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1

Control of postharvest pathogens of fruits by culture filtrate from antagonistic fungi

100%
Odebode A. C.
Journal of Plant Protection Research
|
2006
|
tom 46
|
nr 1
1-5
In vitro test of antagonistic activity of culture filtrates from Trichoderma harzianum Rifai and Trichoderma pseudo-koningii Rifai strains against post-harvest pathogens of some fruits were investigated. The undiluted culture filtrates of the two Trichoderma species completely inhibited germination of conidia/spores of all the rot pathogens, but 50% dilution showed varying degree of inhibition of spore germination. T. pseudo-koningii culture filtrate had a rather moderate to strong inhibitory effect on mycelia of the pathogenic fungi. The highest per cent inhibition of 45.6% of mycelial growth was recorded for Aspergillus niger Tiegh.
2

Evidence for probiotic potential of a capsular-producing Streptococcus thermophilus CHCC 3534 strain

100%
Khalil R.
Polish Journal of Microbiology
|
2009
|
tom 58
|
nr 1
49-55
The purpose of this research was to evaluate the probiotic potential of an capsulated Streptococcus thermophilus CHCC 3534 strain. The strain tolerates 0.4% oxgall (bile) and was sufficiently resistant to pH as low as 2.5 for 3 hours of exposure. The strain demonstrated high adherence to human intestinal mucus, and showed unique resistance to different antibiotics. Crude extracts of S. thermophilus CHCC 3534 contained a diffusible antimicrobial compound "bacteriocin" with a broad spectrum that inhibited the growth of closely related lactic acid bacteria and a number of food spoilage bacteria including Salmonella typhimurium and Staphylococcus aureus. The bacteriocin was heat stable, resistant to pH, inactivated by proteolytic enzymes, and resistant to á-amylase and lipase. A SDS-PAGE analysis of the partially purified bacteriocin revealed one component with a molecular weight ranging from 14.4 to 18.4 kDa. The strain may have industrial significance and represents an interesting candidate for use in biopreservation, probiotic food formulations and in the control of spoilage caused by food borne pathogens.
3

The effect of salicylhydroxamic acid on reddish colouration of mechanically injured bulbs of Hippeastrum x hybr. hort. and on the growth and development of Phoma narcissi

100%
Saniewska A., Saniewski M., Horbowicz M.
Pestycydy
|
2007
|
nr 1-2
4
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Risk management on the farm and in the abattoir

80%
Bolton D. J.
Polish Journal of Food and Nutrition Sciences
|
2007
|
tom 57
|
nr 4[A]
53-57
In recent years food safety has been encouraged at the primary production stage through advice and mandated during food processing by legislation. On the farm, several pre-harvest interventions such as competitive inhibition, reduction in hide soiling, vaccination as well as diet manure and slurry management have been explored to control pathogens like Escherichia coli O157. During slaughter chemical dehairing, hide decontamination and carcass decontamination activities have been researched. The objective of this paper is to present an short review of these suggested controls in a risk management framework with E. coli O157 as the target pathogen.
5

Effectiveness of grapefruit extract and Pythium oligandrum in the control of bean and peas pathogens

70%
Patkowska E.
Journal of Plant Protection Research
|
2006
|
tom 46
|
nr 1
15-28
The purpose of the present work was to estimate the effectiveness of grapefruit extract and Pythium oligandrum in protection of common bean, runner bean and pea from soil-borne pathogenic fungi. The investigated preparations were used for seed dressing and spraying plants at the beginning of anthesis. The results pointed out that the applied products considerably improved emergence, healthiness and yielding of the examined plant species. Besides, Biosept 33 SL showed a better effect than Polyversum. Independently on the species, the fewest plants, with the greatest proportion of infected ones and the smallest yield of seeds were obtained from the untreated control. Alternaria alternata, Fusarium spp., Pythium irregulare, Rhizoctonia solani and Sclerotinia sclerotiorum were frequently isolated from infected roots and stem bases as well as from seeds of bean and pea. Fusarium oxysporum tuned out to be dominant. The proportion of the above listed fungi in the treatments with Biosept 33 SL or Polyversum was smaller than in the control. At the same time, the role of those fungi in infecting the plants of common bean, runner bean and pea treated with Biosept 33 SL was only a little smaller than after using Polyversum.
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