Terry black currant

Currants are very often susceptible to various diseases. Quite often, you can find twisted leaves from aphids, fallen, dry leaves or berries fall off before they ripen. You can also find in it signs of a disease such as the terry black currant. What kind of disease and how to cope with it, we will describe below.

Terry black currant: a description of the disease

Terry black currant: photo

Terry black currant arises from such a pest as a kidney mite. The tick could pass during transplanting if the seedlings were taken from an infected plant. This tick only carries the disease, and the disease itself is viral, and it develops inside the vessels, moves along with the sap along the entire length of the plant. What is noteworthy, in the first year, the disease may not declare itself in any way, but when the plant gets stronger, the virus begins to be active, affecting even the inflorescences. As a result, currants are reborn into a wild state. The dangerous thing is that even when the disease seems to have receded, it can return again after some time.

Terry black currant: signs of the disease

Terry black currant: photo

You can find terry on black currants in the spring.

• Deformation of the leaves occurs. Instead of the usual five-lobed leaves, they turn into three-lobed ones. It turns out that the two lower teeth are combined into one. The teeth themselves lose their sharpness and, as it were, are rounded.
• The leaves take on a darker shade. Suffice it to compare with other healthy bushes, the difference will immediately become obvious to you.
• They become more elongated in shape. Many twigs with small leaves appear, the shrub thickens strongly.
• Try to smell the currants, if you know its aroma, then you can easily understand that this specific aroma is gone.
• If by these signs, you still could not determine the disease, then by the flowers you will immediately understand. The inflorescences are strongly elongated, the color becomes lilac. Ovaries to future fruits are not further formed from them. They just stretch out into a green thin branch.
• If the plant has just been affected by the virus, then the fruits will be, but they will be very small.

How and where does the disease appear, and what is the danger for currants

Terry black currant: photo

As we said above, the main carrier of the terry black currant is the kidney mite. Therefore, it is very important to check the seedlings, whether purchased or from your site, for the presence of this pest. It is very simple to check - the buds of an infected seedling will be swollen. The plant becomes infected during the feeding of the tick, and then penetrates directly into the soft tissues. But not only this type of tick carries the disease, but also the spider mite, as well as aphids and bugs. The virus successfully hibernates in the plant and then passes along with the seedlings or during the grafting of the cuttings onto a healthy bush. It can also be transmitted in cases where you used garden tools first on the affected plant, then switched to a healthy bush. The disease is dangerous because the bush completely regresses to a wild-growing state. Terry black currant often does not manifest itself in the first year, it can hide, and you will calmly continue to transplant seedlings from this bush, even without knowing that it is already infected. And the seedlings obtained from this bush will not bear fruit.When a disease is detected, do not be sorry, you must mercilessly destroy all the bushes and replace them with new, healthy ones.

Disease prevention

Terry black currant: photo

As we said above, the only correct solution is to destroy all affected bushes immediately. The disease does not respond to treatment. The only thing that can be done is to take preventive measures in a timely manner:

• closely monitor the presence of a kidney mite on the plant, if detected, immediately remove the affected areas. If there are enough of them, it is better to remove the entire bush. We perform this procedure before the buds have not yet blossomed.
• in the spring we inspect all new and old seedlings for the presence of pests.
• we choose varieties that are resistant to diseases. Usually these are varieties with earlier ripening, when the buds are formed even before the bud mites awaken (Pamyat Michurin, Kent, Zhelannaya).
• we carry out pest treatment on the site in a timely manner.
• we do not leave debris, dried and rotted leaves under the bush.
• We plant currants next to strong-smelling plants such as wormwood, parsley, basil, and next to bright flowers such as marigolds, dandelions, calendula. They will scare off various pests from the currants.

Ways to combat kidney mites

Terry black currant: photo

In the spring, we inspect the currants for the presence of pests, at this time signs of damage are especially noticeable. If you notice swollen kidneys, they become loose even before opening, you should immediately get rid of them. If the affected areas are everywhere, then we pull out the bush. It is imperative to burn all the affected elements. Another effective method is the treatment of the affected areas with boiling water. After the infected shoots have been removed, we collect the remaining ones in a heap using a rope or other improvised means, and scald with boiling water. The water temperature is 80 degrees, too hot water will destroy the plant. Sick bushes are also treated with chemicals. Solutions with an insecticidal effect, such as "Lipidocida", "Bitoxibacellin", "Fufanon", "Acorin", and also kollidny sulfur are suitable. Apply these funds according to the instructions on the package. The first treatment must be done in the period just before flowering, this is approximately early spring. During this period, the active life of ticks begins. The second treatment is in the summer. Important! We carry out processing only until the fruiting period. If necessary, if all else fails, then we process it in late autumn, after harvesting. Along with the main methods of struggle, there are also folk methods, such as tincture of tobacco dust, onion and garlic husks. Comprehensive measures will help you get rid of this pest for a long time. Remember that by destroying the carrier, you will save your plant. Therefore, there is no way to combat the terry virus, so it is important not to bring the plant to the point of being affected by this virus.

Top dressing currants

Terry black currant: photo

In the fight against the doubleness of black currant, special feeding also brings good results, which increase the immunity of plants. Basically, it is worth choosing phosphate-potassium fertilizers. They give the greatest effect. It is important to remember that for the propagation of currants, you need to use only those bushes that have not been sick for at least four years. Also, experienced gardeners use spraying with solutions of manganese, molybdenum and boron as a top dressing. On the contrary, nitrogen-containing fertilizers attract pests. They need to be applied in moderation. In the fall, when the entire crop is harvested in the garden, you can spray with a solution of colloidal sulfur.

Terry black currant: tips

Terry black currant: photo

• It is recommended to buy seedlings only from trusted gardeners, and best of all from specialized nurseries.
• If, nevertheless, it was not possible to avoid infection with terry, then after removing all the bushes, new ones cannot be planted in their place for another five years. Therefore, we choose a different planting place for new seedlings. Any other crop can be planted at the site of the felling, because this virus infects only currants.
• All plants require care and attention. Therefore, do not forget about currants. We always carefully inspect it, because sometimes timely detection can save the entire crop.
• We carry out the correct watering. If you overdo it, pests will gather on a humid environment.
• We loosen the soil around the bush in time and remove the weeds.

Subject to all preventive measures and with proper care, no viruses are terrible for the currants, including the terry black currant will never infect your berries.