2024 Author: Gavin MacAdam | [email protected]. Last modified: 2023-12-16 13:38
Raspberry shoot burn is also called purple stem spot or didimela. It is one of the most destructive and harmful fungal diseases. A massive defeat of raspberry shoots with this disease occurs, as a rule, towards the end of September. Sometimes didimela also attacks gooseberries with blackberries. Often this attack leads to a general weakening of the main ones, as well as to the withering of side shoots with their subsequent death. The yield also decreases markedly
A few words about the disease
On annual raspberry shoots, when affected by this nuisance, the formation of brownish-purple spots of a relatively small size is noted. Mostly they can be seen in the places where the leaves are attached.
Gradually, the size of these rather unpleasant spots increases, and they easily reach two or more centimeters. Then the spots acquire a dark brown tint and are characterized by the middle of light shades, in which, after some time, black and brownish tubercles are formed. And closer to the end of the season, dark brown or purple sores can already be observed on the shoots.
With the onset of the next season, all the spots on the raspberry shoots gradually brighten, and the tubercles that appeared earlier begin to appear more clearly. After a while, they begin to crack, and the bark peels off strongly (this is how the fungus emerges). In winter, diseased shoots become very fragile, brittle and break without much difficulty.
Didimela is caused by a fungus called Leptospaeria coniothyrium. It hibernates almost always on dead or infected shoots. And with the onset of spring, the released spores are spread to young one-year-old raspberry shoots by the wind or with rain spray. Basically, the spread of this harmful fungal disease occurs in the summer period with conidia. Long wet periods favor its development.
How to fight
When growing fragrant raspberries, it is extremely important not to allow thickening of the plantings - it is a serious obstacle to good lighting and airing of berry bushes. Air circulation inside the landings should be as good as possible. Weeds growing in plantations significantly reduce air movement, therefore weed vegetation must be destroyed in a timely manner. To ensure the penetration of sunlight and improve air circulation, it is recommended to plant raspberries in narrow rows, and then systematically thin out the middle of these rows.
Excessive use of fertilizers (and nitrogen-containing ones in particular) should also be avoided, as it helps to enhance the growth of a particularly susceptible to the disease of the succulent mass of plants.
It is best to plant raspberries in open and sunny areas, where all conditions are created for good air flow and excellent drainage. It is recommended to remove the surrounding wild blackberry and raspberry bushes, since they are often the sources of the spread of harmful spores not only of didimela, but also of a number of other equally dangerous diseases.
Bordeaux liquid (300 g is consumed per ten liters of water) and "Nitrafen" help well in the fight against the burn of shoots. As a rule, they are used before the start of bud break. And at the beginning of the growing season, when the shoots grow about fifteen to thirty centimeters, the berry bushes are sprayed with one percent Bordeaux liquid first before flowering, and then as the crop is harvested.
After harvesting, you must also remove and subsequently destroy all two-year old shoots along with infected annuals. It is best to remove them when the plants are in the dormant phase. However, old shoots should be cut and destroyed before spring growth and development of raspberry bushes begins.
Recommended:
How To Properly Burn Garbage In The Country
There are plenty of branches, foliage, construction residues and other combustible waste in the country. Many people burn it, not knowing the laws of open fire in the countryside. Let's deal with the legislative postulates. Read the details of what and how to burn and what we can be fined for
Bacterial Plant Burn
Bacterial burn is an extremely dangerous infectious disease that affects various types of vegetation. Pears, hawthorns, cotoneaster and plants from the Pink family often suffer from it. If signs of fire blight are found, appropriate action should be taken immediately
Unpleasant Gooseberry Shoot Aphid
The gooseberry shoot aphid, like most other pests, is found almost everywhere. Her range of taste preferences includes not only gooseberries - this unpleasant pest will not refuse to feast on currants: black, golden and red. During each growing season, an average of eight to twelve generations of pests are reborn. The leaves attacked by larvae and females curl up and gradually form rather dense lumps, inside of which with
List Of Foods To Burn Fat
Information for those wishing to lose weight and for those who have digestive problems. Consider foods that can help improve metabolism and reduce fat cells. How you can get rid of cellulite and lose weight without painful diets
Dangerous Raspberry Shoot Gall Midge
Raspberry sprout gall midge loves to feast on not only raspberries - it can often be found on strawberries with blackberries. And she lives in almost all regions where these juicy fragrant berries are grown. The larvae are especially harmful to the shoots - in the places of their feeding, the formation of brownish specks begins, which subsequently turn black and grow, covering rather impressive areas of the shoots. The damaged areas are gradually colonized by saprophytic fungi, and the shoot bark begins to shake off
