Diseases

The Area of Claviceps purpurea Tul.- rye ergot.

Object description Download GIS-layers

Authors:

Object specialist - A.P.Dmitriev, GIS-specialist I.A. Budrevskaya

Date of creation:

16.11.2003

Scale:

1:20 000 000

Accuracy of a map:

it is created on materials of maps of natural scale 1:15 000 000

Projection:

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

Basic contents:

Vector map. Zones of distribution and harmfulness are shown by polygons.

Accuracy of the classifier:

Area is divided into zones of harmfulness, strong (disease distribution more than 2,5%) and moderate (disease distribution more than 0,5%)

Procedure of map drawing:

Zones of distribution and harmful activity are identified by results of the analysis of the published cartographical materials and datas on fungus distribution. S.V. Vladimirskiy (1939) map is used as a basis for a map with changes specifications by A.E.Tshumakov (1973). Area of rye is present on the map by regions where the area of crops makes more than 5 %. Therefore in some cases the disease area falls outside the limits of crop area. It is proved by field observation of the specified plant pathologists and testifies that climatic conditions of the region are favorable for disease development even if the areas of crops are insignificant.

Sources of the data:

Vladimirskiy S.V., 1939.Geographical and zones of harm value of ergot in the USSR, Soviet botany, N5. P. 77-87. (in Russian)
Tschumakow A.E., 1973. Rye ergot, The distribution of agricultural crops diseases in USSR in 1968-1972. Leningrad, P. 49-51. (in Russian)

Right and copyright:

All rights reserved. Copyright 2003 © A.P.Dmitriev & M.I.Saulich (vector map, description), T.I.Ishkova (picture).