Acta Phytopathologica et Entomoligica 28. (1993)
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/ DISEASES Prevalence and mycotoxin production of Fusarium species isolated from wheat grains in Hungary A. Tóth, I. Barna- Vetró, A. Gyöngyösi, A. Pomázi, A. Szécsi and L. Hornok . 3 Toxin production by Alternaria helianthi, the leaf-spot and blight pathogen of sunflower S. C. Sharma, M. S. Ghemawat and J. M. Agrawat...................................................13 A list of proposed letter codes for hosts and non-hosts of plant viruses J. Horváth......................................................................................................................................21 Phytoalexins in rice—Pyricularia oryzae interaction: Factors affecting phytoalexin production S. Kumar and R. Sridhar ...................................................................................................59 INSECT PESTS Identification key for alate aphids caught in yellow pan traps Zs. Basky................................................................................................................................. 71 PESTICIDE CHEMISTRY Seed treatment chemicals in relation to sesame bacterial blight control A. D. Акра, 1. D. Erink and S. M. Misari.........................................................................123 Adsorption of some nonionic tensides on different carriers II. Adsorption capacity T. Cserháti....................................................................................................................................129 Book Reviews........................................................................................................................................137 Contents MAGYAR TUDOMÁNYOS AKADÉMIA KÖNYVTÁRA 315900