What happened to the raspberries?
Raspberries struck didymella, or purple spots. Is a common fungal disease. It is not only on the stems of raspberry, but also affects petioles, leaves, buds of plants. On shoots and petioles causing spots purple-brown or reddish-brown color. Such spots, "spreading," cover the lower and middle parts of the stems of the raspberry. In the future, the bark begins to crack. When severe fungal outbreak stalks with leaves wither and fall off. And they also appear dark brown spots.
Why raspberry bushes sick?
The pathogen overwinters on infected stems and fallen leaves. The infection is transmitted by wind, infecting healthy bushes of raspberries. The development of the fungus contributes to a strong thickening landings. Sick plants especially on heavy soils, where a lot of nitrogen.
When there is a "flash" diseases of raspberries?
The rapid spread of the disease "helps" warm, humid weather. Fungal spores ripen in July-August. Mushroom roams from one plant to another, infecting planting raspberries. And in some years can completely lose a crop if the disease will join the pest - stem Midge.
What if raspberry sick?
While collecting berries only cut diseased stems, fallen leaves and burn them. To use the "chemistry" is not acceptable.
After harvest, it is necessary to make an inspection of all plant raspberries again. Repeat the cutting "waste" stems, if they again appeared, but also cut otplodonosivshih and underdeveloped shoots. Collect the fallen leaves and burn or bury in the compost pile. In this case, there should be treatment of planting with a fungicide, such as Bordeaux mixture. It is necessary to feed the raspberries, making a double dose of potassium at normal application rates of nitrogen and phosphorus.
Prevention and protection from disease.
Twice in the spring, before Bud break and before flowering, the shrubs should be treated with Bordeaux mixture, following the instructions.
The garden area was initially better to plant healthy planting material, as fungal "sore" move them to the garden. Planting beginners, it is necessary to briefly cut the stems almost to the rhizome. The growth buds near the rhizome, it is sufficient for the resumption of growth of the stems.
To plant raspberries have a stock, that plants are well ventilated. If shrubs fall to the ground, they should raise the trellis.
Advice 2: Why is there no raspberries on raspberries
Why raspberry is degenerating?
Raspberry gives weak harvests in neglected gardens, where from year to year for plants not cared for. Plants annually grow old, press against each other and "fight" for a place under the sun. So the bushes have no time to care about the berries.
Raspberry biologically cannot be degenerate, as it is perennial and in one place can grow up to 12 years.
What we need raspberries?
The choice of a location for growth is an important condition. Raspberry is a plant that loves sun, good air - permeable, moderately moist fertile soil. If you have the opportunity to make organics, put it under the raspberry bushes. Neither currants nor Apple is not in need of humus as raspberry.
Raspberries should be grown on a trellis. The branches must grow in direct and not along the ground. The exceptions are varieties with erect stems.
When planting raspberry plants should be in the 45-50 cm apart, between the rows need to leave 50-60 cm For such planting easy to maintain plants well purged and illuminated by the sun.
Annual inspection of the plants, cutting otplodonosivshih, patients affected by pests and branches to help improve the raspberry bushes and to increase the yield next year.
What shoots are fruit-bearing raspberries?
Raspberry Bush has shoots of two ages. Shoots of the current year and last year. The crop of berries formed mainly on the branches of last year. After ripening, these branches finish their life cycle and shrink. Exceptions are only everbearing varieties, which give a small crop of shoots of the current year.
Why it is necessary to pruning raspberries?
Cut old, who gave the harvest, the branches in the autumn. This ongoing operation stimulates the growth of underground shoots. They will replace the cut, the sick and the weak. In areas where snow cover is small, pruning can be carried out in the spring. Old shoots in winters contribute to retention.