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Effects of sublater rates of dazomet and metam- sodium applied under low- perme...
Aiello, Dalia; Vitale, Alessandro; Alfenas, Rafael F.; Alfenas, Acelino C.; Cirvilleri, Gabriella; Polizzi, GiancarloInfested soil is the primary inoculum source for Calonectria spp. for initiating disease in ornamental and forestry crops. The effects of dazomet and metam-sodium on survival of microsclerotia of 28 isolates belonging to 19 Calonectria spp. were evaluated in this study under nursery conditions. Two experiments with exotic Calonectria spp. in plastic containers in a greenhouse and three trials with endemic speci...
A new species of Calonectria causing rot on ripe strawberry fruit in Brazil
Zambolim, Laércio; Lopes, Ueder P.; Pereira, Olinto L.; Alfenas, Rafael F.; Crous, Pedro W.; Costa, HélcioA major problem in the strawberry production chain is the occurrence of fruit rot caused by fungi, thus, accurate identification of the pathogens associated with these rots is important for suitable management of diseases. During an assessment of postharvest diseases of strawberry plants, a rot caused by Calonectria was found. The surface of the infected fruits showed a slight leakage of liquid and the presence...
Microsatellite analysis indicates that Puccinia psidii in Australia is mutating...
Machado, Patrícia da S.; Alfenas, Acelino C.; Alfenas, Rafael F.; Mohammed, Caroline L.; Glen, MoragPuccinia psidii is considered a biosecurity threat in Australia because of its broad host range that includes many species of Myrtaceae which dominate Australian ecosystems. Since it was first reported in this country, in April 2010, there has been little information about the population structure of the pathogen. In this study, six microsatellite loci were analysed to determine the genetic relationship among r...
Optimization of Endoglucanase and Xylanase activities from fusarium verticillio...
Almeida, Maíra N. de; Guimarães, Valéria M.; Falkoski, Daniel L.; Paes, Guilherme B. T.; Ribeiro Jr., José Ivo; Visser, Evan M.; Alfenas, Rafael F.Enzymatic hydrolysis is an important but expensive step in the production of ethanol from biomass. Thus, the production of efficient enzymatic cocktails is of great interest for this biotechnological application. The production of endoglucanase and xylanase activites from F. verticillioides were optimized in a factorial design (25) followed by a CCDR design. Endoglucanase and xylanase activities increased from ...
A new species of Calonectria causing leaf blight and cutting rot of three fores...
Alfenas, Rafael F.; Pereira, Olinto L.; Jorge, Vanessa L.; Crous, Pedro W.; Alfenas, Acelino C.Several species of Calonectria cause diseases on a wide range of forest tree species that are propagated either via seedlings or rooted cuttings. In nurseries these fungi cause damping-off, cutting and root rots, stem lesions, and leaf blights. Recently a Calonectria sp. was isolated from rooted cuttings of Anadenanthera peregrina (Fabaceae), Piptadenia gonoacantha (Fabaceae), and Azadirachta indica (Meliaceae)...