Diseases

Area of the barley net blotch (pathogen - Pyrenophora teres Drechsler. Syn.: Helminthosporium teres Sacc. Anamorph. - Drechslera teres (Sacc.) Shoemaker)

Object description Download GIS-layers

Authors:

Specialist-biologist - O.S. Afanasenko, GIS-specialist - I.A. Budrevskaya.

Date of creation:

30.08.2003.

Scale:

1:20 000 000.

Accuracy of map:

Created using maps of natural scale 1:40 000 000.

Projection:

"Alber's Equal Area Conic", 9, 1001, 7, 100, 0, 44, 68, 0, 0

Basic contents:

Vector map. Distribution and zones of disease severity are shown by polygons.

Accuracy of classifier

Area of disease distribution has been subdivided into 3 zones of disease severity: In areas of high severity, disease occurs 3 to 4 times per decade and injects 60-90% of leaf area. In areas of moderate severity, disease occurs 3 to 4 times per decade and infects 30-50% of leaf area. Areas of low severity can have disease every year but at low frequency, only 0-20% of leaf area is infected. Zones of disease severity are based on Ishkova et al. (2000), Sanin (1995), Gaike (1976), Kashemirova (1995), Klimenko (1994), Kushnirenko (1987), Hasanov (1992), and Novozhilov and Zakharenko (2000).

Method of map production:

Published literature was reviewed, including Atlases, monographs and papers. Occurrence data were obtained from herbarium specimens, floras, monographs and papers. Data were then compiled through scanning and geo-referencing to develop a composite vector map. The biologist, together with the GIS specialist, drew a composite weed distribution area based on compiled data.

Reference citations:

Gaike M.V. 1976. Perspectives of barley breeding in Latviiskaya SSR and resources for its improving. Summary of the PhD thesis. Leningrad. 28 pp. (In Russian)
Hasanov B.A. 1992. Imperfect fungi are the causal agents of the main cereal diseases in Middle Asia and Kazakhstan. Summary of the Doc. Thesis, Moscow. 44 pp. (In Russian)
Ishkova T.I., Berestetskaia L.I., Gasich E.L., Levitin M.M., Vlasov D.U. 2000. Diagnostic of the main diseases of cereals. Saint Petersburg. 76 pp. (In Russian)
Kashemirova L.A. 1995. Phytosanitary diagnostic systems of spring barley protection against spot and net "Helminthosporium" blotches. Summary of the PhD thesis, Moscow. 20 pp. (In Russian)
Klimenko O.P. 1994. Structure of causal agents of barley net and spot blotches on virulence and methods of artificial infection phones for. Summary of the PhD thesis, Kiev. 20 pp. (In Russian)
Kushnirenko I.U. 1987. Net blotch of barley in South Ural region and resources for breeding of resistance varieties. Summary of the PhD thesis, Leningrad. 20 pp. (In Russian)
Mathre D.E., ed. 1997. Compendium of barley diseases. APS PRESS. 90 pp.
Novozilov K.V., Zakharenko V.A., eds. 2000. Levels and tendencies of variability of species composition and intrapopulation structure, areas of complexes of harmful and useful organisms and forecast of dangerous phytosanitary situations on zones of the country. St. Petersburg. 100 pp. (In Russian)
Sanin S.S. 1995. Phytosanitary monitoring: modern state and ways of improvement. Problems of Optimization of Phytosanitary State in Plant Industry. Proceeding of All-Russian Meeting on Plant Protection. St. Petersburg. 166-175 pp. (In Russian)

Right and copyright:

All rights reserved.
Copyright 2003 © O.C. Afanasenko & I.A.Budrevskaya.