The Content Of The Article:
- Sharka virus - deadly danger for plums
- Monilia lace drought - danger for fresh shoots
- Plum wrappers - maggots on the move
- The gall mite - small and mean
- Avoid diseases and pests due to care mistakes
Although prunes are robust, they are susceptible to certain pests and plant diseases in the case of care errors. What these are, how to recognize them and how to fight them, you will find out here.
Although the precious plum is considered to be quite robust and many varieties can be cultivated well in regions with harsher climates, the fruit plant is not completely spared by diseases and pests.
However, when cultivating precious plums according to their habitat and irrigation needs, diseases can be largely avoided, as weakened plants are far more susceptible to damage of all kinds.
The following diseases and pests have been observed on the plum:
- Plum pox virus
- Monilia lace drought
- plum fruit
Sharka virus - deadly danger for plums
The Scharka virus can occur on all plums. There is no disease that fear more German gardeners, because the infestation extends to the entire tree and can effectively fight the Scharka virus not.
Initially, the disease can hardly be detected. In summer, leaf discoloration occurs, reminiscent in shape of rings and clouds. The trees are sick and grow worse than usual. If fruit ripeness sets in, smallpox-like deformations can be recognized on the fruits. Therefore, the Scharka disease is also often referred to as smallpox disease. The otherwise yellowish flesh shows reddish discoloration. The plums fall from the tree earlier than usual. The fruits taste slightly bitter and are no longer edible.
If a plum is infected with the Sharka virus, there is no salvation. The trees must be felled and destroyed immediately. The occurrence of Scharka's disease is notifiable and report to the responsible community.
" Tip: House birds are especially susceptible to the Scharka virus. In the case of prunes, the varieties Large Green Reneklode and Count Althanns are considered to be resistant to the pathogen.
Monilia lace drought - danger for fresh shoots
The Monilia lace drought is a fungal disease that first begins in the flowers and then continues to the young shoots. The trees initially take no significant damage. Since the fungus nestles in the fruit wood and overwinters there, trees can suffer from the disease for years. Over time, this weakens the plant more and more, until it eventually grows stunted and eventually dies.
An infestation is visible on the flowers. These open as usual, but start to wither away a little later. Soon after, the leaves wither. They lose their color and wither away. The shoot tips also die. The infested plant parts do not fall to the ground, but remain on the tree and serve the mushroom for hibernation. In spring, the cycle starts again from the beginning.
With good care, the Monilia lace drought can be largely avoided. If symptoms of the fungus show up, the affected shoots are generously cut back into the biennial wood.
" Danger: The accruing cutting material must not be disposed of on the compost, but should be disposed of with the residual waste or incinerated.
Infested plums can be treated quite well with biological agents. In this case, sprays with a brew of field horsetail or onion skins have proven successful.
Plum wrappers - maggots on the move
As apple trees are not safe from the codling moth, the plum grower infests the plum trees. Oviposition occurs on the leaves, on the branches and on the fruits. The larvae hatch already after three weeks. They hibernate in the bark or in the soil, and then fall on the fruits in the summer.
This is difficult. The maggots only become visible when the fruits are opened. Often the plums fall prematurely from the tree and feel soft and mushy.
Here the hobby gardener can take preventative action. If a fishing belt made of corrugated cardboard is laid out, the larvae will retreat there. The cardboard should be renewed weekly. Thus, the infestation can not be completely destroyed, but significantly minimized.
The gall mite - small and mean
Gall mites are invisible to the naked eye. Therefore, an infestation remains unnoticed at first. To detect the infestation as early as possible, the orchard should equip himself with a magnifying glass and take a close look at the plant.
" Tip: Gall mites spread especially in warm and dry weather.
In case of an advanced infestation reddish protuberances become visible on the leaves and on the fruits.
Keeping the soil sufficiently humid not only benefits the growth and growth of the plants, it is also effective against gall mites, which appreciate a dry and warm environment. In lacewing and predatory mites, the gall mites have natural predators. In the event of an infestation, the use of biological pesticides based on rapeseed oil has also proven successful.
Avoid diseases and pests due to care mistakes
Healthy and vigorous plants are less affected by diseases and pests.
The following measures serve as prevention:
- warm and sheltered location
- nutrient-rich soil
- Drainage against waterlogging
- pour enough
- Water intensively, especially in case of prolonged drought