Role of landscape diversity in dynamics of abundance of sugar beet pests population in Poltava region

Abstract

Indicators of landscape-ecological diversity of territory of the Poltava region according to remote sensing of the Earth have been established, and its role in determination of dynamics of abundance of sugar beet pests has been found. The greatest landscape-ecological diversity has been calculated to be characteristic for the east and central areas of the Poltava region. The greatest landscape diversity has been revealed for Reshetilovsky (by the average Shannon index it is equal to 1,07 bit/pixel) and Velikobagachansky (1,06 bit/pixel) districts which are in the center of the Poltava region. The least landscape diversity is characteristic for Chernuhinsky, Semenovsky, Globinsky and Kobeljansky districts. General level of the landscape-ecological diversity and its dynamics has its effect on the condition and dynamics of sugar beet pests’ abundance within the Poltava region. Landscape diversity defines the conditions where sharp growth of abundance of sugar beet pests may occur with the highest probability. Low level of landscape diversity displays ecological conditions at which risks of high infestations of sugar beet pest insects are the greatest. Level of landscape diversity in the conditions of the Poltava region, first of all, is defined by the relation of agro ecosystems to the landscape complexes of other types. Large unvaried territories which are occupied by agricultural lands create the conditions for high infestations of sugar beet pest insects.

Keywords

• ландшафтне різноманіття
• динаміка чисельності
• шкідливі комахи
• екологічна стабільність