Specifics of pesticides effects on the phytopathogenic bacteria

Abstract

Abstract:The data concerning the effects of pesticides of different nature on the phytopathogenic bacteria was examined and summarized. Without extensive research on the mechanisms of interaction between pathogenic bacteria and pesticides in the literature review a similar message about microorganisms of soil and phyllosphere are included. The bacteria can be suppressed permanently by pesticides with a mechanism of action that universally affects biological processes in living systems. Long-term storage, ease of use and fast visible effect are the advantages of synthetic pesticides remedies. But chemical pollution, shifts in the balance of ecosystems, unpredictable effects of chemical pesticides on non-target objects are the drawbacks. Stimulation of resistance response in plants is unifying factor for all types of biopesticides. This is realized through localization of the pathogen during infection, blocking its further penetration, distribution and reproduction. The results of the study of effects of plant protection products on the phytopathogenic bacteria of main crops are described. Among all tested pesticides, thiocarbamate fungicides demonstrated significant inhibitory action on phytopathogens, but their effect may be neutralized by other constituents of multicomponent preparations. Triazole fungicides affect the causative agents of bacterioses of crops at a dose of more than 1% of the active substance in the nutrient medium. Insecticides and herbicides have little or no effect on phytopathogenic bacteria; however they can enhance morphological dissociations of some Pseudomonas strains, thereby increasing their ability to survive. The disadvantage of many biopesticides against phytopathogenic microorganisms is the difference between their efficacy in vitro and in vivo that is why the desired result is not achieved in field condition. In addition, biological pesticides often lose their activity causing the problem of constant search for new active antagonists. The fact that the sensitivity of phytopathogenic bacteria to pesticides is strain-dependent should be considered in practice, particularly, assessment of the antibacterial action of various preparations should not be limited to a single bacterial strain.

Effect of insecticide Alpha Super on phytopathogenic bacteria Рseudomonas syringae of agrophytocenosis of wheat

“…Constantly in agrophytocenosis, phytopathogenic bacteria are exposed to all chemical substances that are used in significant amounts for intensive cultivation of agricultural plants [1]. However, when studying the impact of pesticides on biological objects, this group of microorganisms is almost completely out of the attention of researchers.…”

Influence of Citrates Nanoparticles on Morphological Traits of Bacterial Cells Pseudomonas Syringae Рv. Atrofaciens

“…atrofaciens D13 was isolated from claybrown spot-strokes on a leaf-sheath of wheat, that was collected in the Dnipropetrovsk region. Isolation of bacteria from plant samples, inoculation and cultivation of them on solid medium and preparation of a bacterial suspension were performed according to generally accepted techniques (Patyka et al, 2016(Patyka et al, , 2017.…”

Migration of antibiotics residual quantities in aquatic ecosystems

“…Pesticides are also widely used for dressing seed and planting material, coating, water repellency, encapsulation, toxication, etc. (Xu et al, 2019;Alonso-Díaz et al, 2019;Patyka et al, 2016). The classification of antibiotics and antimicrobial substances of different origin (natural and artificial) is the result of human thought for a better understanding of the process and its systematization.…”