Crop rotation as a factor differentiating the intensity of the diseases of field pea (Pisum sativum L.)

Abstract

The research was conducted in the years 1998-2001. The aim of the research was to determine the health of the field pea cv. Kormoran grown in four various crop rotations and to determine the patogens causing the root-rot. On the pea plants the following diseases were found: root rot (complex of fungi), ascochyta blight (Ascochyta pisi, Phoma pinodella, Mycospaerella pinodes) and fusarium foot rot (Fusarium spp.). All the diseases occurred in the highest intensity on the pea cultivated in three-field crop rotation without manure. The weather conditions affected the intensity of the diseases. From the roots of seedlings with the symptoms of root rot 44,7% of fungi with pathogenic potential in relation to pea were obtained. The most commonly isolated were Fusarium oxysporum (26,7% of all isolates), Rhizoctonia solani (10,7%), F.solani (3,3%), F.avenaceum (2,7%) and F.equiseti (1,3%). From the infected root necks, 55,3% of potential pathogens of field pea were obtained. Among the isolates the most commonly found was F.oxysporum (31,1% of all isolates). Other fungi of the Fusarium genus constituted 15,4% of isolates, R.solani 7,0%, and Sclerotinia sclerotiorum 1,8%.

Keywords

• field pea
• crop rotation
• diseases
• seedlings
• pathogenic fungi