Open AccessThe tomato powdery mildew fungus Oidium neolycopersici
Author(s) -
Jones Hannah,
Whipps John M.,
Gurr Sarah Jane
Publication year - 2001
Publication title -
molecular plant pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.945
H-Index - 103
eISSN - 1364-3703
pISSN - 1464-6722
DOI - 10.1046/j.1464-6722.2001.00084.x
Subject(s) - powdery mildew , conidium , biology , appressorium , botany , fungus , mycelium , obligate , hypha
summary Pathogen: Powdery mildew fungus; Ascomycete although sexual stage is yet to be found; an obligate biotroph. Identification: Superficial mycelium with hyaline hyphae; unbranched erect conidiophores; conidia, ellipsoid‐ovoid or doliform, 22−46 × 10−20 µm, lack fibrosin bodies; conidia formed singly, rarely in short chains of 2–6 conidia; appressoria lobed to multilobed, rarely nipple‐shaped. Pseudoidium species. Host range: Broad, reported to attack over 60 species in 13 plant families, particularly members of the Solanaceae and Curcubitaceae. Symptoms: Powdery white lesions on all aerial plant parts except the fruit. In severe outbreaks the lesions coalesce and disease is debilitating. Agronomic importance: Extremely common in glasshouse tomatoes world wide but increasing in importance on field grown tomato crops. Control: Chemical control and breeding programmes for disease resistance.