Beginning summer residents do not know why the leaves of eggplants turn yellow in a greenhouse. Out of ignorance of the situation, all plants can be ruined. The main reason for this phenomenon is care errors and non-compliance with the growing conditions of this crop. However, viral and fungal diseases can play a role. Initially, their influence can be seen by the fact that the plant changes the characteristic color of the foliage to a yellow tint. And gradually dies off. So, what are the possible reasons for the appearance of yellowness on the leaves of greenhouse eggplants?
Causes of yellowness on the leaves
It is the yellowness on the lower leaves of the growing seedlings that is evidence that the soil in the greenhouse is poor in useful trace elements and poorly moistened. Nitrogen is an important growth stimulant for eggplant. It is this element that is responsible for the uniform distribution of other beneficial trace elements. Sometimes it happens that eggplant care is carried out according to all the rules (in terms of watering, air, light and temperature conditions), but the lower foliage fades anyway. Then the cause should be sought precisely in nitrogen deficiency.
Eggplant susceptibility to changing growing conditions
Another cause of wilting and yellowing of the lower foliage on a plant is its response to transplanting from a pot to a permanent place in a greenhouse. Subject to all care measures, eggplants will recover over time.
Causes of curling eggplant foliage
Twisting the leaves is another misfortune in this cultivated species. Several factors are known to cause this process.
1. For example, poor lighting can affect this. Then the seedlings should be placed on a well-lit side.
2. Frequent watering can also cause drying and curling of the leaves. The main thing is to water regularly and regularly. But do not overdo it with moisture, from which the roots can rot.
3. A tick that settles on foliage can also cause leaf curl. Room conditions for growing eggplant are also ideal for the appearance of a tick. If possible, seedlings should be transferred to the balcony or transplanted to the beds. But for this, all the frosts that can destroy the landings must pass.
Measures against yellowness and spots on eggplant foliage
Even during the period of growing seedlings, you should take care that there is no change in the color of the foliage in adult plants. It is important to choose the right fertilizer that contains nitrogen. Complex fertilizers will also be needed. As a result, plants will receive all the necessary substances for successful development and growth.
Noticing the presence of yellowness on the lower leaves, you should immediately take action to enrich the soil with nitrogen additives. Then the culture will smell sweet again.
At an early stage of appearance, the spots are microscopic in size. You may need a magnifying glass to see them. In the absence of insects, the cause of the stains may be burns. Here it is advisable to place the plant away from the light source. If the rays of the sun burn the seedlings too much, then it is recommended to shade it with a newspaper or cloth.
If the spots are concentrated along the edges of the leaves and acquire a brownish tint, then this may indicate a lack of potassium. An appropriately selected fertilizer with a deficient element will help here. It is not recommended to water eggplants with too cold water, as this also leads to the formation of spots on the foliage.
Fungal and viral lesions of eggplant foliage
Spotting on the leaves of a culture may be the result of a fungal or viral infection. Which one exactly?
Late blight and gray rot are diseases of a fungal nature. Brown spotting on the lower leaves are the first symptoms of late blight. Gradually, the whole plant begins to blacken. The disease affects all its parts, including the fruits.
A distinctive feature of gray rot is a white coating on the affected areas of the culture. Initially, the plaque has a white color, a characteristic fluffiness. A little later it turns gray, and the plant rots. Moist air and soil, frequent temperature fluctuations are the main risk factors contributing to the development of the disease.
To destroy the fungus, one should adhere to the laws of crop rotation, use special means – Quadris, Antracol, Consento. For preventive purposes, it is recommended to treat plants a week and a half after planting. The last acceptable treatment with the product is at least a week before harvest. A sufficient level of greenhouse ventilation, timely pinching and weeding are additional measures against the development of the fungus.
Spotting on the foliage also occurs due to viral diseases: speckled, cucumber and tobacco mosaics. In order to avoid the appearance of these eggplant ailments, care should be taken to competent crop rotation, regular control of weeds and the remains of other plants. It is important to observe the temperature regime of water, air, soil, not to overmoisten the ground.
If the parasite is wound up in a greenhouse where eggplants grow, it will be quite problematic to remove it without the use of folk methods or special chemicals. Keep this in mind and respond in time to any change in the appearance of your pets.