It is a plant pathogen that grows on Gossypium, Lavatera assurgentiflora, Malachra capitata, Malvastrum coromandelianum, and species of Malvaceae.

Brasiliomyces malachrae forms white colonies made of superficial mycelium on its host's leaves.

[4] Brasiliomyces is distinguished from all other Erysiphales because of its "thin, semitransparent chasmothecia peridia" which is made of a single cell layer.

[3] In addition, it is ecologically unique for being the only species of powdery mildew that forms abundant ascocarps in tropical climates.

[3] It gets its energy and nutrients by parasitizing flowering plants related to false mallows (Malvaceae) and oak trees.

[3] This type of infection causes a decrease in plant growth and an increase in the rate at which the host's tissues deteriorate.

Brasiliomyces malachrae has an economical impact on human life because it infects wild and cultivated cotton.