Effect of inoculum density and quantitative PCR-based detection of Rhizoctonia solani AG-2-1 and Fusarium avenaceum on canola

2014 ◽  
Vol 59 ◽  
pp. 71-77 ◽  
Author(s):  
Qixing Zhou ◽  
Yongyan Chen ◽  
Yalong Yang ◽  
Hafiz U. Ahmed ◽  
Sheau-Fang Hwang ◽  
...  
Keyword(s):  
Rhizoctonia Solani ◽  
Quantitative Pcr ◽  
Inoculum Density ◽  
Fusarium Avenaceum

Effects of seed treatments and inoculum density of Fusarium avenaceum and Rhizoctonia solani on seedling blight and root rot of faba bean

2014 ◽  
Vol 94 (4) ◽  
pp. 693-700 ◽  
Author(s):  
K. F. Chang ◽  
R. L. Conner ◽  
S. F. Hwang ◽  
H. U. Ahmed ◽  
D. L. McLaren ◽  
...  
Keyword(s):  
Rhizoctonia Solani ◽  
Seed Yield ◽  
Faba Bean ◽  
Root Rot ◽  
Seed Treatment ◽  
Seedling Emergence ◽  
Inoculum Density ◽  
Fusarium Avenaceum ◽  
Seedling Blight ◽  
Seed Treatments

Chang, K. F., Conner, R. L., Hwang, S. F., Ahmed, H. U., McLaren, D. L., Gossen, B. D. and Turnbull, G. D. 2014. Effects of seed treatments and inoculum density of Fusarium avenaceum and Rhizoctonia solani on seedling blight and root rot of faba bean. Can. J. Plant Sci. 94: 693–700. Production of faba bean cultivars with tannin-free seed on the Canadian prairies has potential for use in human food and as a feedstock for livestock and aquaculture. However, root rot is a major constraint to production. The effects of fungicide seed treatments on root rot caused by Fusarium avenaceum and Rhizoctonia solani, and the effect of inoculum density on seedling emergence, nodulation, root rot severity and yield of faba bean were examined across 12 station years from 2009 to 2011 at sites in Manitoba and Alberta. Fusarium avenaceum reduced seedling emergence more than R.solani, but both pathogens had a similar impact on seed yield. The effects of inoculum density and seed treatment were generally significant for seedling emergence, root rot severity and seed yield for both pathogens. The interaction effects of inoculum density×seed treatment for F.avenaceum and R.solani were only significant for seed yield and seedling emergence. Seedling emergence and seed yield declined with increasing inoculum level for both F. avenaceum and R.solani. Fungicidal seed treatments with Apron Maxx (fludioxonil+metalaxyl) and Vitaflo 280 (carbathiin+thiram) consistently improved emergence and seed yield in trials inoculated with F.avenaceum or R.solani. This study demonstrated that seed treatment to manage root rot of faba bean is warranted.

Relationship of Rhizoctonia solani inoculum density to incidence of hypocotyl rot and damping-off in dry beans

1989 ◽  
Vol 35 (12) ◽  
pp. 1132-1140 ◽  
Author(s):  
A. J. L. Phillips
Keyword(s):  
Phaseolus Vulgaris ◽  
Linear Regression ◽  
Rhizoctonia Solani ◽  
Disease Incidence ◽  
Inoculum Density ◽  
Damping Off ◽  
Dry Beans ◽  
Site Model ◽  
Relationship Of

The effect of inoculum density on preemergence disease incidence was described by linear regression. Variations in virulence among 10 isolates formed a continuum. The effect of inoculum density on hypocotyl disease incidence was described by a limiting site model and variations in virulence among the isolates also formed a continuum. The ability of an isolate to cause preemergence disease was not necessarily related to its ability to cause hypocotyl disease. Both saprophytic colonization and preemergence infection arose from propagules in the spermosphere, while depending on the isolate, infection of hypocotyls was from propagules in either the rhizosphere or the rhizoplane. The observed number of hypocotyl lesions was greater than that estimated from the percentage of plants infected. This effect was more pronounced when seeds were sown at 4 than at 1 cm depth.Key words: beans, epidemiology, Phaseolus vulgaris, Rhizoctonia solani.

scholarly journals Evaluation of health state and growth of Gypsophila paniculata L. and Gypsophila repens L. groving in soil in variable fertilization

