Evaluation of strains of Poncirus trifoliata and trifoliate orange hybrids for resistance to Phytophthora root rot

agentes nocivos agronomic characters arbustos ornamentales biological control breeding breeding aims champignon crops cultivos dicotiledoneas dicotyledons disease resistance diseases economic plants enfermedades fungosas facteur nuisible formas de descendencia forme de descendance fungi geraniales injurious factors lutte biologique mildews mycose mycoses objetivo de mejoramiento ornamental plants ornamental shrubs pest control methods phytophthora plantas plantas ornamentales plante plante de culture plante ornementale plants poncirus trifoliata progeny forms resistance to injurious factors resistencia a la enfermedad rootstock crops rutaceae symptome symptoms