Why raspberry shoots wither: reasons, control measures

Content:

The article reveals the reasons why raspberry shoots wither, describes measures to combat the problem.

Raspberry shoots wither: an introduction

If you want to get a good and healthy harvest of raspberries, then you need to take proper care of them. In essence, raspberries are not a capricious berry, but if they are not given proper attention and care, they can quite often be attacked by various insects and diseases, which will negatively affect the quantity and quality of the crop. There are times when the recently flowering shoots suddenly start to fade. What may be the reason for this and how to deal with it will be discussed in more detail in our article.

Raspberry shoots wither: what could be the reason

Often the reason for the wilting of young shoots can be the fact that the plant has been attacked by a certain pest. Often the cause of this phenomenon can be the appearance of:
• Stem flies
• Gall midges.
• Purple spot.
Most often, the only way out to get rid of this scourge is to cut off the diseased bush. In this case, you need to make sure that not a single hole or larva remains. Thus, a healthy bush will be able to recover faster and better from the transferred infection and bring a good and healthy harvest. Chemicals can be used only when more than half of the bush has become infected.

Young shoots of raspberries wither: the reason is stem fly

You can understand that the plant attacked this insect by the appearance of the plant. The top of the stem begins to wither, the leaves turn black and eventually die off. To start fighting this pest, you need to understand how it develops. In winter, the fly sits in the soil, and in mid-May begins to emerge to the surface, laying the larvae inside the leaf axils, located at the top. The larvae begin to gnaw out the course in young shoots, which leads to wilting and death of the bush. As soon as you notice that this insect has settled in your raspberry, the affected part of the bush should be cut back to a healthy part of the stem. All that you cut off must be burned, loosen the soil and treat it with a nitrophene solution. To carry out a preventive measure, as soon as the buds appear, they need to be treated with karbofos. To avoid the appearance of this insect, you must:
• Before the winter period, dry leaves and debris must be cleaned from the soil surface. Then you need to loosen the soil and process it. Under the leaves, harmful insects and microbes can accumulate, which tolerate the winter, and then go outside in the spring and can then harm the bushes.
• After the winter period, you also need to remove all excess and debris, loosen the soil and carry out top dressing. Good and proper care is the key to good growth and development of raspberry bushes.

Why raspberry shoots wither: the reason is gall midge

Many summer residents are faced with the fact that in the middle of summer the bush, along with the flowers, begins to fade. The reason for this may be the presence of a gall midge. The presence of this insect can be recognized by routine inspection of the bush in the spring and autumn.If there are no leaves on the raspberry bushes, but at the same time there are thickenings on the branches - galls containing larvae, then this means that the bush was affected. The pest is most often located below, closer to the roots. This has a weakening effect on the raspberry bush, reducing resistance to winter frosts. Gauls can appear several times per season, until the first frost occurs. They wait out the winter season in the ground, at a depth of about 30 cm.To start fighting this pest, it is necessary to prune the bush in spring and clean it for sanitary purposes. To do this, you need to do:
• Cut out all damaged shoots
• Carry out thinning of the bush.
Most often, the gall midge is attracted by the presence of fungal diseases on the bush. Therefore, it is better to start in advance the fight against fungi first. Therefore, in order to prevent the appearance of fungi, it is necessary to spray the bushes before the buds bloom with Bordeaux liquid. In order to prevent the spread of fungi, it is necessary to cut off the sprouted shoots first in the early varieties, then in the middle ones, and then already in the later ones (in the autumn period). Having made such a pruning, you need to spray with the help of products that contain copper. In order to start the fight against Gauls as early as possible, you need to inspect the bushes every day and remove those that have already been infected. In the fight against this insect, folk methods of struggle have also proven themselves well. infusion of mullein, walnut leaves, wormwood and nettle leaves are well suited for this. It is possible to carry out the treatment with a solution of the above herbs in the evening, then you can get the best effect.

Purple spot

This very dangerous disease can harm more than half of the plantings. It's all about the fungus, which negatively affects the bushes, weakens and kills them. The manifestation of this disease most often occurs in the middle of summer. Spots appear that begin to spread throughout the bush. This leads to wilting of shoots, dying off of petioles, drying out of fruits. Bushes die before the fruits begin to ripen. If you do not start the fight against this pest in time, then thanks to your spores, the fungus can be transferred to healthy bushes. What can be done to avoid contracting this disease.
• Those shoots that have been infected should be cut to the very root.
• In summer it is necessary to carry out soil thinning.
• It is necessary as a rule to choose a place for planting crops (there should be no nearby bodies of water).
• Water properly, the soil should not be waterlogged.
• Timely remove all weeds and loosen the soil next to the bush.
• Choose varieties that have good disease immunity.
In order to protect the bush from possible infection, in the spring you need to cut off the branches that have spawned, as well as those branches that have already dried up, and weak ones that will definitely not be able to bring a crop. Be sure to burn what you cut off so that the spores of the mushrooms cannot be transferred to healthy bushes.
What you need to do to treat infected stems:
• Apply Azophos (50%). For 10 liters of water, use 80 g of the product.
• Bordeaux mixture (1%). For 10 liters of water, you need to take 100 g of lime and copper sulfate.
• Nitrofen solution. In 10 liters of water, you need to dilute 300 g of the substance.
• 1% ready-made solution of DNOC.
It is necessary to carry out processing with the help of these funds before the flowering process begins, as well as after you harvest the crop.

Vertical wilt of shoots

This disease spreads to the bark, roots and shoots. It is not so difficult to understand that the plant is sick: young leaves and shoots begin to turn yellow, the tops begin to fade. The stems begin to slow down in growth and die off. Unfortunately, there is no cure for this disease. Those bushes that are affected must be cut off along with the roots and must be burned.To prevent the onset of this disease, you need to use healthy planting material, as well as loosen the soil.

Raspberry shoots wither