미생물제(Rhodococcus sp. 3-2) 처리에 따른 토양 중 카벤다짐의 분해효과
Degradation effect of carbendazim in soil by application with the microbial agent, Rhodococcus sp. 3-2
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BACKGROUND: The fungicide of benomyl, a benzimi-dazole group, has been commonly used for pesticides against fungal diseases in the world. However, benomyl is rapidly hydrolyzed in the environment after using to control plant diseases and has adverse effects by generating car-bendazim, which is toxic to plants, humans, and the en-vironment. METHODS AND RESULTS: In this study, the decompo-sition effect of carbendazim, a degradation product of be-nomyl was conducted in pot and field after making a pro-totype of benomyl-degrading microbial agent (BDMA). We found that the carbendazim-degrading microbial agent (CDMA) (105, 106, and 107 cfu/g soil) decomposed carbendazim by 50% or more in all the treatments, com-pared to the untreated control in the pot tests after four weeks. The effect of 100% decomposition of carbendazim was observed at 7 days after treatment, when the proto-type of BDMA was apllied at 10-folds dilution in the field. The decomposition effect at more than 60% and plant growth promoting effect were observed after 7 days of the treatment, compared with the untreated group in the sec-ond field experiment,treated with commercially available concentrations of 500-folds and 1,000-folds. CONCLUSION(S): These results might represent that the BDMA would decompose carbendazim effectively, a de-composition product of the fungicide benomyl, remaining in agricultural area, and it could be utilized practically by using a low dilution rate.
Abstract
BACKGROUND: The fungicide of benomyl, a benzimi-dazole group, has been commonly used for pesticides against fungal diseases in the world. However, benomyl is rapidly hydrolyzed in the environment after using to control plant diseases and has adverse effects by generating car-bendazim, which is toxic to plants, humans, and the en-vironment. METHODS AND RESULTS: In this study, the decompo-sition effect of carbendazim, a degradation product of be-nomyl was conducted in pot and field after making a pro-totype of benomyl-degrading microbial agent (BDMA). We found that the carbendazim-degrading microbial agent (CDMA) (105, 106, and 107 cfu/g soil) decomposed carbendazim by 50% or more in all the treatments, com-pared to the untreated control in the pot tests after four weeks. The effect of 100% decomposition of carbendazim was observed at 7 days after treatment, when the proto-type of BDMA was apllied at 10-folds dilution in the field. The decomposition effect at more than 60% and plant growth promoting effect were observed after 7 days of the treatment, compared with the untreated group in the sec-ond field experiment,treated with commercially available concentrations of 500-folds and 1,000-folds. CONCLUSION(S): These results might represent that the BDMA would decompose carbendazim effectively, a de-composition product of the fungicide benomyl, remaining in agricultural area, and it could be utilized practically by using a low dilution rate.
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