Agriculture and forestry

Butkalyuk Tatyana Omelyanovna – Candidate of Agricultural Sciences, Associate Professor of the department of botany, genetics and plant protection, Vinnytsia National Agrarian University (21008, Vinnytsia, 3 Solnyschnaya St., e-mail: bto@vsau.vin.ua)

Verheles Pavel Nikolaevich – Candidate of Agricultural Sciences, Associate Professor of the department of botany, genetics and plant protection, Vinnytsia National Agrarian University (21008, Vinnytsia, 3 Solnyschnaya St., e-mail: pasha425@vsau.vin.ua)

Pinchuk Natalya Vladimirovna – Candidate of Agricultural Sciences, Associate Professor of the department of botany, genetics and plant protection, Vinnytsia National Agrarian University (21008, Vinnytsia, 3 Solnyschnaya St., e-mail: pnv@vsau.vin.ua)

Kovalenko Tatyana Methodivna – Candidate of Agricultural Sciences, Associate Professor of the department of botany, genetics and plant protection, Vinnytsia National Agrarian University (21008, Vinnytsia, 3 Solnyschnaya St., e-mail: ktm@vsau.vin.ua).

In the article the results of study of alternaria of a spring rape in the cut of study of factors of his prevalenceand harmfulness are reflected. The analysis of development of the phytopathogene, taking into account thecalendar and phenological stages of height of plants is conducted. The conclusion in relation to the mode of favourableness of the prevalence of illness on plants is drawn. In detail the criterion ofharmfulness of illness on the basis of structural analysis of the individual productivity of the plants, staggeredby a different degree in the system of specific scale is analysed. Such important indexes as declines of general mass arethus appraised 1000 seeds,exit of seed from a plant and common decline of harvest are showed.

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