2013 ◽  
Vol 55 (1) ◽  
pp. 367-376 ◽  
Author(s):  
Maria Warner ◽  
Wojciech Antkowiak
Keyword(s):  
Plant Growth ◽  
Rhizoctonia Solani ◽  
Fusarium Oxysporum ◽  
Fusarium Culmorum ◽  
Fusarium Avenaceum ◽  
Health State ◽  
Gypsophila Paniculata ◽  
Npk Fertilization

The influence of NPK fertilization on plant growth and roots yield of <i>Gypsophila paniculata</i> and <i>Gypsophila repens</i> was investigated. The nutrients were applied in different proportions. The health state of <i>Gypsophila</i> was also analyzed. The pathogens isolated from plants showing the diseases symptoms represented eight species: <i>Alternaria dianthicola</i> Neergaard; <i>Fusarium avenaceum</i> (Fr.) Sacc.; <i>Fusarium culmorum</i> (W. G.Smith) Sacc.; <i>F.equiseti</i> (Cola) Sacc.; <i>F.oxysporum</i> Schlecht., Snyder et Hansen; <i>F.sambucinum</i> Fuck; <i>Phytophthora</i> sp. de Bary; <i>Rhizoctonia solani</i> K. Fusarium oxysporum and other species of fungi were isolated from <i>Gypsophila paniculata</i>, whilst from Gypsophila repens only <i>Fusarium oxysporum</i> was obtained.

scholarly journals Rhizoctonia solani damping-off on spring turnip rape and spring rape (Brassica spp.) in Finland

1984 ◽  
Vol 56 (2) ◽  
pp. 143-154 ◽  
Author(s):  
Risto Tahvonen ◽  
Jukka Hollo ◽  
Asko Hannukkala
Keyword(s):  
Rhizoctonia Solani ◽  
Crop Rotation ◽  
Oilseed Rape ◽  
Fusarium Avenaceum ◽  
Damping Off ◽  
Turnip Rape ◽  
Brassica Spp ◽  
Pathogenicity Tests ◽  
Spring Rape

Damping-off occurred in 90 % of the spring oilseed rape fields surveyed in 1981—1982. On the average, 10 % of the plants were infected with damping-off.6 % of the fields were severely infected (> 30 % of the plants affected) by damping-off and 38 % were uninfected or only slightly infected ( ≤ 5% of the plants affected). The incidence of damping-off was higher in those fields which had been under oilseed rape in earlier years. Ina crop rotation experiment, the amount of damping-off increased from 2 % to 20 %, and finally to 38 %, depending upon whether turnip rape had been grown on the same part of the field once, twice or three times. Crops other than Cruciferous ones were grown for 1 or 3 years between the turnip rape crops. Rhizoctonia solani Kühn was isolated from 76 % of the affected plants. The R. solani isolates produced severe damping-off on rape and turnip rape in pathogenicity tests. R. solani isolates from barley, potato and lettuce brought about only mild cases of damping-off, or else only a decrease in the growth of the plants. Fusarium avenaceum Sacc. was the only other isolated fungus which was pathogenic.

scholarly journals Susceptibility of different parsley cultivars to infestation by pathogenic fungi

2012 ◽  
Vol 58 (2) ◽  
pp. 163-170 ◽  
Author(s):  
Jacek Nawrocki
Keyword(s):  
Rhizoctonia Solani ◽  
Fusarium Oxysporum ◽  
Field Experiments ◽  
Pathogenic Fungi ◽  
Fusarium Avenaceum ◽  
Damping Off ◽  
Stemphylium Botryosum ◽  
Cylindrocarpon Destructans ◽  
Second Year

