Résultat de la recherche
20 recherche sur le mot-clé
'Biotypes' 
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L. Wilhoit ; T. Mittler | 1991
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D. Peters ; D. Kerns ; C. Puterka ; R. McNew | 1988
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J. Auclair ; R. Aroga | 1987
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J. Simon ; M. Parent ; J. Auclair | 1982
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J. Eisenbach ; T. Mittler | 1987
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R. Bowling ; G. Wilde ; D. Margolies | 1998Greenbugs, Schizaphis graminum (Rondani),present a well-documented example of the ability of insects to overcome designed host plant resistance. Four greenbug biotypes have been identified on wheat, Triticum aestivum L., and 3 on sorghum, Sorghu[...]
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The existence of a continuous array of sympatric biotypes-from polymorphisms, through ecological or host races with increasing reproductive isolation, to good species-can provide strong evidence for a continuous route to sympatric speciation via[...]
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J. Araya ; S. Cambron ; R. Ratcliffe | 1996The life cycle of apterous and alate viviparae of pink and green color forms of the English grain aphid, Sitobion avenae (F.), were compared at 20 +/- 1 degrees C and a photoperiod of 14:10 (L:D) h, using individually caged aphids that were exam[...]
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G. Puterka ; W. Black IV ; W. Steiner ; R. Burton | 1993
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