บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Effect of wet incubation time and temperature on infection, and of storage time and temperature on soft rot lesion expansion in potatoes inoculated with Erwinia carotovora ssp. carotovora.

Kushalappa, A. C. and Zulfiqar, M.

Potato Research. Volume 44, Number 3, 2001. Pages 233-242.

2001

บทคัดย่อ

Effect of wet incubation time and temperature on infection, and of storage time and temperature on soft rot lesion expansion in potatoes inoculated with Erwinia carotovora ssp. carotovora.

Infection and lesion expansion studies were carried out on potato cv. Russet Burbank tubers. In the infection study, the tubers were inoculated with E. carotovora subsp. carotovora (Ecc) and exposed to incubation temperatures of 10-25 deg C for 3-48 h of wetness. In the lesion expansion study, the tubers were exposed to 12 h of wetness at 20 deg C to establish infection, and then stored at temperatures of 4-16 deg C for 15-90 days, at 95% RH. The volume of diseased tissue was determined and the data were transformed to proportion of maximum volume diseased (PVD). Infection was close to zero for 3 and 6 h wet incubation time, regardless of incubation temperature, and reached the maximum in 12 h of wetness at 20 deg C. Significant lesion expansion occurred at a storage temperature of 16 deg C after about 60 days of storage time. Cubic models of infection and lesion expansion potentials explained 95 and 96% of the variations in infection and lesion expansion, respectively.