Tricks

Causes of spots on currant leaves

Causes of spots on currant leaves


We are searching data for your request:

Forums and discussions:
Manuals and reference books:
Data from registers:
Wait the end of the search in all databases.
Upon completion, a link will appear to access the found materials.

Galina Pavlovna asked us a question that is relevant for many summer residents: "For what reason can spots appear on currant leaves?"

Orange or other spots on currants are a sign of illness. A diseased shrub is not able to give a good harvest. The appearance of signs of an ailment on red currant is unpleasant, but with the right measures, the problem can be quickly eliminated.

Signs of rust

Yellowish-orange spots on black or red currants are a fungus. Spores are often carried from conifers close to the bush - pine and cedar. But this does not mean the presence of the disease, it develops only in a humid atmosphere.

Important! The fungus tolerates winter well, and infection can begin in spring.

Blackcurrant rust is easy to identify. First, small yellow spots appear on the leaves. On the inside of the sheet, they may be an orange tint. This is the fungus that will soon begin to develop.

Over time, mature spores will appear on the plant. As the disease develops, the inside of the leaf will be completely covered with rusty hairs, the leaf will become as if fluffy.

How to get rid of ailment

Preventive measures will help get rid of the disease on blackcurrant. First, you should choose special varieties of plants that are noted for resistance to fungus. Also, do not plant currants near conifers. Disputes often fly from them. Among other things, you should regularly spray the bushes:

  • during the formation of the first leaves;
  • during flowering;
  • in the process of bud formation;
  • 10 days after the third spraying.

Spraying is carried out with copper chloride and Bordeaux liquid. For the manufacture of the first mixture, 35 grams of 95% of the drug in ten liters of water is diluted. To prepare the second composition, 50 grams of copper sulphate and 75 g of quicklime are taken. They are bred in 5 liters of water.

What should I do if rust spores still occur?

  • eliminate infected leaves;
  • burn them. If you just send the leaves to compost, the fungus will be able to winter;
  • spray the above preparations.

Even if you correctly fulfill all of the listed requirements, disputes may remain. In this case, the treatment should be repeated. Remember to use preventative supplements. They increase resistance to various pests and diseases. Diseases can also be transmitted from gooseberries! For currants, this is not the best neighbor.

Anthracnose

The reason for the appearance of spots on red currants can be anthracnose. In this case, brown lesions are observed. They progress and soon ruin the entire leaf; it dries and curls. Currant ceases to bear fruit.

Methods of struggle

Red currant will recover if you cut off sick leaves. With a neglected lesion, a solution of copper sulfate is sprayed. The bush should account for about 2 liters.

In severe stages, Bordeaux is used. With the help of it, the lower part of the sheet is sprayed throughout the summer. The solution is taken one percent.

Aphid

If brown spots and swelling appear on the leaves, this may be a reaction to the gall aphid. Usually the parasite appears in the arid and hot summers.

Insect eggs hibernate precisely on the leaves of currant. In the spring, the larvae emerge from the eggs and move to the lower part of the leaves. At the same time, they begin to eat leaf juice. For this reason, brown spots appear. The sheet also changes - it becomes ugly in shape.

In summer, shoot growth is reduced. Leaves cease to interest gluttonous insects. After the leaves form in the plant, the aphid begins to move to other plants in the garden. Pests live on them until the end of summer and produce offspring, they lay their eggs again on currants.

After reading the corresponding article on our website, you can find out about the best varieties of black currant.

Ways to fight

If you saw aphids before berries began to form, you should not use chemicals. Better fight the infusions and decoctions of various herbal remedies:

  • garlic
  • medicinal chamomile;
  • shag;
  • yarrow.

So that the mixture sticks better to the leaves, add tar or laundry soap. The solution is simply sprayed over the bushes. Particular attention should be paid to young shoots and the underside of the leaf. As a rule, there are most pests there.

For preventive purposes, spray Nitrafenom. For 10 liters of water will require about 300 grams of funds. The presented method makes it possible to destroy aphid eggs and prevent the appearance of various diseases of currant.

In addition to the methods presented in the fight against aphids, pruning of damaged shoots and leaves will help.

Important! Other insects, for example, double-tails, ladybugs and lacewings, will also help to destroy the parasite. To attract them to the garden, it is necessary to plant nectar-bearing plants.

Aphids can carry and garden ants. In this case, you have to fight 2 pests right away. Actively used solution of onion peel, the drug "Arrow", soapy water. If the aphid leaves almost immediately, it will be quite difficult to drive out the ants. It is recommended to use such products as Fufanon and Garden Protector. It is worth dusting the bush with tobacco dust or cinnamon.

Currant diseases

If spots appeared on the currant, this indicates the presence of the disease. It must be treated, otherwise the yield of the bush will decrease significantly. Before starting treatment, you should find out the cause of the ailment. Depending on this, the method of combating the disease is also chosen. So, when rust is sprayed with Bordeaux liquid, copper sulfate will help from anthracnose, aphids should be removed with a whole range of measures. If you do everything right, the problem will disappear.


Video, Sitemap-Video, Sitemap-Videos