Taphrina pruni being larger than the healthy one. As a fungus, cool and wet weather conditions promote the germination of spores, whilst warm and dry weather results in infection rarely taking place. Colonisation can become extensive and eradication very difficult. The disease can to some degree be controlled by carefully removing infected branches, witch's brooms and fruit before the infective air borne spores are produced. Applications of copper-containing fungicides have a degree of control over the fungus. Taphrina pruni Taphrina pruni is a fungal plant pathogen of blackthorn (Prunus spinosa) that causes the Pocket or bladder Plum gall, a chemically induced distortion
Prunus xueluoensis pseudocerasus". Prunus xueluoensis Prunus xueluoensis is a species of "Prunus" found in Hubei and Jiangxi provinces of China. It is a shrubby tree 0.5 to 3m tall, preferring to grow at 1100 to 1500m above sea level. It is only known from three mountains; Xueluozhai, Lushan and Jinggangshan. It is morphologically similar to "Prunus tomentosa" and "Prunus tianshanica". It differs from them by a number of features including having two to four flowers per inflorescence, many more stamens per flower, a glabrous pistil and a black fruit. Genetically, "P. xueluoensis" is more closely related to "P. polytricha", "P. jingningensis", and