different kinds of chemical fungicides at 14 days interval. In case of treatment combination the control efficiencies were 74.53%$\sim$87.23% in alternate spray of mixture of biofungicides and chemical fungicides at 28 days interval in all combinations except 2 kinds of combinations (Com-12 and Com-17). Therefore, the alternate application of the biofungicides and chemical fungicides or alternate application of mixture of biofungicides and chemical fungicides could reduce the amount of chemical fungicide about 75.00%$\sim$83.33%.

• Korean journal of applied entomology
• /
• v.52 no.1
• /
• pp.35-43
• /
• 2013

All tested Korean populations of the diamondback moth, Plutella xylostella, are known to be resistant especially against pyrethroid insecticides by mutation in its molecular target, para-sodium channel. Moreover, P. xylostella is able to develop resistance against most commercial insecticides. This study was performed to develop an efficient control technique against P. xylostella by a combined treatment of an endoparasitoid wasp, Cotesia plutellae, and a microbial insecticide, Bacillus thuringiensis. To investigate any parasitism preference of C. plutellae against susceptible and resistant P. xylostella, five different populations of P. xylostella were compared in insecticide susceptibilities and parasitism by C. plutellae. These five P. xylostella populations showed a significant variation against three commercial insecticides including pyrethroid, organophosphate, neonicotinoid, and insect growth regulator. However, there were no significant differences among five P. xylostella populations in their parasitic rates by C. plutellae. Moreover, parasitized larvae of P. xylostella showed significantly higher susceptibility to B. thuringiensis. As an immunosuppressive agent, viral ankyrin genes (vankyrins) encoded in C. plutellae were transiently expressed in nonparasitized larvae. Expression of vankyrins significantly enhanced the efficacy of B. thuringiensis against the third instar larvae of P. xylostella. Thus an immunosuppression induced by C. plutellae enhanced the insecticidal efficacy of B. thuringiensis. These results suggest that a combined treatment of C. plutellae and B. thuringiensis may effectively control the insecticide-resistant populations of P. xylostella.

• Agrochemical news magazine
• /
• v.17 no.5 s.134
• /
• pp.68-75
• /
• 1996

''소비자는 통상 매스컴에서 많이 다루고 있는 식품중 잔류농약, 항생물질이나 방사선 조사식품에서 대한 우려를 많이 하고 있다. 그러나 식품과학적 측면에서 이와같은 오염물질에 의한 위해발생 가능성은 별로 높지않다. 오히려 우리가 별 문제가 없다고 생가가하고 있는 식품중 미생물의 증식이나 영양적 불균형이 더 큰 위해발생 요인이다.'' ''발생가능한 모든 위해를 완전히 차단하는 것은 현실적으로 불가능할 분만 아니라 국민건강상 더 큰 위해를 초래할 수 있다. 그러나 대부분의 국민들은 단순히 적은 가능성일 뿐인 위해발생에 더 관심이 많고, 그 실익에 대해서는 모르거나 현실상황을 외면하는 경우가 많아 식품위생행정에 대한 불신이 증폭되고 있다. '' 최근 산국식품연구원의 송인상 박사는 한국농촌의학회지를 통해 발표한 $\ulcorner$식품의 안전성 확보를 위한 과제들$\lrcorner$이란 주제에서 이같이 지적하고 식품위생에 대한 보다 정확하고 과학적인 지식을 소비자에게 제공하는 교육과 홍보의 기능이 매우 중요하다고 주장했다. 주요내용을 발췌 소개한다.

• Research in Plant Disease
• /
• v.14 no.1
• /
• pp.43-50
• /
• 2008

Rhizoctonia blight (large patch) caused by Rhizoctonia solani AG2-2 is one of the major diseases on zoysiagrass in golf courses. In this study, anatgonistic bacteria to R. solani AG2-2 were selected in vitro tests using confrontation bioassay and triple layer agar diffusion method. The most active bacteria, Bacillus subtilis CJ-9 were tested for controlling large patch in pots. Relative Performance Indies (RPI) was used as a criterion for the selection of potential biocontrol agent. B. subtilis CJ-9 showed resistance to major synthetic agrochemicals used in golf course. In field tests at golf course, B. subtilis CJ-9 was more effective in suppression of large patch severity and population development of R. solani AG2-2 in soil than chemical fungicides. B. subtilis CJ-9 could be an alternative to chemical fungicides for eco-friendly management of large patch on zoysiagrass.

• Microbiology and Biotechnology Letters
• /
• v.5 no.4
• /
• pp.159-165
• /
• 1977

20 pesticides induding 11 insecticides, 5 herbicides and 4 fungicides have been tested for mutagenic activity in the Salmonella microsome system. It was found that Captan showed strong mutagenic activity directly in TA 1535, TA 100 and TA 98 strains, indicating that it induces both base substitution and frame shift mutation. With microsomal activation system, mutagenicity of Captan was slightly decreased. Micut, Dimethoate and Triforine revealed slight mutagenicity in TA100 without microsmal enzyme activtion.

• 한국약용작물학회:학술대회논문집
• /
• 2010.10a
• /
• pp.125-126
• /
• 2010