What is the reason why lotus leaves turn yellow and rot?

The yellow rot of lotus leaves can be caused by the following reasons:

1, insufficient light. When the lotus leaves grow up, they need to be supplemented with fresh water gradually to meet the needs of photosynthesis when the leaves float on the water.

What's more, if photosynthesis is poor and nutrient absorption can't keep up, the leaves will turn yellow and wither.

2, lack of fertilizer, insufficient nitrogen fertilizer is easy to yellow leaves, and it is necessary to balance the proportion of elements when fertilizing.

3. Yellowing disease, which may be spread by lotus seeds or aphids, will lead to wrapping, fading, yellowing and atrophy of lotus leaves.

Rough, etc. Attention should be paid to the prevention and control of aphids when handling.

4, rot disease, the initial leaves are light green, dry from the edge, and then the whole leaves are curled and dried, and 0.5 kg of 75% chlorothalonil can be added.

Mix 30 kg of dry soil, sprinkle it into shallow water field, and spray it on the lower part of lotus leaf stem for treatment.

5. Fusarium wilt, sewage, soapy water, etc. Discharge into the pond will cause the lotus leaf to wither and die.

6, herbicides, lotus leaves are very sensitive to herbicides, contact with herbicides will wither. Lotus plants of the family Nelumbo.

Its diameter can reach 60 cm, its leaves are shield-shaped or round, its surface is dark green, covered with waxy white powder, and its back is gray-green and wavy. Petiole cylindrical, densely barbed. Has great medicinal value and edible value. Sex likes warmth and water. Distributed in Central Asia, West Asia, North America, Indian, China, Japanese and other subtropical and temperate regions.

It is best to have big, clean and green leaves. The stem of lotus leaf is green, covered with small thorns, like an umbrella handle; If you break the stem of the lotus leaf, there will be many connected filaments on the stem.

Numerous micron-sized waxy papillae structures are attached to the surface of lotus leaves. When observing these papillae with electron microscope, we can see that many nanoparticles with similar structures are attached to the surface of each micron-sized papillae, which scientists call the micro-nano dual structure of lotus leaf. It is these tiny double structures that make the contact area between the lotus leaf surface and water droplets or dust very limited, so there is a phenomenon that water droplets roll on the leaf surface and take away dust. Moreover, water will not stay on the surface of lotus leaf, which is a perennial aquatic plant of Nymphaeaceae with roots. It likes warmth and water, but water can't drown lotus leaves. When the water temperature is not lower than 5℃, the seed lotus begins to germinate at 8- 10℃, the lotus root whip grows at 14℃, the lotus root accelerates to grow at 23-30℃, and the leaves and pedicels are pulled out to blossom. In the growing period, it needs sufficient sunshine and needs to grow in shallow water with a water depth of 50-80 cm and a small flow. Lotus likes to grow in fertile, slightly acidic and organic roots.