The Effect of Fertilization and Irrigation on Root and Crown Rot of Remontant Raspberry Cultivar Lyulin

T. Vatchev, E. Tsolova, S. Maneva

Резюме: Three-year field experiment was carried out between 1999 and 2001 to evaluate the effects of different rates of NPK fertilization and irrigation regime on root and crown rot of remontant raspberry cultivar Lyulin. Various soilborne pathogens including oomycetes Phytophthora citricola, Phytophthora spp. and Pythium spp. along with fungal species Rhizoctonia solani, Verticillium dahliae and Fusarium spp. all obtained from roots and basal stems of symptomatic plants were found associated with root and crown rot disease complex of raspberry. The incidence of cane death was reduced by 94.2% and 90.6%, respectively when plants were fertilized annually with optimum NPK 60: 90: 0 kg/ha + 80% irrigation rate or NPK 90: 18: 4 kg/ha + 100% irrigation rate. In comparison, disease incidence was significantly higher (13.8% and 16.2%) in untreated (unfertilized) control plots with 60% irrigation rate and in plots the received an excessive NPK 120: 270: 80 fertilizers kg/ha and 120% irrigation rate, respectively.

Ключови думи: fertilization; irrigation; raspberry; root and crown rot; soilborne pathogens

Дата на публикуване: 2017-02-15