The experiments were carried out in the years 2002 and 2003 on parsley seeds of 6 cultivars: Alba, Berlińska, Cukrowa, Kinga, Lenka, and Vistula. Mycological analysis of parsley seeds showed that the most common inhabitans were fungi from genus <i>Alternaria</i> (mainly <i>A. alternata</i> and <i>A. radicina</i>) and <i>Fusarium</i>, especially <i>F. avenaceum</i> and <i>F. oxysporum</i>. During the glasshouse investigations fungi <i>Alternaria radicina</i>, <i>A. alternata</i> and <i>Fusarium avenaceum</i> were the main reason for parsley damping-off. The highest number of infected seedlings was observed for Berlińska and Kinga, because in both years of experiments these cultivars had the lowest number of healthy seedlings. The highest number of healthy seedlings had cultivars Alba and Lenka, especially in the second year of experiments. In the field experiments not only fungi from genus <i>Alternaria</i> and <i>Fusarium</i> were the most often isolated from diseased parsley seedlings. <i>Fusarium oxysporum</i> was more often isolated from diseased field seedlings than from glasshouse parsley seedlings. Other fungies isolated often from parsley seedlings cultivated in the field were: <i>Pythium</i> spp., <i>Rhizoctonia solani</i>, <i>Cylindrocarpon destructans</i> and <i>Stemphylium botryosum</i>.

scholarly journals Fungal diseases of chickpea (Cicer arietinum L.) cultivated in the south region of Poland

2017 ◽  
Vol 38 (SI 2 - 6th Conf EFPP 2002) ◽  
pp. 332-335
Author(s):  
S. Mazur ◽  
J. Nawrocki ◽  
J. Kućmierz
Keyword(s):  
Rhizoctonia Solani ◽  
Botrytis Cinerea ◽  
Cicer Arietinum ◽  
Weather Conditions ◽  
Fusarium Avenaceum ◽  
First Year ◽  
Cicer Arietinum L ◽  
Genus Fusarium ◽  
Alternaria Sp ◽  
Second Year

The investigations carried out in the last years showed that weather conditions were conductive to growth of chickpea (Cicer arietinum L.) in Poland. Our experiments started since 2000 on two cultivars Myles and Sanford. Evans replaced cv. Sanford in second year. The results pointed to the cv. Myles as generally healthiest and the percentage of infested plants was 3.2% in the first year and 0.92% in the next year. The experiment showed that the most important threats for plants during vegetation season were fungi from the genus Fusarium and Rhizoctonia solani, isolated most often from roots. The basal parts of the stems affected mainly Alternaria genus. Botrytis cinerea, Fusarium avenaceum and Alternaria sp. attack most frequently pods and seeds.

scholarly journals Effects of Fusarium avenaceum and Rhizoctonia solani on the growth of soybean in saline soils

2019 ◽  
Vol 99 (2) ◽  
pp. 128-137 ◽  
Author(s):  
K.F. Chang ◽  
S.F. Hwang ◽  
R.L. Conner ◽  
H.U. Ahmed ◽  
Q. Zhou ◽  
...  
Keyword(s):  
Rhizoctonia Solani ◽  
Root Rot ◽  
Saline Soil ◽  
Seedling Emergence ◽  
Fusarium Avenaceum ◽  
Saline Soils ◽  
Soil Electrical Conductivity ◽  
Seedling Blight ◽  
Canadian Prairies ◽  
Short Season

Soybean (Glycine max) acreage on the Canadian Prairies has increased rapidly in recent years. Production has expanded into semiarid regions where irrigation and drainage problems often result in the accumulation of salts in the soil. Fusarium avenaceum and Rhizoctonia solani are the two dominant pathogens in the disease complex that cause root rot and seedling blight of legume crops on the Canadian Prairies. The effects of F. avenaceum or R. solani in combination with soil salinity on soybean root rot were evaluated under greenhouse and mini-plot conditions. As expected, inoculation with F. avenaceum or R. solani consistently reduced seedling emergence and increased root rot severity in soybean. At high soil electrical conductivity values and inoculum densities, seedling emergence decreased and root rot severity increased in soybean in both trials with F. avenaceum and R. solani. Twenty short-season soybean cultivars that were well suited for production in Alberta were evaluated for their reactions to inoculation with F. avenaceum or R. solani in a saline soil (21.1 dS m−1). High seedling emergence was observed for cultivars 900Y61, P002T04R, 900Y01, TH27005RR, P001T34R, and 900Y81 in the non-inoculated control, for P002T04R and 900Y61 in the F. avenaceum treatment, and for 900Y61, 900Y81, and 900Y71 in the R. solani treatment. Root rot severity was low for cultivars NSC Portage and 900Y61 in the non-inoculated control and P002T004R in the F. avenaceum treatment. The cultivar 900Y61 also consistently had lower disease severity over the trials in the mini-plot test.

Sign in / Sign up

Export Citation Format

Share Document