Q. Pittosporum Tree – Half Dead I've just returned from USA, having been away since early March, to find, with horror, that my Pittosporum tree (about ten feet tall) has an awful lot of dead leaves on it. Completely necrotic spots are rare, and the infected tissue remains alive for a very long time. Spots angular, vein-limited, chlorotic, rarely necrotic, pale green to yellowish-brown above, light yellow to olive-brown below, soli-tary spots 1-5 mm., confluent spots much larger often covering more than one-half the area of the leaf. Leaf margins will curl inward if stressed. White, orange-scented blossoms turn yellowish upon pollination. PLAKIDAS: ANGULAR LEAF SPOT OF PITTOSPORUM 607 TECHNICAL DESCRIPTION Cercospora Pittospori sp. Flowers, which do not differ in anything from those of Pittosporum tobira, are small, plentiful, white and full of aroma. common diseases of pittosporum are angular leaf spot, Rhizoctonia aerial blight, Southern blight, root rots and dieback. In its early stages, the Alternaria leaf spots are similar to the Angular leaf spots. ITs all over the leave, the wood and even the trunk of the worst affected plant. Pittosporum plants are very versatile and thrive well in the sun or shade. It may also suffer from infestations of pittosporum sucker, aphids or cushion scale. The leaves are leathery, ellipsoid – obovate, and gray – green color with peripheral creamy spots that sometimes extend to almost all the surface of the leaf. Getting rid of black leaf spot must be a two-pronged attack. Pittosporum are generally healthy plants with the problems noted below being caused by cooler than average conditions or water-logging. Both green and variegated varieties of Pittosporum shrubs in gardens in Florida, southern Louisiana, and along the Mississippi coast are affected by an angular, chlorotic spotting. Pittosporum tenuifolium is susceptible to leaf spot and powdery mildew infections. Learning the proper ways on how to plant and care pittosporum plants is easy. Soon the entire leaf turns yellow and falls. Treating Black Leaf Spot Fungus. Ive been trying to save a large, well established Pittosporum tenuifolium hedge which has been seriously suffering from what seems to be black sooty mould. nov. No serious insect or disease problems though aphids, scale, mealybugs, root-knot nematodes, and whiteflies may occur. The photo which I will attach shows at the bottom, two of the five Wheeler's Dwarf Pittosporum plants all of which I planted in the same manner in January of this year in the front of my house in Glendale, AZ (Zone 9). For the past three or four months, temperatures have been brutally hot consistently higher than 105 F, often more than 110 F . Very cold temperatures and frost can … If grown indoors the two-spotted spider mite can be a problem. Affected leaves eventually fall off and in bad cases the plant can be severely affected. Angular Leaf Spot Angular leaf spot, caused by Cercospora pittospori Plakidas, was first described in 1949 and is common in field and landscape plantings of pittosporum that are not routinely sprayed for its control. Leaf spot, bacterial blight, and crown/root rot can also cause problems. ... Angular leaf spot will generate tan to light yellow spots on the upper side. Information about Pittosporum Plants. LEAF SPOT The symptoms of this problem are dark spots on the leaves. As the fungus develops, those black spots on leaves are ringed with yellow.