The tomato powdery mildew fungus Oidium neolycopersici
2001; Wiley; Volume: 2; Issue: 6 Linguagem: Inglês
10.1046/j.1464-6722.2001.00084.x
ISSN1464-6722
AutoresHannah Jones, John M. Whipps, Sarah J. Gurr,
Tópico(s)Plant Pathogens and Resistance
Resumosummary 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.
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