Although frangipanis are fairly hardy, there are some pests and diseases which can affect them, predominantly fungus, scale, frangipani rust and stem rot.

Fungus, Mold & Powdery Mildew

Leaves affected by fungus or mold can be sprayed with a copper based fungicide and white oil solution. If you prefer organic solutions, try a mixture of powdered milk powder and white oil or detergent.

Keeping plants well nourished helps prevent fungal infections. Potash is particularly good for improving disease resistance in frangipanis.

Hemispherical Scale

Leaves affected by hemispherical scale have dark to light brown bumps that are glossy, smooth and hemispherical. Leaves may have a black sooty coating.

Scale can be treated by spraying with white oil in spring to early summer. If you prefer organic solutions, try encouraging natural predators to your garden, such as ladybugs, the scale eating caterpillar, and parasitic wasps. Many plants attract ladybugs including daisies, zinnias, and zucchini. Continue reading →