Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

Bacterial diseases of energy plants

Kalinichenko A., Pasichnyk L., Osypenko S., Patyka V., Usmanova H.

Ecological Chemistry and Engineering. A

2017

Vol. 24, nr 2

169--191

The results of the study of the bacterial pathology of bioenergetic woody plants (poplar, birch), which lead to a significant reduction in harvest or death are described. Various bacterial diseases of these cultures and their pathogens, symptoms of diseases and characteristics of injuries, distribution and harmfulness of pathogens are described. The characteristics of the main bacterial diseases (bacterial cancer and bacterial necrosis of the bark) and less dangerous ones (wetwood, bacterial blight, root disease and tuberculosis) are presented. The causative agent of bacterial cancer is the Xanthomonas populi bacterium (syn. Aplanobacterium populi). As the accompanying microbiota of the causal agents of canker prevail bacteria of the genus Pseudomonas, Erwinia, Bacillus, Corynebacterium, Chromobacterium bergonzini and fungi. The causative agents of bacterial necrosis of the bark poplar are bacteria from genera Pseudomonas, Xanthomonas, Erwinia. It is showed that bacterial wetwood (dropsy) is caused by Erwinia nimipressuralis (according to the later classification the causal agent is renamed as Enterobacter nimipressuralis (according to the modern classification. – Lelliottia nimipressuralis. In addition to this pathogen from the birch trees from the wetwood symptoms was isolated bacterium Erwinia multivora Scz.-Parf. As related bacteria are involved in the pathological process identified as Pseudomonas syringae, Enterobacter ñancerogenus and bacteria of genera Xanthomonas and Bacillus. Methods of protection and prevention bacterial disease with used biopreparation “bio-gel” are given. It was proved the high effectivity of new preparation in process of biologization of agro-industrial.

Przedstawiono wyniki badań bakteryjnych patogenów bioenergetycznych roślin drzewiastych (topoli, brzozy), prowadzących do znacznego zmniejszenia zbiorów lub zaginięcia. Opisano różne choroby bakteryjne i patogeny zaznaczonych roślin, objawy tych chorób, charakterystykę obrażeń, rozmieszczenie i szkodliwość patogenów. Przedstawiono charakterystykę głównych chorób bakteryjnych (rak bakteryjny i martwicę bakteryjną kory) oraz mniej niebezpiecznych (mokradła, zarazy bakteryjne, choroby korzeni i gruźlica). Czynnikiem sprawczym bakteryjnego raka jest bakteria Xanthomonas populi (syn. Aplanobacterium populi). Jako towarzysząca mikroflora czynników wywołujących raka przeważają bakterie z rodzaju Pseudomonas, Erwinia, Bacillus, Corynebacterium, Chromobacterium bergonzini i grzyby. Czynniki wywołujące martwicę bakteryjną kory topoli to bakterie typu Pseudomonas, Xanthomonas, Erwinia. Wykazano, że bakteryzacja mokrego drewno (obrzęk) jest spowodowana przez Erwinia nimipressuralis (zgodnie z późniejsz ą klasyfikacją czynnik przyczynowy został przemianowany na Enterobacter nimipressuralis), (zgodnie z nowoczesną klasyfikacją – Lelliottia nimipressuralis). Oprócz tego jako patogen mokrego drzewa z brzozy wyizolowano bakterię Erwinia multivora Scz.-Parf. Jako powiązane bakterie zaangażowane w proces patologiczny zidentyfikowano Pseudomonas syringae, Enterobacter ñancerogenus oraz bakterie rodzajów Xanthomonas i Bacillus. Podano metody ochrony i zapobiegania chorobom bakteryjnym przy zastosowaniu biopreparatu „biożel”. Udowodniono wysoką skuteczność nowego preparatu w procesie biologizacji agro-przemysłowej.

Specifics of pesticides effects on the phytopathogenic bacteria

Patyka V., Buletsa N., Pasichnyk L., Zhitkevich N., Kalinichenko A., Gnatiuk T., Butsenko L.

Ecological Chemistry and Engineering. S

2016

Vol. 23, nr 2

311--331

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.