scholarly journals Antimicrobial efficacy of cinnamon, ginger, horseradish and nutmeg extracts against spoilage pathogens

2010 ◽  
Vol 90 (2) ◽  
pp. 65-70 ◽  
Author(s):  
Hortense N. Mvuemba ◽  
Sarah E. Green ◽  
Apollinaire Tsopmo ◽  
Tyler J. Avis
Keyword(s):  
Aspergillus Niger ◽  
Mycelial Growth ◽  
Fusarium Sambucinum ◽  
Rhizopus Stolonifer ◽  
Ginger Extract ◽  
Dry Rot ◽  
Cinnamon Extract ◽  
Cavity Spot ◽  
Potato Dry Rot

In the search for alternatives to the use of synthetic fungicides, aqueous spice extracts were evaluated for their effects on the mycelial growth of various spoilage pathogens and their ability to control potato dry rot and carrot cavity spot in vivo. Results showed that cinnamon, ginger and nutmeg significantly inhibited the mycelial growth of Aspergillus niger (Ascomycota), Fusarium sambucinum (Ascomycota), Pythium sulcatum (Oomycota) or Rhizopus stolonifer (Zygomycota), whereas horseradish extract did not lead to the inhibition of any microorganism at the tested concentration. Among the most effective extracts, 0.05 g mL‑1 of cinnamon extract completely inhibited A. niger and P. sulcatum, and 0.10 g mL‑1 of cinnamon extract completely inhibited F. sambucinum. A concentration of 0.05 g mL‑1 of ginger extract also caused 100% inhibition of P. sulcatum. In vivo, cinnamon extract significantly reduced lesions of potato dry rot and carrot cavity spot, and ginger extract reduced lesions of carrot cavity spot. These results indicate that aqueous cinnamon and ginger extracts could provide an alternative to the use of synthetic fungicides to control these pathogens.

Draft Genome Sequence of Potato Dry Rot Pathogen Fusarium sambucinum Fckl. F-4

2016 ◽  
Vol 94 (3) ◽  
pp. 266-269 ◽  
Author(s):  
Virupaksh U Patil ◽  
Vanishree G. ◽  
Vinay Sagar ◽  
SK Chakrabarti
Keyword(s):  
Genome Sequence ◽  
Draft Genome ◽  
Draft Genome Sequence ◽  
Fusarium Sambucinum ◽  
Dry Rot ◽  
Potato Dry Rot

scholarly journals Effect of different salts on the development of Fusarium solani var. coeruleum, a causal agent of potato dry rot

2009 ◽  
Vol 89 (1) ◽  
pp. 1-6 ◽  
Author(s):  
Mélanie R. Mecteau ◽  
Joseph Arul ◽  
Russell J. Tweddell
Keyword(s):  
Fusarium Solani ◽  
Sodium Benzoate ◽  
Mycelial Growth ◽  
Trisodium Phosphate ◽  
Aluminium Chloride ◽  
Potassium Sorbate ◽  
Sodium Metabisulfite ◽  
Dry Rot ◽  
Potato Dry Rot

The objectives of this study were (1) to evaluate the effect of different salts on the in vitro development of Fusarium solani var. coeruleum, and (2) to evaluate the efficacy of the salts for reducing dry rot severity caused by the pathogen in potato tubers. The study showed that several salts significantly inhibited the mycelial growth of F. solani var. coeruleum. Aluminium acetate, aluminium chloride, sodium benzoate, sodium metabisulfite, potassium sorbate and trisodium phosphate completely inhibited mycelial growth. Exposure of F. solani var. coeruleum conidia to aluminium acetate, potassium sorbate, sodium benzoate, sodium metabisulfite or trisodium phosphate at 0.2 M resulted in 100% mortality of the conidia after 1 h while aluminium chloride and aluminium lactate caused 100% mortality after an exposure of 24 h. In order to evaluate the effect of salts on potato dry rot development, F. solani var. coeruleum-inoculated tubers were treated with the different salts and disease severity was evaluated following an incubation period of 7 d. Among the test salts, only aluminium chloride caused a significant reduction in potato dry rot compared with the control. The study points out the possibility of using aluminium chloride to control potato dry rot.

scholarly journals Effet de l’association de certains fongicides avec le chlorure de calcium sur le développement d’un complexe fongique responsable de la pourriture des pommes en conservation

2007 ◽  
Vol 88 (1) ◽  
pp. 17-26 ◽  
Author(s):  
Khaled Attrassi ◽  
Rachid Benkirane ◽  
Benaissa Attrassi ◽  
Allal Douira
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Aspergillus Niger ◽  
Fusarium Oxysporum ◽  
Alternaria Alternata ◽  
Penicillium Expansum ◽  
Rhizopus Stolonifer ◽  
Cladosporium Herbarum ◽  
Trichothecium Roseum

L’utilisation du bénomyl et du thiabendazole (famille chimique des benzimidazoles), de l’azoxystrobine et du pyriméthanil montre, autant in vitro qu’in vivo, que ces fongicides sont faiblement à moyennement efficaces contre les agents pathogènes suivants : Rhizopus stolonifer, Penicillium expansum, Aspergillus niger, A. fumigatus, Alternaria alternata, Cladosporium herbarum, Fusarium oxysporum, Saccharomyces cerevisiae, Monilia fructigina, Cryptosporiopsis malicorticis, Spilocaea pomi et Trichothecium roseum. Utilisé in vitro, le chlorure de calcium seul à plus de 4 % est toléré par les douze espèces fongiques. In vivo et à basse température, le chlorure de calcium est efficace lorsqu’utilisé à 4 et 6 %. L’association de ces fongicides avec le chlorure de calcium (4 %) permet de diminuer l’intensité des lésions causées par la pourriture des pommes en conservation. Le chlorure de calcium apparaît intervenir en renforçant les liens avec les principaux sites d’action des fongicides de l’agent pathogène évalué.

