Bipolaris multiformis  (Jooste) Alcorn Pathogenic on Leaves of  Cucumis sativus  in Italy | Zendy

Vannacci G. | Zendy

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Bipolaris multiformis (Jooste) Alcorn Pathogenic on Leaves of Cucumis sativus in Italy

Author(s) -

Vannacci G.

Publication year - 1995

Publication title -

journal of phytopathology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.53

H-Index - 60

eISSN - 1439-0434

pISSN - 0931-1785

DOI - 10.1111/j.1439-0434.1995.tb00600.x

Subject(s) - cucumis , biology , citrullus lanatus , lagenaria , cucurbita pepo , cucurbitaceae , raphanus , conidium , spots , horticulture , botany , cultivar , bipolaris , inoculation

A destructive disease was observed in August 1981 in a field of Cucumis sativus cv. Radar. Sincc then sporadic spots on leaves of the same cultivar were recorded in 1985, 1988 and 1993. The causal agent was identified in Bipolaris multiformis (Jooste) Alcorn. The fungus produces frequently irregular (mostly Y‐shaped) conidia in culture but rarely on leaves. The pathogen germinates bipolarly in distilled water at 20–25°C (95 and 90% respectively), and on leaves it produces appressoria;, entry points are either stomata or the intact surface. Pathogenicity tests carried out on various cucurbitaceous plants showed symptom intensity decreasing with the following order: C. sativus cv. Radar and Eeballium elaterium > Brionia cretica subsp. dioica > Cueurbita pepo L. var. pommiformis and C. pepo var. patissonina f. radiata > C. moscata and Sechium edule. The other two tested cultivars of Cucumis sativus (Mezzolungo Marketer and Corto per sottaceti) and C. pepo cv. Verde scuro di Milano showed sterile, very small necrotic dot. Control plants, Citrullus lanatus cv. Sugar baby, Cucumbis melo and Lagenaria siceraria showed no symptoms.

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