Ink spot shows up as blackening of the leaves and flower stems. fungal disease on leaves & stems of Strelitzia reginae, bird of paradise plant. dieffenbachiae: Purchase plants free from the disease. Leaf spot is a turf disease caused by fungi. Why have my pansies developed black spots? Leaf spot is a common descriptive term applied to a number of diseases affecting the foliage of ornamentals and shade trees. Some insects also cause damage that appears like a leaf spot disease. Angular, yellow to reddish brown lesions were found on all ages of leaves and petioles. Leaf from the Quercus ilex plant damaged by fungal leaf spot and leaf minor. Read our Leaf Spot Identification Guide to learn how to recognize and diagnose this turf fungus so you can get your healthy lawn back. Elsinoe leaf spot, caused by the Elsinoe hardengergiae fungus, targets purple coral pea and its close relatives. Disease Identification. Disease Symptoms Pathogen/Cause Management; Bacterial Leaf Spot: Translucent spots on leaf margins become reddish-brown with yellow halos. Southern bacterial wilt pathogens are also spread through infected water, fallen … The disease usually starts at the leaf tips, then spreads down the leaves into the rhizomes. The majority of leaf spots are caused by fungi, but some are caused by bacteria. Fungal leaf spot infections tend to develop in humid, moist conditions and the spores are easily spread by wind and splashes of water. A newly described bacterial leaf spot disease of Strelitzia reginae (bird-of-paradise) is caused by a strain of Xanthomonas campestris. Closeup of leaf spots with associated chlorosis of leaf. Avoid overhead watering. Fungal diseases harm the purple coral pea vines' leaves. The bacterium is soil-borne and may remain alive in soil for up to six years, according to the University of Illinois Extension IPM. Xanthomonas campestris pv. Large spots are tan and irregularly shaped. It sounds as though they are suffering from a fungal disease. Fungal leaf spot on Chusan palm leaf (Trachycarpus fortunei). Ink disease is an attack by a fungus called Alternaria alternata which affects kangaroo paws. Ink spot. fungal disease on leaves & stems of Strelitzia reginae, bird of paradise plant Rose spot, Diplocarpon rosae, a fungal disease on rose leaves in summer Close … Leaf and stem blight on peas. Though seldom a problem, the disease Southern bacterial wilt, caused by the bacterium Pseudomonas solanacearum, affects bird of paradise plants by invading the roots. According to the Victoria Department of Primary Industries, this fungal ailment is a common problem for nursery plants, particularly during autumn. Remove infected leaves.