Causes and treatment of yellow leaves of Lagerstroemia indica

There are three reasons for the yellow leaves of Lagerstroemia indica: if the leaves are yellow because of natural aging, don't worry, just continue to do normal maintenance work; If it is because of too much watering, you should take off the pot and cut off the rotten roots before planting. Don't water it if you don't do it every day. If yellow leaves are caused by powdery mildew, attention should be paid to prevention and treatment, and specific drugs can be sprayed for treatment.

1. Natural ripening

Reason: Metabolism is the most common phenomenon in plant growth, and yellowing of leaves is one of the typical manifestations of plant metabolism. Because there will always be some leaves that start to turn yellow and then fall off because of the depletion of nutrients, which is normal.

Measures: If it is natural aging, don't worry too much. You just need to trim the yellow leaves in time and then continue the normal maintenance.

Overwatering

Reason: Lagerstroemia indica is drought-tolerant. If it is watered too much, it will form stagnant water, so that the nutrients in the soil cannot be absorbed from the root system, and the normal nutrient transfer cannot be completed. Finally, the leaves will turn yellow.

Measures: Too much watering is easy to rot the roots, so cut off the rotten parts and replant them in another pot. Watering crape myrtle should also adhere to the principle of not doing or watering, and it should be watered thoroughly to ensure that there will be no water accumulation. Pay attention to drainage in rainy season every year to avoid root rot.

3. Powdery mildew

Reason: There are many common diseases in plant growth, powdery mildew is one of them, and Lagerstroemia indica is more susceptible to powdery mildew. The invasion of powdery mildew will make the leaves of Lagerstroemia indica wither and turn yellow, and then gradually fall off, which will affect the growth of the plant and hinder appreciation.

Measures: In view of the disease problems, we should do a good job of maintenance and prevention at ordinary times, such as spraying 500 times solution of zineb WP with 80% concentration and 800 times solution of carbendazim WP with 50% concentration.