The article considers the possibility of sharing the most common Russian plant protection products against viruses jointly with the acarifagus-Phytoseiulus persimilis Ath.-H. The necessity of their complex application is substantiated; studies of other authors on this topic are noted. The data on the market of vegetables grown on protected ground and biological products of the Russian Federation are analyzed. The effect of the-Viron‖,-Farmaiod‖ and-Enzyme-FITO‖ preparations with antiviral effect on the laboratory population of predatory mites was studied. The mechanism of their interaction is determined. The-Farmaiod‖ drug almost halved the population of Phytoseiulus persimilis on the seventh day; the-Viron‖ drug inhibited the growth of the acariphagus papulation in the first 5 days after treatment; and-Enzyme-FITO‖ did not show a significant negative effect. Recommendations on the safest way to use antiviral agents in combination with acariphagus are given.
Studies have been conducted to assess the effectiveness of bioinsecticide preparation based on the sporocrystalline complex Bacillus thuringiensis and the nuclear polyedrosis virus. Before the preparation usage, a significant excess of the economic threshold of harmfulness for the investigated pest was noted on the experimental area of 1 ha. In the first survey of the site, Plutella xylostella caterpillar numbers on one plant varied within 5-6 caterpillars range when 62% of white cabbage plants were settled. After 3 treatments with an experimental preparation, the number of caterpillars decreased to 98 sp./100 plants and biological efficiency was 80.4%. Also, the effectiveness of the biopreparation in comparison with chemical insecticides was proved by single-factor dispersion analysis (Fobs.= 9.05; Fcrit.= 5.98).
The article presents data from laboratory experiment on the artificial infection of cucumber plants with the green mottle mosaic virus in different concentrations. The dynamics of virus accumulation in each of the experimental groups is described. There is an association for which stage of viral load that correlates with the onset of visible signs of infection and a further increase of the disease symptoms. The obtained data showed that the virus accumulation in the plant obeys the exponential equation. When constructing a graph of the accumulation of viral load, it was noted that the onset of visible manifestations of the disease falls on the linear segment of the curve, and the mosaic manifestation on the exponential segment. The dependence of daily average growth on the virus concentration has not been established. Based on the results of the experiment, we can give reasonable recommendations on the use of quantitative PCR analysis in predicting outbreaks of viral infections in greenhouse complexes based on the viral load in the plant during disease symptoms absence.
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