Although frangipanis are pretty hardy, there are some kado unik, kado ultah unik and diseases that may affect them, predominantly fungus, level, frangipani corrosion and stem rot.
Fungus, Mold & Powdery Mildew
Leaves affected by fungus or mold could be sprayed with a copper based fungicide and white oil solution. If you like organic solutions, try a mixture of powdered milk powder and white oil or detergent.
Keeping plants well nourished aids in preventing fungal infections. Potash is particularly good for improving disease level of resistance in frangipanis.
Leaves affected by hemispherical scale have dark to light brownish bumps that are glossy, even and hemispherical. Leaves may possess a black sooty coating.
Scale could be treated by spraying with white-colored oil in springtime to early summer. If you like organic solutions, try encouraging natural to your garden, such as for example ladybugs, the scale eating caterpillar, and parasitic wasps. Many plant life attract ladybugs which includes daisies, zinnias, and zucchini.
There is a new disease attacking frangipanis in Australia called frangipani rust. It really is most noticeable in late summer and early autumn. An orange to yellowish powdery substance (actually pustules) appears on the lower of leaves. They rupture and spread spores which pass the disease to other plants nearby. The upper sides of the leaves are dark brown and discoloured. Severe infections may cause the leaves to drop prematurely and can lead to the death of small plants, however larger trees may actually suffer no side effects (aside from leaf drop).
To control frangipani rust use a fungicide (such as for example Mancozeb) in the warmer weeks to slow the advancement of the . Losing all fallen leaves in winter and spraying the tree and the region beneath the tree with a fungicide may gradual the reappearance of frangipani corrosion next season.
The good thing is that lately some frangipani trees have built up a resistance to rust, so that it may be on it's way out.
Stem Rot & Black Tip Dieback
As frangipanis lose their leaves over wintertime, soft, withered stems could become visible. It's a condition called stem rot' and it's really quite common in trees which have been stressed by frosts, drought, lack of sunlight or just plain old age.
The simplest way to keep it in order is to just prune off any diseased growth, but when you do, it is important to make sure you cut it right back to good, healthy tissue.
Dying tip growth is often referred to as black tip dieback. Some newer deciduous cultivars and evergreen frangipanis are especially prone to the disease.
Commercial frangipani growers suggest the issue is usually worse in areas where fruit-spotting bug and beetle activity can be high. The reason being any insect attack on the end of the plant predisposes it to a secondary dieback infection.
Affected plants typically reshoot under the damaged portion of stem. If plant life appear unsightly or you are concerned that the rot is usually advancing down the stem, use sharp pruners to cut back to clean tissue. Make sure to use hot water or household disinfectant to clean pruners between cuts so as to minimise potential disease transfer.