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Control of Gray Mould(Botrytis cinerea) on Roses by Pre-and Post-harvest Treatments with Agricultural Chemicals

채화 전.후 약제처리에 의한 절화장미 잿빛곰팡이병 발병억제

  • Lee, Jung-Sup (Horticultural Environment Division, National Horticultural Research Institute, RDA) ;
  • Han, Kyoung-Suk (Horticultural Environment Division, National Horticultural Research Institute, RDA) ;
  • Park, Jong-Han (Horticultural Environment Division, National Horticultural Research Institute, RDA) ;
  • Cheong, Seung-Ryong (Horticultural Environment Division, National Horticultural Research Institute, RDA) ;
  • Jang, Han-Ik (Fruit Research Division, National Horticultural Research Institute, RDA)
  • Published : 2006.12.01

Abstract

Several fungicides such as polyoxine B, fludioxonil, tebuconazole, tebuconazole+dichlofluanid, and fenbuconazole were sprayed once a week on roses in greenhouse. Botrytis infection on stalks was reduced by 71-89% after regular fungicide spray. The reduction of conidial inoculum by these treatments is also observed. The rose petal infections were controlled significantly by these fungicides only 2 days after the application. The development of gray mold on rose flowers harvested just after spray of fludioxonil, tebuconazole and tebuconazole+dichlofluanid were reduced compared to untreated control. This beneficial effect was also shown in flowers artificially inoculated with B. cinerea conidia after harvest. Post-harvest treatments by spraying cut flowers with the fungicides such as iprodine plus thiram, tebuconazole+dichlofluanid and polyoxin D reduced disease incidence by 50-55%.

온실내에서 생장하고 있는 장미의 잿빛곰팡이병 방제를 위하여 polyoxin B, fludioxonil, tebuconazole과 tebuconazole+dichlofluanid 그리고 fenbuconazole를 $7{\sim}8$일 간격으로 경엽 살포한 결과 줄기에서의 Botritis에 의한 감염은 $71{\sim}89%$ 발병이 억제되었다. 장미의 꽃잎내 발병정도는 일부 약제에서 처리 직후부터 2일까지 현저하게 발병억제 효과가 높은 것이 확인되었다. 또한, 처리 약제중 fludioxonil, tebuconazole, dichlofluanid 단용 또는 다른 약제와의 혼용 처리는 처리직후 채화한 장미 꽃에서 잿빛곰팡이병의 발병 억제 효과가 현저히 높았다. 이러한 결과는 채화 후 B. cinerea의 분생포자를 접종 처리한 꽃잎과 잠재적으로 자연 감염된 꽃에서 확인이 가능하였다. 장미 채화 후 iprodine+TMTD, tebuconazole+dichlofluanid 그리고 polyoxin D를 꽃잎에 살포한 결과 잿빛곰팡이병의 발병을 현저하게 억제(50-55%)하였다. 따라서, 장미 온실내에서 채화 전 약제 살포에만 의존하여 방제하는 것은 채화 후 발병 가능성이 높기 때문에 채화 후 약제 살포의 중요성이 확인되었다.

Keywords

References

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