Pathogenic and morphological-cultural characteristic of blueberry (Vaccinium uliginosum L., 1753) parasite fungus Godronia cassandrae Peck, 1887 = Fusicoccum putrefaciens Shear, 1917

Abstract

The fungus Godronia casandra is highly pathogenic, it lives in the soil, it is quarantined.

  The fungus penetrates into the plant from the roots and the root neck. The disease will first appear at the root collar and on the shoots and branches close to the root collar.

  In case of severe disease, the branches are split, cracked and the spots are sunken. Such diseased shoots wither.

  It infects fruit and leaf buds, which turn red, wither and fall. Diseases of young and immature leaves, immature fruits.

  In pure culture, the aerial mycelium of the fungus is white, cottony. Substrate mycelium is dark yellowish in color. Development of pycnospores takes place in 12 days. Development of pycnidia occurs in 1 month after sowing, and development of perithecium occurs in one and a half months or 2 months after sowing.

   In pure culture, fungus fruiting occurs first in the form of dense black dots, and then in the form of small mounds. Pycnospores are produced in large numbers, abundant sporulation is characteristic, ascospores are also in large numbers.