Many cultivated plants are susceptible to various diseases, including cucumbers. Diseases (and their treatment in the future) are best prevented. Otherwise, you can lose, if not the entire crop, then most of it. To prevent this from happening, you should take preventative measures and take immediate measures to eliminate them at the first symptoms, then the fight against cucumber diseases will be effective.
Classification of diseases
All diseases of cucumbers (you can find the photo right away) are divided into three groups:
- Fungal.
- Viral
- Bacterial
Fungal diseases
1.
Powdery mildew is the most common disease in this group. It looks like this: white spots appear on the leaves, which eventually affect the entire leaf and move to neighboring ones. This fungus takes all the nutrients from the plant, thereby reducing the yield. The disease may occur if the humidity is too high or the rate of use of nitrogen fertilizers is exceeded. For prevention and treatment:
- change the cucumber planting site annually;
- in the greenhouse, the temperature should be 23-25 degrees;
- water the plant with warm water;
- monitor the moisture of the soil (so that it is not very wet, but also not dry), every 10 days after the first signs of the disease appear, spray the plant with infusion of mullein or colloidal sulfur ;
- if severely affected, cut off diseased leaves.
2. Olive spotting is manifested by round spots on the leaves and fruits of olive color. Because of these spots, the appearance and taste of cucumbers deteriorate. The source of infection are spores of the fungus remaining from last year. For prevention and treatment, ventilate the greenhouse and treat sores with foundationazole.
Among the fungal diseases, there are still brown olive spotting, white rot, gray rot, root rot and others with which cucumbers become infected. Diseases (and their treatment) can be delayed for a long time, so it is better not to allow them, for this, observe the temperature and watering regimen.
Viral diseases
In this group, diseases that affect the cucumbers themselves are most common, and their treatment is to replace the land infected with viruses.
1. Green speckled mosaic is characterized by yellowing of leaves and the appearance of mosaic warts on the fruit. It is necessary to disinfect seeds before sowing with potassium permanganate or heat treatment.
2. The white mosaic appears white or yellow spots on the leaves and the same stripes on the cucumbers themselves. Control measures are the same as with the previous disease.
Bacterial diseases
Bacteriosis is the most common and most dangerous disease of this group. Curves with brown ulcers of the fruit, leaves with holes are observed, and their treatment is carried out using a solution of lime and copper sulfate. If the ailment is launched, it is better to remove the diseased leaves and fruits and bury them. Bacteria spread insects or plant debris.
Other diseases affecting cucumbers are also known, and their treatment is complicated by pests, which not only spread the infection, but also cause considerable damage to the crop. Most ailments can be prevented, because many of them are associated with improper watering, temperature drops and contaminated soil.