In the summer gardeners notice how on sprouts of malinny bushes there are reddish, dark lilac spots which in a short space of time increase in sizes, become brown, leaves dry up, are showered. The harvest of fragrant berries of raspberry decreases.
What happened to raspberry?
Raspberry was struck by didimella, or purple spottiness. It is widespread fungal disease. It is shown not only on raspberry stalks, but also affects scapes, leaves, buds of plants. On escapes and scapes spots of lilac-reddish or brown-brown color are formed. Such spots, ""creeping away"", cover the lower and average parts of stalks of raspberry. Further bark begins to crack. At heavy fungal flash the scapes with leaves dry up and fall down. And on them dark brown-brown stains also appear.
Why bushes of raspberry get sick?
The infecting agent winters on the struck stalks and fallen leaves. The infection is transmitted with the wind, infecting healthy bushes of raspberry. Strong thickening of landings contributes to the development of fungus. Especially plants on heavy soils where there is a lot of nitrogen are ill.
When does ""outbreak"" of disease of raspberry happen?
Fast spread of disease is ""helped"" by warm damp weather. Fungal disputes ripen in July-August. Grib wanders from one plant to another, infecting landings of raspberry. And in separate years it is possible to lose in general completely harvest if the wrecker - stem midge joins disease.
What to do if raspberry has ached?
During gathering berries it is only possible to cut sick stalks, fallen leaves and to burn them. To apply ""chemistry"" inadmissibly.
After harvesting, it is necessary to perform inspection of all plants of raspberry once again. To repeat cutting of the ""defective"" stalks if they were again shown and also to cut otplodonosivshy and underdeveloped escapes. To collect fallen leaves and everything to burn, or to dig in compost heaps. In this case, it is necessary to carry out processing of landings by fungicide, for example, the Bordeaux mix. It is necessary to feed up raspberry, having brought double dose of potassium at normal norms of introduction of nitrogen and phosphorus.
Measures of prevention and protection against disease.
In the spring twice, before blooming of kidneys and before blossoming, bushes of raspberry should be processed the Bordeaux mix, following the instruction.
On the garden site it is better to land initially healthy planting stock as fungal ""sores"" move with them to garden. Landing beginners, it is necessary to cut off shortly stalks, almost to the rhizome. Growth kidneys near rhizome are enough for renewal of growth of stalks.
It is necessary to land raspberry with stock that plants were well aired. If bushes lay down on the earth, then they should be lifted on lane.