Diseases
Area and severity zones of Spongospora subterranea (Wallr.) Lagerh.
Object description Download GIS-layers
Authors:
Object specialist V.I.Yakutkin,GIS- specialist M.I.Saulich.
Date of creation:
15.11.2005.Scale:
1:20 000 000.Accuracy of map:
It is created on information taken from the open-published literature and maps of scale 1:33 000 000.Projection:
"Alber`s Equal Area Conic for the USSR",9,1001,7,100,0,44,68,0,0.Basic contents:
Vector map has three layers, where the potato area and severity zones of Powdery Scab are shown by polygons.Accuracy of the classifier:
In the potato area two zones of different severity of S.subterranea are determined. The first is the zone of its low severity, where number of affected tubers is 3% and less (Kirov and Kaluga Regions of Russia). The second zone has moderate severity of the disease, where its occurrence on tubers reaches 10% (Belarus, Leningrad region of Russia).Procedure of map drawing:
Published materials are used for map drawing (Gorlenko, 1968;Volovik et al., 1971; Sizova,1976). Zones of different severity of the Powdery Scab of potato are established after known data (Gorlenko,1968; Volovik et al., 1971). The registration and vectoring of raster map are carried out by standard means of GIS-tecnologies.Sources of the data:
Gorlenko M.V. 1968. Powdery scab of potato. Agricultural phytopathology. Moscow: Vysshaya shkola, p.260-261 (in Russian).Sizova T.P. 1976. Division Myxomycota. Fungi. Moscow: Prosveshchenie, p.7-12 (in Russian).
Volovik A.S., Borisenok A.B., Erokhina S.A., Zakharova T.I. 1971. Fungal diseases of potato. In: Polyakov I.Ya., Minkevich I.I., eds. Pests and diseases distribution on agricultural crops in RSFSR in 1970 and the forecast of their appearance in 1971. Moscow: MSKH RSFSR, VIZR: p.168-178 (in Russian).