Area of distribution and severity of Venturia inaequalis G. Winter

Object description Download GIS-layers


Specialist-biologist - I.V. Bilder, GIS-specialist - M.I. Saulich.

Date of creation:



1:20 000 000.

Accuracy of map:

Map was created based on materials of map of natural scale 1:33 000 000.


"Equal Albers to the USSR ", 9, 1001, 7, 100, 0, 44, 68, 0, 0

Basic contents:

Vector map. Area of species distribution and zones of disease severity are shown by polygons.

Accuracy of classifier:

Distribution is represented by regions where the scab is registered on apple according to published scientific materials. Within the limits of the disease area four zones of severity were determined. In the zone of high disease severity epiphytotics occur one time in 2 years as a minimum. In the zone of moderate diseases severity they occur one 1 time in 3 years. In the zone of low disease severity they occur 1 time in 5 years, and in the zone of very low Apple Scab severity they occur 1 time in 8-10 years.

Method of map production:

Scientists were given maps with boundaries of Oblasts and arable lands. After reviewing historic literature, species distribution was hand drawn on maps. If data were on the Oblast-level, distribution is on the Oblast level. In some cases, Oblast.s are further refined by boundaries of the Arable Land Map (Koroljeva et al., 2003). Hand drawn maps were scanned, georeferenced and vectorized. Based on the following sources the map demonstrates the disease distribution within the limits of the former USSR that is conterminous with the areas of apple and other fruit cultures: Ablakatova (1965), Fedorova (1971, 1977), Shumakova (1963), Tochenov (1984). The following sources were used to determine the above mentioned zones of disease severity: Fedorova (1971, 1977), Shumakova (1963).

Reference citations:

Ablakatova A.A. 1965. Mycoflora and the main fungal diseases of fruit plants of the south of the Far East. Moscow-Leningrad: Nauka. 146 p. (In Russian)
Fedorova R.N. 1971. Apple scab. Procedure of the local long-term forecast of diseases of plants. Leningrad: VIZR. 70-71 p. (In Russian)
Fedorova R.N. 1977. Apple scab. Leningrad: Kolos. 64 p. (In Russian)
Koroljeva IE, Vilchevskaya EV, Ruhovich DI. 2003. Digital Arable Land Map. Laboratory of Soil Information of the Dokuchaev Soil Institute, Moscow, Russia [Based on: Yanvareva LF. (ed.), Martynjuk KN., Kisileva NM. 1989. Map of Land Use, Faculty of Geography, Moscow State University, Moscow, Russia.].
Shumakova A.A. 1963. Apple scab. In: Polyakov I.Ya., Chumakov A.E., eds. Distribution of pests and diseases in agricultural crops in the USSR in 1962 and the forecast of their appearance in 1963. Leningrad: VIZR. 261-266 p. (In Russian)
Tochenov V.V., ed. 1984. Atlas of the USSR. Moscow: GUGK. 260 pp. (In Russian)

Right and copyright:

All rights reserved. Copyright 2004 © I.V. Bilder & M.I. Saulich (VIZR; vector map, description); I.V. Bilder (VIZR, photo).

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