scholarly journals Effect of salinity on biology of Saprolegnia ferax and Pythium ultimum

2014 ◽  
Vol 28 (1) ◽  
pp. 39-43 ◽  
Author(s):  
Samy K. Hassan ◽  
E. M. Fadl-Allah
Keyword(s):  
Pythium Ultimum ◽  
Saprolegnia Ferax

<i>Saprolegnia ferax</i> and <i>Pythium ultimum</i> were cultivated on the leaves of <i>Bromus catharicus</i>. Different concentrations of NaCl were used in the medium. <i>S. ferax</i> appears to be more tolerant to salinity than <i>P. ultimum</i> in CMC-ase production and the ability for growth.

Inhibition of Fungal Growth by Macerated Plant Tissues in a Closed Environment

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 476e-476
Author(s):  
Craig S. Charron ◽  
Catherine O. Chardonnet ◽  
Carl E. Sams
Keyword(s):  
Radial Growth ◽  
Fungal Pathogens ◽  
Solid Phase ◽  
Indian Mustard ◽  
Fungal Growth ◽  
Allyl Isothiocyanate ◽  
Pythium Ultimum ◽  
Alternative Methods ◽  
Gas Chromatography Mass Spectrometry ◽  
Clean Air

The U.S. Clean Air Act bans the use of methyl bromide after 2001. Consequently, the development of alternative methods for control of soilborne pathogens is imperative. One alternative is to exploit the pesticidal properties of macerated tissues of Brassica spp. This study tested the potential of several Brassica spp. for control of fungal pathogens. Pythium ultimum Trow or Rhizoctonia solani Kühn plugs on potato-dextrose agar on petri dishes were sealed in 500-ml glass jars (at 22 °C) containing macerated leaves (10 g) from one of six Brassica spp. Radial growth was measured 24, 48, and 72 h after inoculation. Indian mustard (B. juncea) was the most suppressive, followed by `Florida Broadleaf' mustard (B. juncea). Volatile compounds in the jars were sampled with a solid-phase microextraction device (SPME) and identified by gas chromatography-mass spectrometry (GC-MS). Allyl isothiocyanate (AITC) comprised over 90% of the total volatiles measured from Indian mustard and `Florida Broadleaf' mustard. Isothiocyanates were detected in jars with all plants except broccoli. (Z)-3-hexenyl acetate was emitted by all plants and was the predominant volatile of `Premium Crop' broccoli (B. oleracea L. var. italica), `Michihili Jade Pagoda' Chinese cabbage (B. pekinensis), `Charmant' cabbage (B. oleracea L. var. capitata), and `Blue Scotch Curled' kale (B. oleracea L. var. viridis). To assess the influence of AITC on radial growth of P. ultimum and R. solani, AITC was added to jars to give headspace concentrations of 0.10, 0.20, and 0.30 mg·L–1 (mass of AITC per volume of headspace). Growth of both fungi was inhibited by 0.10 mg·L–1 AITC. 0.20 mg·L–1 AITC was fungicidal to P. ultimum although the highest AITC level tested (0.30 mg·L–1) did not terminate R. solani growth. These results indicate that residues from some Brassica spp. may be a viable part of a soilborne pest control strategy.

Some new records of lower aquatic fungi from western Maharashtra, Maharashtra State, India.

2016 ◽  
Vol 5 (02) ◽  
pp. 4846
Author(s):  
Vaishali Shinde* ◽  
A. B. Pawar
Keyword(s):  
New Records ◽  
Aquatic Fungi ◽  
Saprolegnia Ferax

Present study deals with the study of some lower aquatic fungi different regions of Maharashtra viz., Acaulopage dichotoma Drechsler belong to family Zoophagacea (Class- Zygomycetes) while Achlya oblongata de Bary, Brevilegnia megasperma Harvey, Saprolegnia ferax (Gruith) Thuret and Saprolegnia subterranae (Dissman) Seymour belongs to family Saprolegniaceae (Class - Oomycetes). All these are new records of aquatic fungi from the Maharashtra state.

scholarly journals Using Commercial Compost as Control Measures against Cucumber Root-Rot Disease

2013 ◽  
Vol 2013 ◽  
pp. 1-13 ◽  
Author(s):  
Kamel Kamal Sabet ◽  
Magdy Mohamed Saber ◽  
Mohamed Adel-Aziz El-Naggar ◽  
Nehal Samy El-Mougy ◽  
Hatem Mohamed El-Deeb ◽  
...  
Keyword(s):  
Root Rot ◽  
Control Measure ◽  
Disease Incidence ◽  
Pathogenic Fungi ◽  
Pythium Ultimum ◽  
Control Measures ◽  
Infested Soil ◽  
Fungal Isolates ◽  
Cucumber Root

Five commercial composts were evaluated to suppress the root-rot pathogens (Fusarium solani (Mart.) App. and Wr, Pythium ultimum Trow, Rhizoctonia solani Kuhn, and Sclerotium rolfsii Sacc.) of cucumber plants under in vitro and greenhouse conditions. In vitro tests showed that all tested unautoclaved and unfiltrated composts water extracts (CWEs) had inhibitor effect against pathogenic fungi, compared to autoclaved and filtrated ones. Also, the inhibitor effects of 40 bacteria and 15 fungi isolated from composts were tested against the mycelial growth of cucumber root-rot pathogens. Twenty two bacteria and twelve fungal isolates had antagonistic effect against root-rot pathogens. The antagonistic fungal isolates were identified as 6 isolates belong to the genus Aspergillus spp., 5 isolates belong to the genus Penicillium spp. and one isolate belong to the genus Chaetomium spp. Under greenhouse conditions, the obtained results in pot experiment using artificial infested soil with cucumber root-rot pathogens showed that the compost amended soil reduced the percentage of disease incidence, pathogenic fungi population, and improved the cucumber vegetative parameters as shoot length, root length, fresh weight, and dry weight. These results suggested that composts are consequently considered as control measure against cucumber root-rot pathogens.

Chloramphenicol inhibition of Pythium ultimum and Rhodotorula glutinis

1968 ◽  
Vol 60 (3) ◽  
pp. 262-274 ◽  
Author(s):  
D. G. Smith ◽  
R. Marchant
Keyword(s):  
Rhodotorula Glutinis ◽  
Pythium Ultimum

scholarly journals Transcriptome changes specifically associated with apple (Malus domestica) root defense response during Pythium ultimum infection

2016 ◽  
Vol 94 ◽  
pp. 16-26 ◽  
Author(s):  
Sungbong Shin ◽  
Ping Zheng ◽  
Gennaro Fazio ◽  
Mark Mazzola ◽  
Dorrie Main ◽  
...  
Keyword(s):  
Malus Domestica ◽  
Defense Response ◽  
Pythium Ultimum

Some Sporangial Variations in Saprolegnia ferax

Mycologia ◽  
1937 ◽  
Vol 29 (2) ◽  
pp. 226
Author(s):  
Fred T. Wolf
Keyword(s):  
Saprolegnia Ferax
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