Corineum of stone fruit
This problem is linked to the presence of a particular type of fungus, called Stigmine carpophila, also known as Coryneum beijerinckii. The fungus spends the winter in the form of a mycelium or (more rarely) as a spore, after having invaded the rameal and gemstone lesions. The conidia, after wintering, germinate and penetrate into the tissues, where they then give rise to infection in the spring. All the organs of the plant are affected (fruits, leaves, young branches) and the infection develops in very humid and rainy periods, when the temperatures are between 5 and 25 ° C. It should be remembered that, on the other hand, high temperatures block the development of this pathogen: when 25-26 ° C is exceeded, development is inhibited. It is a disease that usually affects plants already weakened by other causes that may be environmental or parasitic. This pathology is also known by the term impallinatura.
The treatments carried out against the bubble are also valid against this pathogen, since the products are practically the same. It should be remembered that some incorrect agronomic practices, such as excessive nitrogenous fertilizations and exaggerated irrigations favor the onset of this disease. Indirect fight against spalling consists in adopting correct agronomic practices and removing the affected branches which are subsequently burned. For the chemical fight many products are available such as cupric salts, Thiram, Dithianon, Ziram, Dodina, Bitertanolo , the compound Bitertanolo + Dodina and the thiophanate methyl. Generally two treatments are performed: one at the beginning of the fall of the leaves and another at the complete fall of the leaves with a mixture between a cupric product and one based on thiophanate-methyl or Bitertanol.Complementary interventions
The complementary or good practice interventions to prevent the onset of the problem consist of different, correct practices to be adopted in the different phases of plant cultivation: avoiding water stagnation; perform irrigations under the foliage; during winter pruning remove the infected branches and burn them completely; when operating in plants with the presence of diseased plants, disinfect the tools used for pruning before moving from one plant to another and intervening on those that are infected as the last; when large branches are pruned, protect the large cutting surfaces; do not damage the woody organs of plants; always carry out correct fertilizations, without excesses.