Influence of biologically active substances, chemicals and growth regulators on diseases of conifers in urban conditions

Lyudmila Lyashcheva,Aleksandr Lyashchev,Irina Prok,N.A Shyurova,O.V Tkachenko

doi:10.1051/bioconf/20224302024

Lyudmila Lyashcheva, Aleksandr Lyashchev + Show 3 more

Open Access

https://doi.org/10.1051/bioconf/20224302024

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Abstract

The objects of study were coniferous plants aged from 6 to 10 years. The study involved such plants as Siberian spruce (Pícea obováta), prickly spruce Hoopsi (Picea pungens Hoopsii), western thuja Smaragd (Thuja occidentalis Smaragd), thuja western Brabant (Thuja occidentalis Brabant). The subject of the study was the pathological symptoms manifested on the aboveground plant organs. The plants were planted in 2015 at the age from 6 (thuja Smaragd and thuja Brabant) to 10 (prickly spruce and Siberian spruce) years. The studies were conducted from May 2016 to September 2018 inclusive. During the initial examination, which was carried out on May 28, 2016, on all conifers, there was a loss of decorativeness, partial premature drying of shoots and falling of needles. When using biological products, a persistent stimulating effect is very noticeable — the general condition of conifers improves, this makes it possible to recommend tank mixtures for use, the composition of which is less toxic. Thuja Brabant turned out to be the most unresponsive to drug treatment.

Highlights

Plants in the city decorate streets and courtyards, and have a significant impact on the microclimate of green areas
Of the coniferous plants growing in the northern forest-steppe, thuja takes the first place in phytoncides, followed by pine, spruce, fir and juniper
The recovery went on for three years and we have shown the results in improving the biometric indicators of both common spruce, prickly spruce, and Thuja Brabant

Summary

Introduction

Plants in the city decorate streets and courtyards, and have a significant impact on the microclimate of green areas. Not every coniferous plant is adaptable and can grow for a long time and retain its decorative effect in urban conditions. Rapid aging of trees occurs due to the influence of air pollution, soil salinity, anthropogenic factors and many others. In this regard, non-infectious diseases develop, plants weaken and rapid aging occurs. Due to the large scale of construction and landscaping of territories in our city, one of the main tasks of phytopathology is to increase the resistance of tree and shrub species in the city to diseases [7]

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