Folia Horticulturae

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The seed mycoflora of the runner bean (Phaseolus coccineus L.)

Danuta Pięta*, Helena Łabuda**

**Department of Phytopathology and Technology of Plant Protection
**Faculty of Horticulture, Agricultural University
**Akademicka 15, 20-934 Lublin, Poland
**Department of Vegetable Crops
**Faculty of Horticulture, Agricultural University
**Leszczyńskiego 58, 20-068 Lublin, Poland

In the years 1986-1988, 18 samples of seeds from populations of Phaseolus coccineus L. coming from the Kraśnik, Kasiłan, and Tyszowce regions were investigated. Every sample from the analysed populations included seeds with brown spots on the cover surface, the percentage ranging from 5.0 to 28.4. As a result of mycological analysis of the spotted seeds, 2220 isolated were obtained. Alternaria alternata proved to be the most frequently isolated species, its culture forming 33.5% of all fungi found. However, Botrytis cinerea, Rhizoctonia solani, Sclerotinia sclerotiorum, and Fusarium spp. were also often isolated. Studies on the germination of seeds from populations from Kraśnik, Kasiłan, and Tyszowce demonstrated certain significant differences between the number of seedlings developed from seeds of normal colour and those grown from mottled ones. Moreover, the seedlings developed from spotted seeds showed growth inhibition while on the epicotyl and hypocotyl wet rot appeared, usually being caused by Rhizoctonia solani.

Pięta D., Łabuda H., 1990. The seed mycoflora of the runner bean (Phaseolus coccineus L.). Folia Horticulturae II/2: 63-75.