You need to know the enemy by sight in order to quickly and skillfully defeat him. We get acquainted with the most common diseases and pests of cucumbers.
There are many serious diseases that damage cucumber plants, resulting in a significant reduction in yield: blotches, rots, damage caused by fungal infections. Cucumber plants and pests do not bypass, so it is important to keep the situation under control.
The main diseases of cucumbers: we determine and treat
Powdery mildew on cucumbers (Cucumis melo caused by Erysiphe cichoracearum)
A common fungal disease that appears as a white powdery coating on the upper side of the leaves.
powdery mildew on cucumbers
What to do if powdery mildew is found on cucumbers?
Spray plants with fungicides, destroy plant debris and weeds. Preventive measures: avoid thick plantings and overfeeding with nitrogen fertilizers. The development of powdery mildew can be suppressed by spraying plants with special preparations: Topaz, Clearflower, Foreshortening and others. Re-spray with fungicides after 10-14 days. For greater effectiveness, it is recommended to alternate drugs.
By the way, cucumbers can also be damaged by downy mildew spores (Pseudoperonospora cubensis). On cool and humid days, the disease affects many plants. Symptoms: Fluffy purple mold on the underside of the leaves; yellow spots on the upper side of the leaves.
Here is more in detail:Β Powdery mildew on cucumbers>>>
Downy mildew or downy mildew on cucumbers
more about peronosporosis>>
Fusarium on cucumbers (Fusarium oxysporum)
Fusarium (cucumber wilt, rot) is a fungal disease common in greenhouses, especially with large temperature drops in spring. It affects both seedlings and adult plants. Symptoms: rotting can cover seedling stems along the soil line; brown spots on one side of the stem; discoloration of tissues inside the vine. Cucumbers look healthy before flowering, then begin to fade. The roots die, the stems dry up.Β
Fusarium on cucumbers>>>
What to do if cucumbers are affected by Fusarium?
Choose varieties of cucumbers resistant to Fusarium, pickle seeds of unstable varieties. Disinfect the soil in the greenhouse, maintain optimal conditions (temperature, air humidity) and water the plants only with warm water. It is possible to use the drug Fitosporin M, in order to prevent the soil before planting seedlings, they are treated with a preparation Living Earth. Severely damaged plants should be destroyed.
Gray mold on cucumbers
A common fungal disease of many vegetable crops. Quite common on cucumbers. At the same time, large brown spots form on the leaves, the shoots rot. Fruits at high humidity are covered with brown, increasing in size wet spots with a moldy gray coating.
What to do if gray rot is found in the greenhouse?
- Do not thicken the crops, sprinkle the affected areas with crushed charcoal or ash.
- Maintain optimal temperature and humidity conditions.
- When watering, avoid getting water on the plants.
- You can try to treat the affected areas with a mixture of one glass of wood ash and a teaspoon of copper sulfate.
- If the effect is insufficient, treat the plants with fungicides.
- If the disease progresses, cut off severely affected shoots and destroy plant debris.
white rot on cucumbers
Fungal disease. White plaque causes rotting of fruits, stems and petioles, drying of leaves.
What to do if white rot is found on cucumbers?
Remove the affected areas, capturing healthy tissue.
The main pests of cucumbers: identify and treat
Aphids on cucumbers
Shoots are bent and slow down growth. Leaves wrinkle. Small insects sit in clusters on the tops of the shoots and on the underside of the leaves.
Aphids on cucumbers>>>
What to do if aphids are found on cucumbers?
Spray with insecticides or pyrethrum infusion. Pull out the weeds.
Tobacco thrips on cucumbers
Small, about 1 mm in size, insects and light angular spots appear on the leaves. With the development of the lesion, the foliage turns brown and dries. Thrips help spread the mosaic virus.
What to do if thrips are found on cucumbers?
Spray plants with insecticides. Preventive measures – regularly dig and loosen the soil, destroy weeds.
Spider mite on cucumbers
Ticks predominantly live on the underside of leaves. They braid them with a thin web and suck the juice out of them. First, whitish dots form on the leaves, then they become larger, turning into spots. Eventually the leaves turn yellow and dry up.
Spider mite on cucumbers>>>
What to do if there is a spider mite on cucumbers?
Spray with acaricides, paying special attention to the underside of the foliage.
Although technically a fruit, cucumbers are used as a vegetable.
