Fitopatologia Brasileira (2005) 30, 195-198

Ailton Reis, Leonardo S. Boiteux, Milton L. Paz-Lima, Patrícia P. Silva and Carlos A. Lopes (2005)
New hosts of Oidiopsis haplophylli in the solanaceae family in Brazil
Fitopatologia Brasileira 30 (2), 195-198
Abstract: A powdery mildew disease was observed on leaves of Solanum gilo, S. melongena, S. tuberosum S. chacoense, Nicotiana rustica and N. tabacum in Brasília (Federal District), Brazil. Symptoms were mainly characterized by adaxial yellow areas in the leaves corresponding to white fungal colonies on the abaxial surface. Profuse sporulation was often observed. Light microscopy of the fungal colonies revealed the presence of conidiophores emerging through stomata with some having two or three branches. Ellipsoidal, subhyaline conidia were predominantly born singly and terminally on the conidiophore. All morphometrical characteristics agreed with those of Oidiopsis haplophylli (Syn. O. sicula). The teleomorph (Leveillula taurica) was not observed. Inoculation tests indicated that O. haplophylli isolates obtained from S. gilo, S. melongena, S. tuberosum, S. chacoense, Nicotiana rustica and N. tabacum were also pathogenic to sweet pepper (Capsicum annuum) and tomato (Lycopersicon esculentum). This is apparently the first report of these Solanaceae species as hosts of O. haplophylli in Brazil. This disease may become important in these crops, especially in greenhouses, and in hot and dry areas where drip irrigation is employed.
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Database assignments for author(s): Leonardo Silva Boiteux, Carlos A. Lopes

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Leveillula rutae	Eggplant (Solanum melongena)	Brazil (south)
	Leveillula rutae	Potato (Solanum tuberosum)	Brazil (south)
	Leveillula rutae	Tobacco (Nicotiana tabacum)	Brazil (south)
	Leveillula rutae	Solanum (crop)	Brazil (south)