Ekspresowa Analiza Zagrożenia Agrofagiem: Seiridium cardinale (W.W. Wagener) B. Sutton & I.A.S. Gibson

Seiridium cardinale infests species in the Cupressaceae family, causing canker of cypresses. The main hosts of the agrophage are Cupressus lawsoniana, C. macrocarpa, C. sempervirens and Thuja occidentalis. The disease is manifested by yellowing or reddening of the leaves, which with time dry up and fall to the ground. The branches and tops of the trees die back. If there is a spread of infection in several places on one tree, it can lead to the death of the plant in a relatively short period of time depending on its age, susceptibility and environment. On the branches, at the point of penetration of the pathogen, a slight depression, a longitudinal crack and lenticular or elongated cankers with resinous exudate appear, sometimes there is necrosis of the bark. The pathogen appeared in 1927 in California, then spread to Canada, New Zealand, Asia Minor, South Africa and Europe. S. cardinale caused huge losses in the middle of the last century in France and Italy, and its presence was also confirmed in Germany. Due to the widespread occurrence of several host plants in the PRA area and changing climatic conditions, there is a risk of the agrophyte appearing in Poland.