Fungal parasites on native tree species from Central Amazon.
Little is known about the phytosanitary problems in forest plantations on degraded sites in Central Amazonia. To identify the diseases that affect these plants, in 2006, survey of forest plantations in Manaus-AM and Presidente Figueiredo-AM was conducted, where the following pathogenic fungi causing leaf spots and sooty molds were identified: Cylindrocladium sp. and Meliola sp. on crab-wood (Carapa guianensis); Sclerotium coffeicola and Meliola sp. on mahogany (Swietenia macrophylla); Cercospora sp., Rhizoctonia sp. Pseudobeltrania cedrelae and Meliola sp. on cedar (Cedrela odorata); Cercospora bertholletiae and Yamamotoa sp. on Brazil nut (Bertholletia excelsa); Erythrogloeum hymenaeae, Colletotrichum sp., Pestalotiopsis sp., Meliola sp., Asterina sp. and Amazonia sp. on stinking-toe (Hymenaea courbaril); Meliola whetzelii on rose-wood (Aniba rosaeodora) and Rhizoctonia sp. on balsa-wood (Ochroma piramidale). Tests of pathogenicity and reisolation of pathogens were conducted, following the Koch Postulates. Stinking-toe and cedar had the greatest fungal incidences. Cylindrocladium sp. on crab-wood, Meliola sp. on mahogany, Cercospora sp., Rhizoctonia sp. and Meliola sp. on cedar, Pestalotiopsis sp., Meliola sp., Amazonia sp. and Asterina sp. on stinking-toe, M. whetzelii rose-wood and Rhizoctonia sp. on balsa-wood are reported for the first time on these hosts species.