Broad mite
sporadic brown discolouration caused by cork formation. When plants are severely attacked, the growing tip can be killed, plant growth stops and, in time [...] open at the site of deformation. Flowers are often discoloured, and with a severe attack, deformed. Extensive damage can be caused by relatively low populations [...] undersides of young, expanding leaves. Symptoms of an attack remain visible several weeks after the mites have been removed. Life cycle and appearance of Broad