1, fat loss. In fact, the leaves are a little white, and it is judged as a non-communicable disease. The base fertilizer is too large, or the fertilizer is applied to the roots. Leading to fertilizer damage and white leaves.
2. Some leaves are perforated in the middle, which may be pests, most likely thrips. The way to find thrips: use a piece of white paper, pour the cucumber leaves aside, pat them gently, and put the white paper under the cucumber. See if there are thrips on the white paper.
3, your cucumber seedlings are not bought in the market, so it will bring many pests and diseases.
If the edge of the leaves is yellow, it is too much fertilization. We can prevent the leaves from turning yellow by reducing fertilization and watering.
If a large area is pale yellow, it means that fertilization is too little, and the dosage can be increased when fertilizing.
If some leaves turn yellow, it may be caused by the non-conformity of the soil, because some places are not suitable for planting the soil cultivated by cucumber, so if the leaves turn yellow, it is necessary to prescribe the right medicine.
During the normal growth of cucumber, the leaves will turn yellow for various reasons. Generally, the yellow leaves of cucumber lacking nutrition are divided into two situations: the middle and lower old leaves turn yellow and the middle and upper young leaves turn yellow.
Downy mildew is a common and serious disease in cucumber growth period, which mostly occurs at seedling stage, then leaves turn green and yellow, and finally die. In the early stage of Fusarium wilt, some leaves wilted at noon, which could be recovered sooner or later. After repeated several days, it still failed to recover, and finally the whole plant died.
That's all I said. I hope it helps you.
Methods to solve the yellowing of cucumber leaves
1, increasing nutrition cucumber is one of the common vegetables in life. What should I do to plant cucumber leaves? First, we need to supplement nutrition in time, promote plant development, and avoid malnutrition, thus causing leaves to turn yellow.
2, reduce fertilization cucumber is not strict with fertilizer requirements, and the number of fertilization should be strictly controlled. If fertilization is too frequent, the soil concentration will rise, the roots will burn, the normal respiration of the roots will be affected, and the leaves of plants will begin to turn yellow.
3. Replenishing water The temperature of cucumber is high during its growth, and the requirement for water is strict. In the process of maintenance, it is necessary to replenish water in time and keep the soil moist as much as possible, which is conducive to better absorption by roots. If the soil is dry for a long time, plants will grow poorly due to lack of water.