Role of Irrigation for Field Crops Entomocoenoses Stabilization in Irrigated Agricultural Landscapes of the Lower Volga Region

DOI

10.2991/aer.k.200202.038How to use a DOI?

Keywords

entomocomplexes, irrigation, microclimate, agrolandscapes, phytophages, entomophages

Abstract

the article presents materials of long-term studies (1988 – 2018) devoted to solving regulation issues of phytosanitary situation in irrigated agrocenoses. The paper outlines the results of studying species abundance and number of insects, patterns of their change under the influence of irrigation in the Lower Volga region. Authors confirmed the formation of mesophytic microclimate parameters under the influence of irrigation, which is one of the leading factors determining the increase in biodiversity of entomocomplexes of irrigated agrocenoses due to the increase in species abundance and number of insects: mesophiles and hygrophilas. The study also shows an increase in species diversity and number of mesophiles and hygrophilas in irrigated agricultural landscapes due to the appearance of additional microhabitats (canals, storage ponds, spillways, etc.). The paper reveals the formation mechanism of polydominant entomological communities in irrigated conditions, which increase the balance of agroecosystem, including optimizing its trophic structure. A changing ecological situation in irrigated agricultural landscapes results in plants cultivation with optimized physiological parameters; in the irrigation conditions, biological features of harmful and beneficial insects development change as well. It is noted that in irrigation conditions, due to a more favorable ratio between pests and beneficial entomofauna, entomocomplexes’ self-regulating ability increases. At the same time, the pesticide load on irrigated agricultural landscapes is reduced by 40–50 %.

Copyright

© 2020, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Viktor Melikhov
AU  - Olga Komarova
AU  - Alexey Novikov
AU  - Elena Ivantsova
AU  - Evgeny Komarov
PY  - 2020
DA  - 2020/02/08
TI  - Role of Irrigation for Field Crops Entomocoenoses Stabilization in Irrigated Agricultural Landscapes of the Lower Volga Region
BT  - Proceedings of the IV International Scientific and Practical Conference 'Anthropogenic Transformation of Geospace: Nature, Economy, Society' (ATG 2019)
PB  - Atlantis Press
SP  - 187
EP  - 192
SN  - 2352-5401
UR  - https://doi.org/10.2991/aer.k.200202.038
DO  - 10.2991/aer.k.200202.038
ID  - Melikhov2020
ER  -