Why raspberry leaves turn red in June, reasons and what to do
People who grow raspberry bushes often experience reddening of the foliage. This problem is very dangerous, as it can dry out plants. Therefore, it is necessary to figure out in advance why the leaves of raspberries turn red in June and what to do about it.
Causes of reddening of raspberry leaves
There are several reasons why spots with a bright red color appear on the surface of the foliage.
Lack of phosphorus
Phosphorus is considered the main nutrient required for the development of the raspberry bush. The lack of this component negatively affects the fruiting and flowering of seedlings. The first signs of phosphorus deficiency appear in the spring, when buds should appear on the stems of the bushes. In plants that do not have enough phosphorus fertilizers, buds appear with a delay.
Also, a phosphorus deficiency is evidenced by the fact that the seedlings fall off flowers with buds.
The leaf plates are covered with dark spots with a red tint. Gradually, all affected foliage deforms and begins to dry. Only phosphorus-containing feed mixtures can save plants.
Fungal diseases
Another reason why raspberry leaves turn red and dry is the development of fungal ailments. Common diseases that are caused by a fungus include:
- Anthracnose. A common pathology that affects not only raspberries, but also other garden crops. Symptoms of the disease appear on foliage, berries, buds and stems. In order to identify anthracnose in a timely manner, it is necessary to examine the sheets. Small dots of a reddish hue appear on them, the size of which gradually increases.
- Septoria. A disease that most often appears on raspberry bushes. At first, the lower leaves are covered with a red spot, but then the bush begins to dry.
- Verticillosis. This is a dangerous disease, due to which the yield decreases 2-3 times. The symptoms of verticillosis include drying of the leaves and cracking of the stems.
Insect pests
The reasons for the development of red spot include the attack of pests on seedlings. There are several insects that often appear on raspberry bushes:
- Gallica. It is a small yellowish mosquito that damages foliage and stems of garden crops. Reddish spots form on damaged areas of plants. If the gall midge is not eliminated in time, it will damage more than 80% of the shoots..
- Nutcracker. When this pest damages the leaves, reddish swellings appear on their surface. Damaged foliage cracks and dries up.
- Aphid.The most common pest that appears on all garden and horticultural crops. First, aphids damage inflorescences and young shoots. However, gradually the number of pests increases throughout the bush.
What to do to get rid of redness?
To get rid of red spots on the surface of the leaves, you need to use the following means:
- Inta-Vir. The tool is used if the spotting has appeared due to pests. Inta-Vira contains components that help to destroy pests in 2-3 sprays. You can use the drug no more than twice a week.
- Fitoverm. A universal drug used to treat fungal diseases and eliminate insects. Shrubs are sprayed with Fitoverm three times a month.
- "Aktara". To get rid of insect pests, it is enough to treat the plant with "Aktara" once.
How to prevent the problem?
So that redness never appears on the leaves, you need to familiarize yourself with how to prevent this problem. Raspberry bushes are less likely to get sick if you protect their roots from mechanical damage. Also, in order to prevent the development of diseases, it is necessary to regularly feed the bushes with organic matter and mineral fertilizers. Top dressing is added 4-5 times per season.
In addition, the following preventive measures must be observed:
- regular spraying of raspberries with fungicides;
- replanting bushes to a new place every 5-7 years;
- periodically pruning to remove weakened or diseased shoots.
Conclusion
Raspberry gardeners sometimes experience reddening of the top and bottom leaves. To eliminate red spots, you need to familiarize yourself with the causes of their appearance and effective treatments.
