Fungal, bacterial and nematological problems of citrus, grape and stone fruits in the Arab countries
1989
Ibrahim, G. | Bayaa, B.
Production status of citrus and grape vine in the Arab countries was briefly described. The distribution and the relative economic importance of the reported fungal, bacterial and nematological diseases of those fruit trees and that of stone fruits was discussed. Citrus canker, reported from four Arab countries is potentially one of the most serious diseases. Citrus stubborn in contrast to greening, is of a wider distribution. Phytophthora group of diseases are certainly the most widely distributed and presently seem to be the most destructive. Mal secco, through geographically restricted has the significance of being reported in countries of high status of production. The most important diseases on grape vine are powdery - and downy - mildews as well as black rot. In general, the relative importance of the diseases on stone fruits varies in Arab countries, but brown fruit rot and twig canker as well as leaf curl seem to be the most serious. The slow decline nematode disease is the most widely distributed. Facilities and methods of producing healthy seedlings are inadequate in most Arab countries. Morocco is an exception particularly in the production of citrus propagating materials
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