Comparative Studies on the Susceptibility of Three Tubers of Dioscorea Species to Dry Rot in Anyigba, Kogi State

2019 ◽  
Vol 8 (1) ◽  
pp. 70-74
Author(s):  
Adegboyega Adeniji ◽  
Apovughaye Taiga ◽  
M S Ayodele
Keyword(s):  
Aspergillus Niger ◽  
Fungal Species ◽  
Pathogenicity Test ◽  
Rhizopus Stolonifer ◽  
Bioactive Substances ◽  
Dry Rot ◽  
Significant Difference ◽  
White Yam ◽  
Yellow Yam ◽  
Dioscorea Species

Various yam species are cultivated but white yam (Dioscorea rotundata Poir.), water yam (Dioscorea alata L.) and yellow yam (Dioscorea cayenensis Lam.) are among the most cultivated in Nigeria. The Susceptibility of three tubers of Dioscorea species (D. rotundata, D. alata and D. cayenensis) to dry rot pathogens was investigated. Isolation was made from rotted tuber tissues, followed by pathogenicity test and identification of isolates; two fungal species Aspergillus niger and Rhizopus stolonifer were isolated and identified as the major fungi causing yam tuber dry rot in the study area. There was significant difference (P<0.05) in the susceptibility of the various Dioscorea tuber species studied to rot caused by Aspergillus niger [D. rotundata (20mm), D. alata (11mm) and D. cayenensis (3.5mm)] and  Rhizopus  stolonifer [ D. rotundata (17.5mm), D. alata (10mm) and D. cayenensis (2mm)]. The phytochemical contents of the three tubers of Dioscorea species examined also varied significantly, with the bioactive substances of D. cayenensis and D. alata relatively higher when compared to D. rotundata. Therefore, this research reveals that three metabolites; Saponin, Flavonoid and Tanin constitute the major trait for resistant ability of D. cayanesis and D. alata to dry rot causing pathogen.  Therefore, it is necessary that the differences in susceptibility be considered when developing yam barns. Also, researchers should work on genetically improving the susceptible white yam (D. rotundata) which is commonly eaten by millions of Nigerians with a possibility of increasing the quantities of the deficient phytochemicals.

scholarly journals Identification and pathogenicity of Fusarium spp. associated with tuber dry rot and wilt of potato in Algeria

2021 ◽  
Author(s):  
Nadia Azil ◽  
Emil Stefańczyk ◽  
Sylwester Sobkowiak ◽  
Saliha Chihat ◽  
Houda Boureghda ◽  
...  
Keyword(s):  
Potato Tuber ◽  
Fusarium Oxysporum ◽  
Phytopathogenic Fungi ◽  
Pathogenicity Test ◽  
Fusarium Sambucinum ◽  
Fusarium Spp ◽  
Dry Rot ◽  
Potato Plants ◽  
Potato Dry Rot ◽  
Potato Wilt

AbstractFusarium is one of the most important genera of phytopathogenic fungi, causing potato wilt in the field and potato tuber dry rot during storage. The objectives of this study were to identify Fusarium species associated with both potato diseases in different growing regions in Algeria, and to assess their pathogenicity. Among the 152 isolates collected from symptomatic potato plants and tubers in different provinces in Algeria, 13 species of Fusarium and Neocosmospora were identified. Among these three species were isolated only from plants showing symptoms of Fusarium potato wilt (F. oxysporum, F. venenatum, Neocosmospora solani). Two species (F. culmorum, N. tonkinensis) and an isolate of Neocosmospora sp. were found exclusively in tubers with potato dry rot and the remaining ones (F. redolens, F. cf. tricinctum, F. sambucinum, F. cf. incarnatum-equiseti, F. nygamai, F. brachygibbosum and N. falciformis) were associated with both sample types. Fusarium sambucinum was the most frequent species (52.6% of isolates). Fusarium oxysporum and F. nygamai isolates were the most aggressive in the potato wilt pathogenicity test, and F. sambucinum isolates were the most aggressive in the potato tuber pathogenicity test. This is the first study identifying and characterizing potato dry rot and potato wilt pathogens in Algeria.

Antifungal activity of aluminium-containing salts against the development of carrot cavity spot and potato dry rot

2013 ◽  
Vol 163 (2) ◽  
pp. 311-317 ◽  
Author(s):  
E.A. Kolaei ◽  
C. Cenatus ◽  
R.J. Tweddell ◽  
T.J. Avis
Keyword(s):  
Antifungal Activity ◽  
Dry Rot ◽  
Cavity Spot ◽  
Potato Dry Rot
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