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- CHARACTERIZATION OF MOROCCO ISOLATES OF PHYTOPHTHORA INFESTNS FOR MATING, TYPE GENOTYPE AND METALAXYL SENSITIVITY
CHARACTERIZATION OF MOROCCO ISOLATES OF PHYTOPHTHORA INFESTNS FOR MATING, TYPE GENOTYPE AND METALAXYL SENSITIVITY
Auteur :
Sedegui
M. ,
Carroll
R.B. ,
Morehart
A.
... [et al]
Type : Article
Thème : Agriculture
Couverture :
Maroc
URL Article :
http://ressources.ciheam.org/om/pdf/c31/CI020871.pdfURL Source :
http://ressources.ciheam.org 
Télécharger le document :
(362,30 kB) CI020871.pdfRésumé/Sommaire :
In Morocco Tomatoes (Lycopersìc~mes culentum Mill) and potatoes (Solunum tuberosum) has become an important segment of the domestic food supplies and provide significant export income (O.C.E.). These crops are grown year-around in northern and southern Morocco along the Atlantic coast and inland in the Atlas Mountain region. In spite of ubiquity of susceptible hosts, late blight, caused by Phytophthoru infestam (Mont) de Bary, has not been an important disease until recent years (Plant Protection Service, 1996). On the continent of Mica, it was first reported in 1941, on Irish potatoes being grown for allied troops in South Afiica (Coxet a1.,1960). Late blight has been observed for decades as small-delimited foci in Moroccan potato and tomato fields but has not limited the production. High daytime temperatures were though to inhibit epiphytotic developmebnyt the pathogen.I n the past several years, dueto population shrifts ofP . infesturn, late blight has become epidemic regardless of the control measures imposed. Significant losses have occurred in potatoes planted in the spring. This study was undertaken to characterize the parasitic fitness of Moroccan isolates of P. infestuns on the most widely grown potatoa nd tomato cultivars.
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