Karpovych M. Ecological and Forestry Features of Populations Dendrolimus pini L. in Pine Plantations of Central Polissya Ukraine.

Українська версія

Thesis for the degree of Candidate of Sciences (CSc)

State registration number

0421U102097

Applicant for

Specialization

  • 16.00.10 - Ентомологія

29-04-2021

Specialized Academic Board

Д 26.004.02

National University of Life and Environmental Sciences of Ukraine

Essay

In the dissertation on the basis of scientific literary sources and their own observations, the most characteristic biological, ecological and physiological features are given, and the distribution of pine silkworm (Dendrolimus рini L.) in the research area. The phytophagus multiplication is established, depending on weather-climatic factors and power quality. Detailed the specifics of the development of pest caterpillars depending on the quality of a feed substrate. The monitoring of various stages of development of pine silkworm and trophic, ecological ties with natural populations of parasites, predators and entomopathogens are substantiated. It was noted that the outbreaks of mass reproduction of pine silkworm significantly worsen the phytosanitary state of forest plantations, which leads to weakening of trees, reducing the growth of wood, full or partial drying of trees, both individual and entire plantings. Experimentally substantiated, tested and introduced the original technology of integrated protection of pine forests from pine silkworm, according to the results of the monitoring unit with a visual, instrumental and physiological control. Technology provides for resettlement on the trees of laboratory cultures of entomophages trichograms and television with the level of efficiency of the original technology of 90.1 % compared to a similar index of chemical standard – 81.7 %. The use of microbiological preparations, in particular, at the beginning of migration of caterpillars of pine silkard, one receiver of the spraying of plant residues and surface of the soil of potable circles, in diameter of 1.8–2.0 m, 5 % aqueous solution of microbiological preparation Boeerin with efficiency 56.4–64.9 %. The developed technology is characterized by pronounced technical efficiency and is not inferior to existing technologies using chemical insecticides. The advantage of the proposed technology includes environmental and safety on natural populations of entomophages, warm-blooded animals and people and providing a long process of self-regulation of the entomocomputer of pine plantations, which excludes mass local flares of phytophagus. Refined technology of physiological monitoring of pine silkworm, which provides for the evaluation of the reproductive potential of femits. Lifetime preparation of gonads of phytophagia testifies to the nature of the formation of components of gonads of gonads, vitex and ovariol. Ooples of the femes, which lived with a complete feed for optimal hydrothermal conditions functioning in cyclic mode, with a balance between oocytes and trophic cells. In the conditions of power caterpillars, physiologically inferior feed, there is a dysfunction of the development of components of gonads of gonads of gonads of gonads and vitality, and separate ovaries undergo irreversible morphological changes, and real fertility of females decreases by 55–70 %. The terms, norms and multiplicity of the settlement of laboratory cultures of entomophages are substantiated. It is shown that the effectiveness of biological protection is an average of 69.1–90.4 %, and does not inferior to a chemical standard – 81.7 %. The established role of natural populations of predatory arthropods – tourons and stafilinides – in reducing the number of range caterpillars of pine silkworm – 17 types of tourons and 5 species of stafilinides were revealed. The larvae and imago predators are intensively eating primarily physiologically weakened caterpillars of pine silkworm, which are concentrated in leafy precipitation and on the surface of the soil. The level of predation varies from 29.7 to 36.5 %, which allows to optimize the system of biological protection of pines from pine silkworm. Thus, the study is based on the objective and critical analysis of primary sources, as well as data of experimental data on the use of entomophages in pine plantations. Exhaustive threshold levels of pine silkworm for different age categories of pine plantations. Experimentally substantiated toxicological parameters of use of mushroom preparations of brewerin and metarzine against range caterpillars, phytophagus. The biocenotic essence of the implementation of the proposed technology, the level of preservation, accumulation, accumulation of natural populations of entomopathogens, as the basis for modern self-regulation of the pine entomocomplex, which completely causes uncontrolled flares of pine silkworm.

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