Pretty sure that is the white stuff you see on the trunk, which is also causing your tree to be sticky; The sicky stuff is cause by the exrements n ths aphids, which consists of water & suger, for the most part. Nevertheless, one should be very attentive regarding the diseases that can afflict these trees, such as crown gall, leaf infection, and leaf and stem spots. Thanks for bringing the Ficus benjamina (Weeping Fig) leaf samples and photos into the MGCC office this morning. Ficus plants are susceptible to pests and diseases that cause white patches on leaves and stems. Thrips produce large, silvery patches in … It thrives in dry, warm days in the 60s and 70s, followed by cool, humid nights. I got a Ginseng Ficus 3 months ago and up to the last couple of weeks its leaves have been turning yellow. However, over the past few months about 20 leaves have become coated in fuzzy white spots that do not simply wipe off like dust. I got a Ginseng Ficus 3 months ago and up to the last couple of weeks its leaves have been turning yellow. These spots are white, waxy and circular and might initially be confused with disease or pests but are actually characteristic of some Ficus plants. Sticky Bonsai leaves 4 years 2 months ago #18186 Check out woolly apids and how to treat them. Ficus Leaves Turn White - Knowledgebase Question. Leaf Spots: Black spots of very small size usually develop on the back of the leaves. Brown spots on fiddle leaf fig leaves can be frustrating and confusing. Ficus plants are susceptible to pests and diseases which cause white spots on leaves and stems. The telltale sign of bacterial leaf spot in your Fiddle Leaf Fig is yellowing of the leaves in addition to the brown spots. About the Rubber Tree Houseplant . A fungal disease, anthracnose is characterized by necrotic spots on the leaves and commonly causes tip dieback in ficus plants grown indoors. Can you see a white crust on the soil surface? Three months ago, I brought a 5-foot ficus tree to a similar non-direct lit area indoors. Meanwhile the ones which have been healthy have developed white spots as if lining the outer edge of the leaf.