Pathogen infestation of potato tubers of satina cultivar depending on irrigation, cultivation technology and nitrogen fertilization.

摘要

In the experiments carried out in 2006-2007 the influence of irrigation, cultivation technology (low-, medium- and high-input) and nitrogen fertilization (0, 60, 120, 180 kg N/ha) on pathogen infestation of potato tubers and their cracking was investigated. Irrigation increased the infestation of tubers by Phytophthora infestans (late blight). Technology cultivation with increased level of production intensity decreased the share of tubers with symptoms of common scab. Most of tubers infected by Rhizoctonia solani was stated in mediuminput technology. Cultivation of potatoes according low- and medium-input technology increased the percentage of tubers with symptoms of alternaria blight. Moreover the low-input technology decreased the share of tubers with late blight. Increasing doses of nitrogen caused the decrease of infected by R. solani area and the increase of percentage of cracked tubers at the dose of 180 kg N/ha.