ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Effect of conidial concentration of Monilinia fructicola on brown rot development in detached cherries.

Northover, J.; Biggs, A. R.;

Canadian Journal of Plant Pathology Year: 1995 Vol: 17 Issue: 3 Pages: 205-214 Ref: 20 ref.

1995

บทคัดย่อ

Mature sweet and sour (tart) cherries, free of fungicide residues, were harvested, arranged in trays and inoculated without wounding with single 33 micro l drops containing 1x103 to 1x106 conidia/ml of M. fructicola. After 22 h wetting at 20 deg C, fruits were dried (2-4 h), incubated at 20 deg C, and evaluated daily for development of lesions and sporodochia for 8-9 d post-inoculation. For sweet cherry fruits, increasing the inoculum concn advanced initial lesion appearance from 5 to 2 d post-inoculation, increased the incidences of fruits with lesions from 23 to 99% (9 d) and increased the proportion of fruits with sporodochia from 21 to 99% (9 d). The response pattern of ripe sour cherry fruits was very similar, with initial lesion appearance advanced from 4 to 2 d, and the incidences of fruits with lesions and sporodochia increased from 9 to 92%, and from 9 to 91%, resp., after 8 d postinoculation incubation. Fruits of Vista sweet cherry were 5 times more susceptible to infection than those

of Montmorency sour cherry. Longer wetting durations of 36 and 48 h, increased lesion and sporodochial development of Bing sweet cherry fruits, especially from low inoculum concn. Similar numbers of conidia applied in 3-10 micro l drops induced a slightly higher incidence of lesions than when applied in 30 micro l drops. The responses of the proportions of fruits with lesions or sporodochia to inoculum concn and post-inoculation incubation time, or inoculation wetting duration, were described by polynominal models.