A Sign of Excess Humidity White mold, similar to powdery mildew, is another fungal issue that can appear as a white powder on your plant's soil. This mold thrives in conditions of high humidity ...

Powdery Mildew (PM) is a fungal leaf disease caused by Blumeria ... affected crops may appear yellow when viewed from a distance. Fluffy white to gray mycelia develop on the top of the leaf (Fig 1A), ...

Efflorescence is the white powdery substance you might notice on basement walls, concrete surfaces, or masonry materials. It forms when water moves through a porous material like concrete or brick ...

Your description sounds like you have a problem with whiteflies and a population big enough that it requires treatment. Despite their name, they resemble moths more than flies and are a common ...