Isolated pathogens from occurred FHB symptoms on wheat in Korea were identified by morphological characteristics and gene analysis. Colony produced mycelium of white and red pigment on potato dextrose agar (PDA) medium. Conidia was hyaline, straight or slightly curved and 3∼7 septate by Microscopic ...
Isolated pathogens from occurred FHB symptoms on wheat in Korea were identified by morphological characteristics and gene analysis. Colony produced mycelium of white and red pigment on potato dextrose agar (PDA) medium. Conidia was hyaline, straight or slightly curved and 3∼7 septate by Microscopic investigation. The result was identified Fusarium graminearum lineage 6(F. asisticum) by Analysis of DNA sequencing. To select effective chemicals to control Fusarium head blight (FHB) in wheat, we tested 14 chemicals by the inhibition of the fungal growth on medium and by control efficiency of disease in fields. Treatment of Fludioxonil FS (Flowable concentrate for seed treatment), Fludioxonil SC (suspension concentrate) and Benomyl+thiram WP (wettable powder) showed inhibition of fungal growth on PDA medium. In aspect of active ingredient properties, Cyanopyrole and Dithiocarbamate type showed the effectiveness on inhibition of fungal growth, while organic and inorganic copper complex and carbamate type was not effective. In field conditions, we examined the disease control value of four selected chemicals such as Fludioxonil SC, Captan WP, Difenoconazole+propiconazole EC (Emulsifiable concentrate) and Metconazole SC. These chemicals were sprayed twice onto "Yeonbackmil" at 30th April and 10th May in two regions, Gimje and Iksan, Jeonbuk. The disease incidence was 45% and 33.7% for the control plots in Gimje and Iksan, while the FHB disease incidence was between 0.3 and 4.3% in chemical treated plots and Iksan showed slightly higher than Gimje. The control value of the all selected chemicals was over 95% and 87∼90% against FHB of wheat grown at Gimje and at Iksan, respectively, indicating that all four chemicals were effective to control FHB. Resistance evaluation on wheat and barley to FHB were carride with 32 and 25 cultivars, respectively. In case of two-rowed barley, 169 germplasm were evaluated for the FHB resistance. There was no wheat cultivar showing high resistance against FHB but "Hanbaekmil" showed moderately high resistance against FHB with 29.2% of disease occurrence. No culticvars showed great resistance whereas "Shinhobori" exhibited moderately high resistance against FHB with 12.2% of disease incidence. Among 169 assessions of two-rowed barley, Salmas, Milyang107, Gerber and 94A.645-G-1M-2Y-1 were highly resistant to FHB. Most of other sources, however, were susceptible to agents causing FHB. Application of selected chemicals will be effective to control FHB. A few assession with high resistance to FHB were identified in two-rowed barley. These may help to develop cultivar with high resistance.
Isolated pathogens from occurred FHB symptoms on wheat in Korea were identified by morphological characteristics and gene analysis. Colony produced mycelium of white and red pigment on potato dextrose agar (PDA) medium. Conidia was hyaline, straight or slightly curved and 3∼7 septate by Microscopic investigation. The result was identified Fusarium graminearum lineage 6(F. asisticum) by Analysis of DNA sequencing. To select effective chemicals to control Fusarium head blight (FHB) in wheat, we tested 14 chemicals by the inhibition of the fungal growth on medium and by control efficiency of disease in fields. Treatment of Fludioxonil FS (Flowable concentrate for seed treatment), Fludioxonil SC (suspension concentrate) and Benomyl+thiram WP (wettable powder) showed inhibition of fungal growth on PDA medium. In aspect of active ingredient properties, Cyanopyrole and Dithiocarbamate type showed the effectiveness on inhibition of fungal growth, while organic and inorganic copper complex and carbamate type was not effective. In field conditions, we examined the disease control value of four selected chemicals such as Fludioxonil SC, Captan WP, Difenoconazole+propiconazole EC (Emulsifiable concentrate) and Metconazole SC. These chemicals were sprayed twice onto "Yeonbackmil" at 30th April and 10th May in two regions, Gimje and Iksan, Jeonbuk. The disease incidence was 45% and 33.7% for the control plots in Gimje and Iksan, while the FHB disease incidence was between 0.3 and 4.3% in chemical treated plots and Iksan showed slightly higher than Gimje. The control value of the all selected chemicals was over 95% and 87∼90% against FHB of wheat grown at Gimje and at Iksan, respectively, indicating that all four chemicals were effective to control FHB. Resistance evaluation on wheat and barley to FHB were carride with 32 and 25 cultivars, respectively. In case of two-rowed barley, 169 germplasm were evaluated for the FHB resistance. There was no wheat cultivar showing high resistance against FHB but "Hanbaekmil" showed moderately high resistance against FHB with 29.2% of disease occurrence. No culticvars showed great resistance whereas "Shinhobori" exhibited moderately high resistance against FHB with 12.2% of disease incidence. Among 169 assessions of two-rowed barley, Salmas, Milyang107, Gerber and 94A.645-G-1M-2Y-1 were highly resistant to FHB. Most of other sources, however, were susceptible to agents causing FHB. Application of selected chemicals will be effective to control FHB. A few assession with high resistance to FHB were identified in two-rowed barley. These may help to develop cultivar with high resistance.
주제어
#Wheat Barley Fusarium head blight Chemical control Resistace evaluation
학위논문 정보
저자
박정미
학위수여기관
전북대학교 일반대학원
학위구분
국내석사
학과
농생물학
지도교수
김형무
발행연도
2013
총페이지
ⅲ, 35 p.
키워드
Wheat Barley Fusarium head blight Chemical control Resistace evaluation
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