Metcalfa pruinosa Say, a dangerous invasive species for various plants in some landscaping from Craiova.
Metcalfa pruinosa (Say), is an invasive species originating from North America, was accidentally introduced into Italy spreading out to to other countries from European continent. In Romania, it was reported in 2009 in Constanta, in Timisoara in 2010, and in 2011 in Bucharest. It has an accentuated polyphagism, attacking around 330 plant species from 78 botanical families. As a result of the researches done in Craiova we identified 87 host plants belonging to 44 botanical families, from spontaneous woody species and ornamentals to spontaneous herbaceous plants and ornamentals from Botanical Garden Al. Buia and Nicolae Romanescu Park where vegetation is very dense. The sweet secrets produced by the cicada favors the appearance of the fungus Capnodium salicinum, which is found on the leaves and fruits of several woody species. On long distances the spread of this species is carried out by vehicles and accidentally by trade of infested plants with eggs. The observations done have revealed that the species particularly attacks young branches and prefers shady places with dense vegetation. If the diversity of host plants is high the cicada shows a high population level and effectively can targeted any plant species which are available.