Plathymenia reticulata Benth occurs in open formations of the Brazilian Cerrado and Atlantic Forest. The seeds are affected by pathogens that reduce germination. The use of fungicides is defined for many species, but, for forest species, further studies are necessary. Thus, the aim of this study was to evaluate and identify the physical and physiological quality of mahogany seeds that are coated with fertilizer and fungicide. The treatments were: seed coating with sand + lime + fungicide with different doses of fertilizers. The seeds were evaluated in the laboratory and in a greenhouse. The experiment was conducted in a completely randomized design with four replications of 50 seeds. The treatment with 50 g of fertilizer had the highest weight out of 1000 seeds. There were no infested seedlings among the coated seeds. The coating maintained the quality of the seeds and the coating with high doses of fertilizer inhibited the germination, germination speed index (GSI), emergence and emergence speed index (ESI) of the mahogany seed.

Plathymenia reticulata Benth belongs to the family Fabaceae. It has its own hardwood for luxury furniture, and it is also used in construction. The coating consists in applying thin and uniform layers of inert adhesive mechanism in order to increase the seed size, altering his shape, texture and color, in addition to enabling common use of nutrients, fungicides, insecticides and microorganisms beneficial. The goal of this study was to evaluate the physical and physiological seed's quality of mahogany coated with different doses of fertilizer. The treatments were: T1: sand + lime; T2: sand + lime + 25 g of fertilizer; T3: sand + lime + 50 g of fertilizer; T4: sand + lime + 75 g of fertilizer; T5: sand + lime + 100 g of fertilizer, and control with uncoated seeds. Later, the seeds were evaluated in laboratory and greenhouse. The coating increased up to 91% weight of one thousand seeds without the treatment coated fertilizer. The presence of nutrient seed coating decreases his germination. The doses of fertilizer used were harmful to germination, IVG, emergency and IVE, but did not affect seedlings development.