Diseases

Distribution and disease severity zone of the Common Scab of Potato [Streptomyces scabies (Thaxter) Waksman et Henrici]

Object description Download GIS-layers

Authors:

Specialists-biologists E.I. Gultyaeva, M.M. Levitin;
GIS-specialist M.I. Saulich

Date of creation:

10.098.2004

Scale:

1:20 000 000

Accuracy of map:

Map was created based on materials of map of natural 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. Area of species distribution and zones of disease severity are shown by polygons.

Accuracy of classifier:

Severity zone was determined in the former USSR within the limits of the Common Scab of Potato distribution zone. Based on the following sources, regions were included where the disease distribution can exceed 20%: Anonymous (1969), Volovik & Litun (1975), Bus.ko (1990).

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. In published materials the Common Scab is described as a widespread disease of potato in all regions of the crop cultivation. Zones of severity were determined in regions where the disease causes significant losses. According to materials published by Bus'ko & Ivanuk (1990) the scab disease severity in Byelorussia rises from 32% in northern regions to 40-45% in southern and central ones, and the disease distribution is 47 to 100%. According to the following sources, in North-West, Central, Volga-Vyatka, Central Black Earth and Far-Eastern regions of Russia the number of tubers infected by scab exceeds more than 20%: Anonymous (1969), Volovik & Litun (1975). According to requirements of Russian Standard (GOST 7001-91) for seed potato material, the threshold number of tubers infected by scab is 0.5% to 1.5% (for super-elite and elite seed materials, respectively), not exceeding 2 to 3% in food potato; moreover, less than 1/4 tuber surface can be infected. Definition of the disease distribution was carried out on vector layer of potato growing regions.

Reference citations:

Anonymous. 1969. Distribution of pests and diseases of grown crops in the USSR in 1968 and prediction of them appearance in 1969. Moscow: Rossel.hozizdat. 128 p. (In Russian)
Bus.ko I.I. 1990. Features of pathogenesis of Common Scab of Potato and development of protection measures in Byelorussia. Abstract of PhD thesis. Minsk: Samokhvalovichi. 20 p. (In Russian)
Denisenko V.A. 2000. Common Scab of Potato. Akhova Raslin, 3: 23-24. (In Russian)
GOST 7001-91. Seed potato. Technical requirement. Moscow: Committee of standardization and meteorology of USSR. 7 p. (In Russian)
Ivanyuk V.G., Busko I.I. 1990. Caused agents of Common Scab of Potato and protection measures in Byelorussia conditions. Samersov V.F., ed. Collection of repots of Byelorussian research institute of plant protection. V. 15. Minsk: Uradzhai. 58-63 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.].
Popkova K.V., Shneider A.S., Volovik A.S., Shmuglya V.A. 1980. Diseases of potato. Moscow: Kolos. 304 p. (In Russian)
Randalu I. 1972. Diseases of potato in Estonian SSR and protection measures. Reports of combined potato symposium carried out according to agricultural cooperation between the USSR and Finland. Estonian science research institute of plant industry and melioration; 1972 August 2-8; Harukski district. Saku: Estonian science research institute of plant industrial and melioration. 57-62 p. (In Russian)
Sedova V.I. 1999. Common Scab of Potato. Zashchita rastenii i karantin, 5: 18 (In Russian)
Volovik A.S., Litun B.P. 1975. Harmfulness of potato diseases. Zashchita rastenii, 7: 4-6. (In Russian)

Right and copyright:

All rights reserved. Copyright 2003© E.I. Gultyaeva, M.M. Levitin & M.I. Saulich (vector map and description); E.I. Gultyaeva (photo).