Occurrence of Sclerotinia sclerotiorum (Lib.) de Bary on some perspective sunflower varieties and hybrids and some factors influencing the infection. Occurrence of Alternaria zinniae (Pape) on sunflower in 1981 in the Department Tolna [Helianthus annuus, Hungary]

agentes nocivos alternaria campanulatae champignon compositae crops cultivos dicotiledoneas dicotyledons diseases eastern europe economic plants enfermedades fungosas europa europa oriental europe europe orientale facteur nuisible fungi helianthus helianthus annuus hongrie hungary hungria industrial crops injurious factors moho moisissure monocarpos ornamentales moulds mycose mycoses oil crops ornamental monocarps ornamental plants plantas plantas industriales plantas oleaginosas plantas ornamentales plante plante de culture plante industrielle plante ornementale plante ornementale monocarpique plants sclerotinia symptome symptoms