Yellow sigatoka epidemics caused by a panmictic population of Mycosphaerella musicola in Brazil

2017 ◽  
Vol 67 (2) ◽  
pp. 295-302 ◽  
Author(s):  
L. I. S. Gomes ◽  
G. W. Douhan ◽  
M. S. Lehner ◽  
L. B. J. Bibiano ◽  
E. S. G. Mizubuti
Keyword(s):  
Panmictic Population ◽  
Mycosphaerella Musicola

scholarly journals Manejo Fitosanitario de las Principales plagas del Plátano del clon Dominico – Hartón

2020 ◽  
Vol 5 (9) ◽  
pp. 204
Author(s):  
Amanda Elizabeth Bonilla-Bonilla ◽  
Juan Gabriel Chipantiza-Masabanda ◽  
Mario Francisco Játiva-Reyes
Keyword(s):  
Mycosphaerella Fijiensis ◽  
El Sistema ◽  
Mycosphaerella Musicola

El estudio se realizó en la Finca Integral Jatum Paccha, ubicada a 2 Km de la Parroquia 10 de Agosto vía a la Parroquia El Triunfo y, en la Finca Integral Unión Base, localizada a 3 Km de la cuidad de Puyo, durante  el  2017. Constituyendo el objeto de la investigación las principales plagas de Plátano, para dar respuesta al problema se propuso los siguientes objetivos: determinar las principales plagas del cultivo de Plátano, su importancia y la estrategia de Manejo fitosanitario del cultivo óptimo para resolver el problema de los daños de las plagas, utilizando la metodología del Dr. Iparraguirre et al. (1998), CIBA - GEIGI (2000) y León et al (2007). Se determinó que las Plagas más importantes fueron Mycosphaerella musicola (Leach ex Mulder.), Mycosphaerella fijiensis (Morelet),y el Mosaico del pepino (CMV); como Sistemas de Control Fertilización + Deshoje y Fertilización + Deshoje + Fungicida orgánico Timorex Gold, los más efectivos respectivamente al bajar por debajo del Umbral Económico (grado 2) el desarrollo de la enfermedad, grado medio de afectación y disminuir su distribución en el área de estudio; así como, obtener los mejores índices cualitativos de cosecha del cultivo del plátano, destacándose con respecto a la floración el Sistema Fertilización + Deshoje.

LEAF SPOT OF BANANAS CAUSED BY MYCOSPHAERELLA MUSICOLA: ASSOCIATED ASCOMYCETOUS FUNGI

1963 ◽  
Vol 41 (10) ◽  
pp. 1481-1485 ◽  
Author(s):  
R. H. Stover
Keyword(s):  
Leaf Spot ◽  
Leaf Tissue ◽  
Leaf Spots ◽  
Mycosphaerella Musicola ◽  
Banana Leaf

In addition to perithecia, spermagonia, and sporodochia of Mycosphaerella nmsicola Leach (Cercospora musac Zimm.), perithecia of M. minima Stahel, Leptosphaeria sp., Micronectridla sp. and Didymella sp. are present in banana leaf spots in Honduras. All of these fungi discharge ascospores from both surfaces of wet leaf spots. Discharges of M. musicola and Didymella are most abundant from June through December whereas ascospores of Micronectriella are abundant from January to June. Ascospores of M. minima and especially Leptosphaeria are abundant at all times. The two-celled ascospores of M. musicola, M. minima, and Didymella are readily identified by size, shape, and type of germination. M. musicola perithecia can be readily distinguished in non-sectioned lactophenol-cleared leaf tissue by the dark thick walls of the ostiole and periderm. M. minima and Micronectriella can produce ascospores in siugle-ascospore cultures. The latter also produces Fusarium macroconidia. Micronectriella sp. is present in young healthy leaves and is considered a banana leaf inhabitant. Perithecia of all species are more abundant in areas of mass leaf spot infection than in single, scattered spots.

Leaf spot of bananas caused by Mycosphaerella musicola: action of oil on the life cycle of the pathogen

1968 ◽  
Vol 46 (12) ◽  
pp. 1495-1505 ◽  
Author(s):  
R. H. Stover ◽  
J. D. Dickson
Keyword(s):  
Incubation Period ◽  
Leaf Spot ◽  
Germ Tube ◽  
Tube Growth ◽  
Disease Development ◽  
Resistant Varieties ◽  
Mycosphaerella Musicola ◽  
Appressoria Formation ◽  
Ascospore Production ◽  
Germ Tube Growth

Oil spray reduced germination, germ tube growth, and appressoria formation by spores of Mycosphaerella musicola under field conditions for periods varying from 2 days to 2 weeks. Inhibition occurred only when spores were on the same leaf surface to which oil was applied. Appressoria formation and germ tube growth were reduced up to 33% and 25%, respectively. Conidia and ascospore production and dissemination were not adversely affected by oil spray. However, there were fewer sporodochia and perithecia in spots that were slow to develop as a result of oil spray. Oil application up to 2 weeks before or after infection increased the incubation period and the generation time, and reduced the number of spots. Oil is effective in retarding spot development when applied either before streaks appear or at the yellow streak stage of disease development. Oil, when applied during the incubation period or to yellow streaks, causes a variable amount of reduction in spotting and in only a minority of cases is disease development stopped completely. Therefore, leaf spot can build up on oil-sprayed plants when inoculum is abundant and weather favorable. The behavior of the pathogen on oil-sprayed susceptible banana plants is similar to that on partially resistant varieties.

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