2024 Author: Gavin MacAdam | [email protected]. Last modified: 2023-12-16 13:38
Gooseberry and currant anthracnose is quite common. Red currants are more affected by this ailment, and gooseberries are less common. This attack develops especially strongly by the middle of summer during rainy seasons. To a large extent, excessively thickened plantings also contribute to its spread. Infected berry bushes are characterized by a significant decrease in the growth of young shoots, and not only the sugar content of the berries is sharply reduced, but also the volume of the harvest as a whole
A few words about the disease
When infected with anthracnose, small brownish specks are formed on the leaves of gooseberries and currants, the diameter of which is about 1 mm. On closer examination, you can see shiny dark small bumps on these spots. If the berry bushes were severely affected, then the spots begin to gradually merge.
As the disease develops, the leaves of berry crops begin to dry out, curl upside down and slowly fall off. As a rule, they begin to fall off from the lower branches and if they remain on berry bushes, then usually only on their tops. And from the bushes of red currants, the leaves fall almost completely.
In addition to the leaves, anthracnose often affects leaf petioles, as well as tiny stalks and green shoots, on which small brownish sores appear. The result of the defeat of the stalks is certainly the fall of the berries. And directly on the berries, tiny specks are formed, the centers of which are slightly raised.
The causative agent of this scourge is a pathogenic fungus that hibernates mainly on fallen leaves. And the spread of the pathogen usually occurs in the summer with conidia.
How to fight
An important role in the planting of berry crops is played by the choice of varieties resistant to the destructive anthracnose. The most resistant varieties of white and red currants are Victoria red, Faya fertile, Holland red, Chulkovskaya and Laturnais. And in black currant, varieties such as Stakhanovka, Katun, Altai, Primorsky Champion, Sanders and Golubok are less susceptible to anthracnose.
Fallen foliage under berry bushes should be removed immediately, as harmful fungal spores winter in it. The spread of weeds on the site must be stopped in a timely manner. It is also recommended to dig up the soil in the near-trunk circles - this is done in early spring or late autumn. Pruning with thinning plantings will not be superfluous. And to increase the resistance of crops to anthracnose will certainly help the competent use of fertilizers.
Berry bushes and soil in gardens infected with this disease are abundantly sprayed with either copper sulfate or Nitrafen. The main thing is to have time to do this before the buds begin to bloom in early spring.
It is not forbidden to use Bordeaux liquid in the fight against anthracnose (for ten liters of water - 100 g), as well as colloidal sulfur, copper sulfate (for ten liters of water - 40 g) and the means "Phtalan", "Kuprozan", "Khomycin" or "Kaptan" - they carry out treatments immediately, as soon as the first symptoms of an unpleasant disease are noticed. And the second spraying usually falls on the period after harvest and is carried out ten days after its end.
The preparations "Oxyhom", "Hom" and "Abiga-Peak" are also suitable for treatments. And less effective in the fight against anthracnose are "Profit" and "Ditan M-45".
With especially severe damage to vegetation, you can use "Fundazol", "Ridomil Gold MC", "Skor", "Profit Gold", "Previkur", "Ordan" and "Acrobat MC". These fungicides are systemic contact drugs of a new generation, the spectrum of action of which includes an antispore-forming, therapeutic and protective effect. However, it is recommended to carry out treatment with such means no more than once a year.
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