Many cultivated plants are prone to various diseases, including cucumbers.Illnesses (and their treatment in the future) is better to prevent.Otherwise, if not possible to lose the whole crop, its greater part.To avoid this, you should carry out preventive measures, and at the first symptoms to take immediate steps to remove them, then the fight against diseases of cucumbers will be effective.
Classification of Diseases
All diseases of cucumber (with photos can be found here) divided into three groups:
- Fungal.
- Viral.
- Bacterial.
Fungal diseases
1. Powdery mildew is the most common disease in this group.It looks like this: on the leaves appear white spots, which will eventually affect the entire leaf entirely and go to the neighboring.This fungus takes all the nutrients to the plants, thus reducing the yield.The disease can occur if the humidity is too high or exceed the application rate of nitrogen fertilizer.For prevention and treatment:
- annually change the landing cucumber;
- greenhouse temperature should be 23-25 degrees;
- watering plants with warm water;
- follow soil moisture (so that was not too wet but not dry), every 10 days after the first signs of illness spray the plant extract Mullein or colloidal sulfur;
- In severe cases cut off the diseased leaves.
2. Olive spotting appears round spots on the leaves and fruit of the olive color.Because of these stains spoil the appearance and taste of cucumbers.The source of infection are the fungus spores, remaining from last year.For prevention and treatment ventilate the greenhouse and treat ulcers fundazol.
Among fungal diseases found another brown spot of olive, white rot, gray mold, root rot, and others who are infected cucumbers.Illnesses (and their treatment) may be delayed for a long time, so it is best not to allow them to observe the regime of temperature and watering.
Viral diseases
In this group, the most frequent diseases affecting themselves cucumbers, and their treatment is to replace the virus-infected ground.
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 potassium permanganate or subjected to heat treatment.
2. White mosaic appears white or yellow spots on the leaves and the same strips of cucumber on themselves.Control measures are the same as with the previous illness.
Bacterial diseases
Bacteriosis - the most common and most dangerous disease in this group.Observed curve with ulcers brown fruit, leaves with holes, and their treatment is carried out with a solution of lime and copper sulfate.If the disease is started, it is best to remove the diseased leaves and fruit and bury them.The bacteria are spread by insects or plant residues.
There are other affecting cucumber, disease, and treatment is complicated by the pests, which is not enough that spread the infection, but also they cause considerable damage to crops.Most diseases can be prevented, as many of them are connected with the wrong watering, temperature and soil contamination.
