Dependence of Ditylenchus destructor thorne population density from soil humidity and temperature in the North-East of Ukraine
DOI:
https://doi.org/10.15587/2519-8025.2017.105511Keywords:
Ditylenchus destructor, population density, temperature, humidity, abiotic factors, correlations, regressionAbstract
Aim. The aim of the study – to establish the parasitical activity of Ditylenchus destructor Thorne depending on abiotic factors under conditions of the Northern East of Ukraine.
Methods. The studies were carried out in artificially controlled conditions of the temperature and humidity. The microscopic analysis was used.
Results. It was established, that the parasitological activity of caulescent nematodes causes the injury of potato and determines the degree of its harmfulness in Northern-Eastern regions of Ukraine. There was studied the influence of two abiotic factors – temperature and humidity on the development of these nematodes. Just they are important limiting ecological factors of the increase of зpopulation density and aggressiveness of the species under conditions of the Northern East of Ukraine.
Conclusions. With the increase of the soil humidity from 40 to 80 % grows the number of injured stems and tubers of potato. They are less changed at the low soil temperature. The maximal potato injury was at the morning temperature 17–20 °С and day one 20–24 °С. The established correlative-regressive dependencies may be used at the elaboration of prognoses of the development and arrangement at fighting against this vermin on potato crops
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Copyright (c) 2017 Katerina Borodina, Roman Bilash
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