Acta Phytopathologica et Entomoligica 24. (1989)

Proceedings of the 1st International Symposium on Maize Arthropods August, 1987, Gödöllő, Hungary ............................................................................................................. 5 Composition and density fluctuation of the invertebrate fauna occurring in a maize field at Melle (Belgium) Alderweireldt, M......................................................................................................................... 5 Susceptibility of four local maize varieties to corn borer infestation under natural condi­tion in Egypt Ali, M. A. et at...........................................................................................................................13 The expression of maize resistance to the spotted stem borer, Chile parteUus (Lepidoptera : Pyralidae) in relation to plant age at infestation Ampofo, J. К. 0......................................................................................................................... 17 The effect of benzoylphenyl urea moulting inhibitors on larvea and eggs of the european corn borer, Ostrinia nubilalis Hbn. (Lepidoptera: Pyralidae) Ascher, K. R. S. et al......................................................................................................................25 Relative susceptibility of certain sorghum varieties to infestation with the corn borer, Sesamia cretica Led. (Lepidoptera: Agrotidae) Attia, M. B. and A. I. Farag................................................................................................31 Flight of moths of the european corn borer (Ostrinia nubilalis) in Zemun Polje in the period 1966-1985 Baca, F. and D. Hadzistevic.....................................................................................................37 Host plant resistance: maize resistance to the european corn borer (Lepidoptera: Pyra­lidae) Barry, B. D........................................................................................................................................43 The genetics of morphological and biochemical markers in two Heliothis species Bartlett, A. C....................................................................................................................................49 Biological observation and control of the frit fly (Oscinella frit L., Diptera, Chloropidae) on maize plantations in the Wielkopolska region, Poland Bubniewicz, P....................................................................................................................................55 Effect of intercropping maize-beans on aphids and aphidophagous insects in corn fields of southern Quebec, Canada Coderre, D. et al...............................................................................................................................59 Adaptive dispersal in the european corn borer Ostrinia nubilalis (Lep.: Pyralidae) in Northwestern Switzerland Cordillot, F. and P. Duelli.........................................................................................................65 The influence of the surroundings on arthropod diversity in maize fields Duelli, P. et al...................................................................................................................................73 Present situation of arthropod pests in maize in the northeast of Spain Eizaguirre, M. and R. Albajes................................................................................................77 Insect pest of maize in Bulgaria and their control Gerginov, L........................................................................................................................................81

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