Different forms of nitrogen influence to different degrees the resistance of host plants against facultative parasites. A possible explanation for this phenomenon [Zea mays, Triticum aestivum, Lycopersicon esculentum, nitrogen fertilizers, Hungary]

agricultural chemicals agronomic characters biological competition biological control biological properties breeding breeding aims cereales cereals crops cultivos cultivos de grano dicotiledoneas dicotyledons eastern europe economic plants engrais europa europa oriental europe europe orientale feed crops feed grasses fertilizantes nitrogenados fertilizers glumiflorae grain crops gramineae gramineas graminee grasses hongrie hungary hungria industrial crops lutte biologique lycopersicon lycopersicon esculentum monocotyledons nitrogen fertilizers objetivo de mejoramiento oil crops parasite parasites parasitism parasitisme parasitismo pest control methods pest resistance plantas plantas azucareras plantas feculentas plantas forrajeras plantas industriales plantas oleaginosas plante plante de culture plante industrielle plants produit agrochimique resistance to injurious factors resistencia a las plagas solanaceae starch crops sugar crops trigo triticum triticum aestivum tubiflorae wheats zea mays