Area and severity of Yellow Leaf Blotch of Alfalfa (Pseudopeziza jonesii Nannf.)

Object description Download GIS-layers


Specialist-biologist A.P. Dmitriev,
GIS-specialist M.I. Saulich

Date of creation:




Accuracy of map:

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


"Alber.s Equal Area Conic for Russia", 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:

In the area of species distribution a zone of disease severity was allocated according to the climatic conditions promoting the fungus development.

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. The area of fungus distribution was identified according to the results of the analysis of the published data on the fungus distribution by Karavyanskii & Mazur (1984). The zone of severity was allocated in regions where weather conditions frequently promote high disease development (Karavyanskii & Mazur, 1975) that reduces hay yield by 30-80% according to: Salunska (1965), Tarkovskii (1974).

Reference citations:

Karavyanskii N.S., Mazur O.P. 1975. Diseases and pests of forage crops. Moscow: Rosselhozizdat. 246 p. (In Russian)
Karavyanskii N.S., Mazur O.P. 1984. Complex system. Zashchita rastenii 10: 24-26. (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.].
Salunska N.I. 1965. Prognosis of yellow leaf blotch of alfalfa in connection with development cycle of its causal agent. Zahyst Roslyn 2: 76-85. (In Ukrainian)
Tarkovskii M.I. 1974. Lucerne. Moscow: Kolos. 240 p. (In Russian)

Right and copyright:

All rights reserved. Copyright 2005© A.P. Dmitriev, M.I. Saulich (VIZR, map and description) and A.P. Dmitriev (VIZR, picture).

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