Pests

The Area and pest damage zones of the Lucerne weevil (Hypera postica Gyll.)

Object description Download GIS-layers

Authors:

Specialist-biologist - G.E. David'yan, GIS-specialist - M.I. Saulich.

Date of creation:

5.08.2003.

Scale:

1:20.000.000.

Accuracy of map:

Created using maps of natural scale 1:25 000 000 and other information found in the literature.

Projection:

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

Basic contents:

Vector map composed from 4 thematic layers. Zones of distribution and harmfulness are shown by polygons.

Accuracy of the classifier:

Insect area is divided into zones of severe mass reproduction and damage, sporadic reproduction and damage, and insignificant reproduction and damage. Zone of low reproduction and damage refers to 2 specimens per square mile, moderate reproduction and damage refers to 2/4 specimens per square mile and high reproduction and damage refers to >5 specimens per square mile. Zones of distribution and damage were defined by an analysis of published cartographical material. Zaslavskij's (1961) map is used as a base map for Hypera postica Gyll. Borders of harmfulness zones are based on Yakhontov's (1934) monograph.

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. Hand drawn maps were scanned, georeferenced and vectorized.

Reference citations:

Koroljeva, I.E., Vilchevskaya, E.V., Ruhovich, D.I. 2003. Digital Arable Land Map. Laboratory of Soil Information of the Dokuchaev Soil Institute, Moscow.
Shamuratov G.Sh., Deordiev I.T. 1990. Lucerne weevil and decrease his population. In: G.Sh. Shamuratov, editor. Collection of Works of Uzbekistan. Nukus.: Izd. Karakalpakstan. 15-17 pp.
Yakhontov V.V. 1934. The alfalfa weevil or Phytonomus (Phytonomus variabilis Hbst.). Moscow, Tashkent: The Scientific Research Cotton Institute of Middle Asia. 238 pp.
Zaslavskij V.A. 1961. Review of the species of the genus Phytonomus Schonh. (Copeoptera, Curculionidae) in the fauna of the USSR. Entomol. Review. 60(3): 625-635.

Right and copyright:

All rights reserved.
Copyright 2003 (c) G.E.David'yan & M.I.Saulich (vector map, description) and G.E.David'yan (picture).