Increased populations of deleterious fluorescent pseudomonads colonizing rhizomes of leatherleaf fern (Rumohra adiantiformis) and expression of symptoms of fern distortion syndrome after application of Benlate systemic fungicide

2012 ◽  
Vol 61 ◽  
pp. 236-246 ◽  
Author(s):  
Joseph W. Kloepper ◽  
Chia-Hui Hu ◽  
Marleny Burkett-Cadena ◽  
Ke Liu ◽  
Jia Xu ◽  
...  
Keyword(s):  
Fluorescent Pseudomonads ◽  
Systemic Fungicide ◽  
Rumohra Adiantiformis

scholarly journals Fern Distortion Syndrome of Leatherleaf Fern in Costa Rica: Symptoms, Incidence, and Severity

Plant Disease ◽  
2010 ◽  
Vol 94 (8) ◽  
pp. 940-951 ◽  
Author(s):  
J. W. Kloepper ◽  
F. Saborío ◽  
E. Bustamante ◽  
J. E. Polston ◽  
E. Sánchez ◽  
...  
Keyword(s):  
Tissue Culture ◽  
Costa Rica ◽  
Rating Scale ◽  
Fluorescent Pseudomonads ◽  
Full Description ◽  
Root Mass ◽  
New Disease ◽  
Rumohra Adiantiformis

A syndrome has been recognized on leatherleaf fern (Rumohra adiantiformis) in Costa Rica for many years that causes widespread damage but has not been described in the literature. A full description of the syndrome, termed fern distortion syndrome (FDS), is reported here, along with evidence that FDS is a new disease and that it is associated with endophytic fluorescent pseudomonads but not with any other major groups of pathogens or pests. The main aboveground symptoms of FDS are twisting and distortions of fronds, which make the fronds unmarketable. In advanced cases of FDS, fronds are often thickened, new frond growth ceases or slows dramatically, and uneven sporulation is apparent on the underside of fronds. Symptoms of FDS belowground are reduced diameter of rhizomes and reduced overall root mass. The incidence of FDS in Costa Rica was typically over 80%, and severity typically ranged from 1.26 to 2.48 using a 0 to 3 rating scale in fields propagated vegetatively with rhizomes from fields with FDS. In contrast, in three fields planted 1.5 to 4 years previously with rhizomes derived from tissue culture, incidence and severity were markedly lower: 23 to 34% and 0.24 to 0.36, respectively. Paired sampling of symptomatic and asymptomatic plants revealed significantly greater populations of fluorescent pseudomonads inside rhizomes of symptomatic plants.

Phylogenetic analysis of alkaline proteinase producing fluorescent pseudomonads associated with green gram (Vigna radiata L.) rhizosphere

2012 ◽  
Vol 57 (2) ◽  
pp. 129-137 ◽  
Author(s):  
Rupak K. Sarma ◽  
Rajal Debnath ◽  
Ratul Saikia ◽  
Pratap J. Handique ◽  
Tarun C. Bora
Keyword(s):  
Phylogenetic Analysis ◽  
Vigna Radiata ◽  
Fluorescent Pseudomonads ◽  
Green Gram ◽  
Alkaline Proteinase

The Metabolism of the Systemic Fungicide Carboxin (Vitavax) by Rhizopus japonicus

1972 ◽  
Vol 2 (1) ◽  
pp. 37-43 ◽  
Author(s):  
P. R. Wallnöfer ◽  
M. Königer ◽  
S. Safe ◽  
O. Hutzinger
Keyword(s):  
Systemic Fungicide

Efficacy of Different Level of Systemic Fungicides on Management of Rice Blast at Baitadi, Nepal

2020 ◽  
Vol 7 ◽  
pp. 33-42
Author(s):  
Ashok Acharya ◽  
Prabin Ghimire ◽  
Dhurba Raj Joshi ◽  
Kishor Shrestha ◽  
Govinda Sijapati ◽  
...  
Keyword(s):  
Disease Severity ◽  
Rice Blast ◽  
Fungal Pathogens ◽  
Block Design ◽  
Rice Variety ◽  
Disease Suppression ◽  
Systemic Fungicide ◽  
Disease Development ◽  
Systemic Fungicides ◽  
Different Levels

