1, insufficient light. When the lotus leaves grow up, they need to be gradually filled with clear water to meet the needs of photosynthesis. If photosynthesis is poor and nutrient absorption cannot keep up, the leaves will turn yellow and wither.

2, lack of fertilizer, insufficient nitrogen fertilizer is easy to yellow leaves, and attention should be paid to element balance when fertilizing.

3, yellowing disease, may be caused by lotus seeds or aphids, yellowing disease will lead to lotus leaves wrapped, chlorosis, rough shrinkage and so on. Attention should be paid to the prevention and control of aphids.

4, rot, the leaves are light green at first, dry from the edge, and then the whole leaves curl and dry. 0.5 kg of 75% chlorothalonil and 30 kg of dry soil can be mixed evenly, then sprinkled in shallow water fields and sprayed on the lower part of lotus leaf stems 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 leaf tea has the effects of clearing away heat, relieving summer heat, lowering blood pressure and diuresis, reducing blood fat and losing weight, and is suitable for treating summer heat, polydipsia, headache, dizziness, edema, vomiting due to blood heat, bloody stool and obesity.

Lotus leaf is bitter in taste and cool in nature. It has the functions of clearing away heat and relieving summer heat, clearing heart fire, purging liver, purging spleen and reducing lung fire, and is suitable for treating summer heat and polydipsia.

Drinking lotus leaf tea regularly can induce diuresis, eliminate edema, dilate blood vessels, lower blood pressure, and treat abnormal water metabolism, edema of lower limbs and hypertension.

Lotus leaf tea can also strengthen lipid metabolism, make the stomach unobstructed, expel toxins from the body, achieve the effect of slimming, and easily maintain a beautiful curve. Obese people can often drink lotus leaf tea.

Lotus leaf contains a variety of effective lipid-lowering alkaloids, which can effectively decompose body fat and excrete it. It has the functions of lowering blood lipid and cholesterol, and has certain curative effects on hyperlipidemia, atherosclerosis and coronary heart disease.

Lotus leaf contains nuciferine, which will stimulate the intestine and promote bowel movements. People with signs of constipation can drink it every day to make their stools unobstructed.