diálogos ELE

Metarhizium anisopliae is commercially produced in solid substrates, but this type .. virulencia de conidio de hongo entomopatógeno Metarhizium anisopliae . Caracterización genética de aislados de Metarhizium anisopliae (Metchniko) la diversidad genética y patogenicidad de las poblaciones nativas del hongo. El. Genetic characterisation of Metarhizium anisopliae (Metchnikoff) Sorokin sobre la diversidad genética y patogenicidad de las poblaciones nativas del hongo.

Author: Tomi Zologore
Country: Laos
Language: English (Spanish)
Genre: Automotive
Published (Last): 16 July 2005
Pages: 353
PDF File Size: 19.39 Mb
ePub File Size: 13.4 Mb
ISBN: 161-2-97446-150-5
Downloads: 58679
Price: Free* [*Free Regsitration Required]
Uploader: Taramar

At least two genotypes of M. Samples were collected from the fields of 33 farmers two fields with and 31 fields without the use of M. Evaluation of entomopathogenic fungus Metarhizium anisopliae against soil- dwelling stages of cabbage maggot Diptera: All the fungal isolates gave rise to a bp product, with the exception of the isolate YR for which the amplicon was bp in length and the isolate JC with a bp amplicon.

The persistence and the effect of this introduced isolate on the genetic diversity and pathogenicity of the native fungus population are unknown. The higher frequency of M. Some of the native M.

Metarhizium anisopliae Metchnikoff Sorokin Relative growth of the colonies RG was calculated from the data for each strain, fungicide, and concentration. Springer, Dordrecht, The Netherlands. Metarhizium anisopliae Cockroach killed by M. In conclusion, a high diversity of M.

It is worth mentioning that the soil in the sugarcane fields is even wetter in the western area of the region, where seven M. The plating procedure was carried out under sterile conditions in a laminar flow chamber. When these mitotic asexual spores called conidia of the fungus come into contact anisoppiae the body of an insect host, they germinate and the hyphae that emerge penetrate the cuticle.

Historically, sugarcane fields in this area have suffered more damage from this pest given the close proximity to pastures, honho some sugarcane farmers have used M. The Spearman’s rank correlation test Minitab Inc. Plant protection products acting on EF can vary as a function of the species and EF structure type, chemical nature of the product, and doses used. Evidence for the predisposition of fungicide- resistant isolates of Venturia inaequalis to a preferential selection for resistance to other fungicides.


Anosopliae procedures mentioned above for G. In order to determine the phylogenetic relationships within the M. Furthermore, it is not possible to forecast isolate pathogenicity with respect to their degree of genetic similarity. Two of the isolates obtained in were genetically similar to the commercial strain used in Three were collected in and 11 inrepresenting 9. Effect of fenhexamid on the development of Botrytis cinerea.

Producción y manejo del hongo Metarhizium anisopliae (Metch) sor

Some studies have indicated that M. On average, each farmer had 6 ha of sugarcane crops. The rest of the isolates were incompatible with all the evaluated concentrations Figures 1 H and 2 H.

These results were not analysed in this study. Ethidium bromide gel staining was applied, and the DNA fragments were observed under UV light and photographed.

In the dendrogram generated from the restriction analysis Figure 3two metathizium clades grouped together the reference strain of M. Effect of fungicides on conidia germination and germination tube length Anisopilae was possible to calculate the value of IC50 only for all the isolates incubated with benomyl, and only for Qu-Mb in the case of fludioxinil. At the end of this incubation period, fungal anisipliae obtained was employed to evaluate the relative growth of the colonies.

Journal of General Microbiology The dendrogram formed three subgroups with two isolates each and four subgroups with only one isolate each Figure 5. Variations in band intensity were not considered as differences. There would therefore be arguments to point out that a lack of energy can affect vegetative development in the studied isolates. This fungus is, therefore, locked in an evolutionary battle to overcome these defenses, which has led to a large number of isolates or strains that are adapted to certain groups of insects.

Producción y manejo del hongo Metarhizium anisopliae (Metch) sor [1998]

It is most frequently applied to berry fruit crops, where fungicides are also used for disease control. Clavicipitaceae Parasitic fungi Fungi described in The other eight M.


In total, 10 isolates were morphologically identified as M. This variability could also explain sensitivity to synthetic chemical products Alves et al. A Guide to Methods and Applications. This percentage is even lower considering that three isolates were collected in and seven in Similarly, a response curve and associated equation were obtained for each isolate and fungicide. Addition of the ICL inhibitor 3-nitroproprionate delayed conidial germination and inhibited appressorium formation.

Journal of Invertebrate Pathology. Azoxystrobin belongs to the strobilurin chemical group and accomplishes its fungal action by inhibiting the mitochondrial respiration of fungi, blocking electron transport between cytochrome b and cytochrome c 1 where ubiquinol coenzyme Q is oxidized, directly interfering with the oxidative phosphorylation process since there would be no more available energy in the mitochondria to synthesize ATP adenosine triphosphateand impeding spore germination and pathogen development Ypema and Gold, ; Agrios, ; Kanetis et al.

Transactions of the British Mycological Society We especially thank the sugarcane producers of the Los Rios region of Tabasco for facilitating access to their sugarcane fields. However, Alves et al. Effect of fungicides and insecticides applied during planning of sugarcane on viability of Metarhizium anisopliae and its efficacy against white grubs. These differences may be explained by the environmental conditions that predominate in both studies temperate region vs tropical regionand also because Inglis et al.

The lower presence of B. It is a mitosporic fungus with asexual reproductionwhich was formerly classified in the form class Hyphomycetes of the phylum Deuteromycota also often called Fungi Imperfecti.

The gels were stained with ethidium bromide and photographed on a UV Cole Palmer transilluminator.