Rice blast (Pyriculariaoryzae Cavara) is one of the most devastating diseases affecting the rice crop in across the world. Systemic fungicides are used for the suppression of blast diseases caused by fungal pathogens. Propiconazole and Carbendazim are commercial chemical control products available in markets for the control of the fungal pathogen. An experiment was conducted to examine the effectiveness of systemic fungicide on suppression of rice blast incidence in farmers' field during wet seasons in 2016. The treatments consisted of the use of different levels of propiconazole and Carbendazim on ‘Rato Basmati’ a landrace rice variety. The experiments were arranged in a randomized complete block design with three replications. The disease was scored according to the standard scale developed by the International Rice Research Institute (IRRI). Disease severity and Area under Disease Progressive curve (AUDPC) was computed based on that scale score. Propiconazole and Carbendazim at different levels reduce disease development than no treatment (control). But its efficacy was not consistent. The magnitude of disease suppression by Propiconazole was high as compared to Carbendazim. The application of propiconazole at the rate of 1.5 ml effectively reduced disease severity and AUDPC at different dates. So propiconazole at the rate of 1.5 ml thrice at weekly intervals is effective to reduce the disease development

scholarly journals Criptógamos do Parque Estadual das Fontes do Ipiranga, São Paulo, SP, Brasil: Pteridophyta: 7. Dryopteridaceae e 11. Lomariopsidaceae

Hoehnea ◽  
2012 ◽  
Vol 39 (4) ◽  
pp. 555-564 ◽  
Author(s):  
Regina Yoshie Hirai ◽  
Jefferson Prado
Keyword(s):  
Sao Paulo ◽  
São Paulo ◽  
Rumohra Adiantiformis

Neste trabalho são apresentados os dados referentes ao levantamento florístico das famílias Dryopteridaceae e Lomariopsidaceae no Parque Estadual das Fontes do Ipiranga (PEFI). No total foram encontrados na área cinco gêneros e nove espécies, sendo que Dryopteridaceae está representada por dois gêneros (Polybotrya e Rumohra) e quatro espécies: Polybotrya cylindrica Kaulf., P. semipinnata Fée, P. speciosa Schott e Rumohra adiantiformis (G. Forst.) Ching, enquanto Lomariopsidaceae está representada por três gêneros (Elaphoglossum, Mickelia e Lomariopsis) e cinco espécies: Elaphoglossum ornatum (Mett. ex Kuhn) Christ, E. nigrescens (Hook.) T. Moore ex Diels, E. macrophyllum (Mett. ex Kuhn) Christ, Mickelia scandens (Raddi) R.C. Moran et al. e Lomariopsis marginata (Schrad.) Kuhn. São apresentadas chaves para identificação dos gêneros e espécies, bem como descrições, distribuição geográfica, comentários e ilustrações para alguns dos táxons estudados.

Different reactions of wheat mutants to a systemic fungicide

1971 ◽  
Vol 58 (8) ◽  
pp. 415-416 ◽  
Author(s):  
K. A. Siddiqui ◽  
V. Haahr
Keyword(s):  
Systemic Fungicide

An evaluation of potential seed treatments to control Fusarium solani f.sp. phaseoli, the cause of foot and root rot of Phaseolus vulgaris

1977 ◽  
Vol 89 (1) ◽  
pp. 235-238 ◽  
Author(s):  
P. E. Russell ◽  
A. E. A. Mussa
Keyword(s):  
Phaseolus Vulgaris ◽  
Fusarium Solani ◽  
Root Rot ◽  
Similar Pattern ◽  
Fungal Growth ◽  
Systemic Fungicide ◽  
Product Concentration ◽  
Low Concentrations ◽  
High Concentrations

SummaryTwo systemic fungicides, benomyl and thiabendazole, were more active than the non-systemic fungicide Drazoxolon in inhibiting fungal growth in vitro. A similar pattern was obtained in glasshouse trials with benomyl and thiabendazole giving adequate protection at low concentrations while Drazoxolon was ineffective unless applied at 50% the commercial product concentration. A field trial using thiabendazole, Drazoxolon and a mixture of benomyl and thiram confirmed the glasshouse results.Some phytotoxicity was noticed with high concentrations of both benomyl and thiabendazole, but satisfactory disease control was achieved using fungicide concentrations which did not induce phytotoxicity.

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