Diseases

Area of Pythium Root Rot of Wheat .

Object description Download GIS-layers

Authors:

Object specialist- V.I.Yakutkin,
GIS-specialist M.I.Saulich.

Date of creation:

27.11.2005.

Scale:

1:20 000 000.

Accuracy of the map:

It is created on the open-published materials 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 have one layer, where the distribution area of the Pythium Root Rot of Wheat is shown by polygons.

Accuracy of the classifier:

In the area of wheat, one zone of the Pythium Root Rot incidence is determined, including Non-Chernozem region, foothill parts of the Northern Caucasus, and Estonia.

Procedure of map drawing:

The published materials are used for map drawing of the disease distribution area (Benken et al., 1977; Novotelnova et al., 1978). Registration and vectoring of raster map are carried out by standard means of GIS-technologies.

Sources of the data:

Benken A.A., Korshunova A.F., Semenov A.Ya., Elbakyan M.A., Khatskevich L.K. 1977. Methodical recommendations on diagnostics of root rot of grain cereals. Leningrad: VIZR, p. 27-37 (in Russian).
Novotelnova N.S. & Pystina K.A. 1978. Root and radical rot of cultural plants. Leningrad: Nauka, 78 p. (in Russian).

Right and copyright:

All rights reserved. Copyright 2005© V.I.Yakutkin (VIZR; raster map, description) & M.I.Saulich (VIZR; vector map).

Note:

The photos of morphological structures of the causal agent and of the affected plant belong to N.S.Novotelnova and K.A.Pystina, 1978 (p.14, 57). Fig.1. Morphological structures of the causal agent of the Root Rot of Wheat (Pythium sp.): a - mycelium, b - zoosporangium (unripe and germinating), c - oogonia with antheridia, d - oospore. Fig.2. Shoots of wheat affected by Pythium Root Rot.