What if the leaves of lotus turn yellow and black? how to fertilize the lotus

Wanlian is a kind of temperature-loving plant, which grows best and blossoms the most in a sunny and warm environment. The ornamental value of bowl lotus is very high, so it attracts a lot of people to breed, but in the process of breeding, some people will have the phenomenon of yellowing leaves because they do not master their breeding skills. In fact, they want to solve this situation. There are some ways.

What if the leaves of lotus turn yellow and black?

1. Turn the basin and change the soil. If the water is fertilized too much, you should immediately change the water. Be careful not to change it all at once, half at a time, and reduce the concentration of fertilizer and water in the water. When changing water, the temperature difference of water should not be too large, so as not to change the acidity and alkalinity and affect the water absorption of leaves. In addition, if you apply too much fertilizer, you can turn the basin and change the soil. If the water quality is dirty caused by the blackening of the leaves, it is recommended to turn the basin and change the soil directly, not to change the water directly, otherwise the change of water temperature and acid-base will aggravate the disease. The correct way is to add isothermal water after the water evaporates less. Pay attention to the growing season of bowl lotus must not be short of water, otherwise the leaves are easily scorched.

2. Outdoor maintenance. In addition to winter, try to keep outside the house during the day, bask in the sun, but avoid direct glare. Pruning and cleaning bowl lotus leaves are very easy to occur during the growing period, so cut off the bad leaves in time, disinfect and sterilize with carbendazim, or spray with appropriate amount of diluted pesticides. Rotting lotus seeds and burning seedlings will also blacken the leaves, so you can pull out those lotus seeds that are rotten and sick.

How to fertilize bowl lotus

1. Base fertilizer. Base fertilizer is a certain amount of fertilizer applied when plants are planted. However, because the bowl lotus is not tolerant to fertilizer at the initial stage of growth, overnutrition may cause the bowl lotus to die, so during cultivation, you can not apply base fertilizer or apply a small amount of rotten liquid fertilizer as base fertilizer, and be careful not to produce fertilizer damage.

2. Topdressing. In fact, the most important fertilization work of bowl lotus is topdressing. When the lotus slowly survived and began to grow normally, the matrix in the soil itself was almost consumed. Bowl lotus needs topdressing to ensure its normal growth, otherwise it will senescence the leaves and affect the flowering. When applying fertilizer, you can put a small piece of raw bean cake into the mud of a bowl of lotus, let it slowly ferment, so that the root of lotus root slowly absorb nutrients, you can also use rotten bean cake or manure as topdressing.

What if the bowl lotus is rotten?

1. Disease-resistant varieties should be selected according to local conditions, and seed selection must be pure. Turn the soil in time to increase the permeability of the soil and sprinkle some lime appropriately.

2. Before planting, the lotus root was sprayed with carbendazim or thiophanate-methyl solution, then sealed with plastic film for 24 hours, taken out and dried before transplanting.

3. Fertilization should be timely and appropriate, mixed application of organic fertilizer and chemical fertilizer, and the amount of water should be controlled at different stages of lotus root growth, suitable depth and moderate water temperature.

How to control insect pests in lotus bowls

1. Nocturnal moth. In the larval stage, the combination of artificial capture and drug contact can be used to kill. The mixture of trichlorfon crystal and dichlorvos was sprayed with 1600 to 2000 times of water, contact and fumigation, the effect was good, the adults of night moth were dormant during the day and had strong phototaxis. Trap and kill with electric shock black light at night, put a water basin with kerosene under the lamp, the effective radius can reach 50 meters, each lamp can trap hundreds of night moths and other pests, the effect is very good.

2. Pests in water. In summer, the water in the basin is easy to breed small red worms and water earthworms, which endanger the floating leaves and roots of lotus flowers. Half a piece of trichlorfon in each pot can be wiped out. Potted lotus orchard combined with fertilization, the content of 3% carbofuran and granular fertilizer mixed and applied into the basin, can be controlled.

The cause of yellowing of lotus leaves is generally caused by soil, moisture, temperature and so on, so it is necessary to find out the cause of this situation from the root, and then solve it thoroughly. Bowl lotus is also vulnerable to insect pests, so pest control is also very important.