บทคัดย่องานวิจัย

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Grass as a source of inoculum for rot caused by Coprinus psychromorbidus in stored apples.

Sholberg, P. L.; Gaudet, D. A.;

Canadian Journal of Plant Pathology Year: 1992 Vol: 14 Issue: 3 Pages: 221-226 Ref: 15 ref.

1992

บทคัดย่อ

Grass as a source of inoculum for rot caused by Coprinus psychromorbidus in stored apples.

Orchard litter was evaluated as a source of inoculum of C. psychromorbidus in postharvest rot of apples and pears stored at low temp. in British Columbia, Canada. When perforated plastic bags containing Spartan or Golden Delicious apples also contained Kentucky bluegrass (Poa pratensis) inoculated with strains of C. psychromorbidus, a high percentage of fruit developed postharvest rot symptoms after 6-7 months in commercial cold storage. The mean percentage of fruit exhibiting symptoms ranged from 24.4 to 98.4%, depending on the fungal strain. Orchard litter (dead roots, leaves and stems of grasses and clovers from the orchard floor) was added to healthy Spartan apples and incubated under commercial cold storage conditions. Postharvest rot occurred in 17.8 and 9.1% of the treated apples in 1988-89 and 1989-90, respectively, but in only 2.2% of the apples not treated with the litter. All fungi recovered from symptomatic tissue were psychrophilic and similar in morphology to C. psychromorbidus. Penicillium spp. were occasionally isolated but produced decay symptoms unlike those caused by C. psychromorbidus. It is concluded that orchard litter serves as a source of inoculum for postharvest rot of apples and pears.