Acta Phytopathologica et Entomoligica 34. (1999)

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Contents DISEASES Cabbage infected with phytoplasma from the aster yellows group in Hungary M. Fodor, О. Vtcziän, E. Mergenthaler and S. Sülé........................................................................... 1 High incidence of hop stunt viroid in Hungarian grapevines Erzsébet Farkas, L. Palkovics, J. Mikulás and E. Balázs.................................................................. 7 Identification, occurrence and host range of tomato powdery mildew (Oidium lycopersicum) in the Czech Republic A. Lebeda and B. Mieslemvá .............................................................................................................. 13 Alteration in the antifungal metabolite production of tebuconazole tolerant mutants of Trichoderma viride A. Kumar and J. P. Gupta.................................................................................................................... 27 Seed health testing of com for Cephalosporium maydis S. H. Michail, M. S. Abou-Elseoud and Mona S. Nour Eldin ......................................................... 35 Effect of late wilt disease of maize incited by Cephalosporium maydis on lipid and fatty acid contents of maize grains M. S. Abou-Elseoud, S. H. Michail and Mona S. Nour Eldin ......................................................... 43 Suppression of phenol and defense related enzymes in cowpea seed by seed-borne fungi C. Ushamalini, K. Rajappan and K. Manickam ............................................................................... 51 Effect of fungicides on the development of Cladosporium leaf spot of poplar in Western Himalaya R. C. Sharma and Sanjeev Sharma..................................................................................................... 57 Factors affecting conidial germination of Colletotrichum gloeosporioides isolated from Polystigma rubrum subsp. rubrum stromata S. Slojanovic, Mira Stamvié and D. Matijevié.................................................................................... 63 Leaf surface waxes in relation to resistance against spot blotch (Drechslern sorokiniana) of wheat Soma Das, Rashmi Aggarwal, Prem Dureja and D. V. Singh ......................................................... 75 Control of anthracnose disease of cowpea by Cymbopogon cilratus and Ocimum gratissimum A. C. Amadioha and V. I. Obi.............................................................................................................. 85 Control of food-borne fungi by essential oils from local spices in Nigeria M. Y. Nwaiwu and E. O. Imo................................................................................................................ 91 MAŰYÁK fííDOlWÁNYOS AKAÖÉMIA könyvtara с: л 7 Q tJ i. U (} i V

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