Reversion
Known for a long time wiroza black currant - is resulting in changes in the appearance of the leaves, which are smaller, often tends constructed trójklapowe, the three major nerves. The key, however, are distortions of Flowering and flowers. Sometimes, instead of Flowering shoots formed distorted. Many flowers falls, and the other has not zawi±zuj± crop of fruit. Finally, the plant ceases to bear fruit. Reversion in Poland in 1967, said Maszkiewicz, but is not likely to be widespread. Reversion virus is usually transmitted by vegetative propagation of plants infested, and by wielkop±kowca porzeczkowego.
Protection of plantations against reversion is wykopywaniu and destroy infested plants and the fight against wielkop±kowca porzeczkowego.