Yellow leaves of Osmunda japonica, control

The first reason why Lagerstroemia indica leaves turn yellow is that plants are undergoing normal metabolism. In this process, due to the natural consumption of nutrients, the leaves of the plant itself will gradually turn yellow and fall off, which is a normal phenomenon in the growth process of Lagerstroemia indica. Solution: If this happens, you don't need to worry. If we continue to do a good job in the normal and reasonable maintenance and management of osmanthus fragrans, we can spend it safely.

Reason 2: Too much watering.

Lagerstroemia indica has a strong drought resistance. The soil moisture caused by excessive water will make it difficult for roots to absorb enough oxygen and weaken, so that nutrients cannot be transferred to leaves, resulting in yellow flowers on leaves. Solution: Always adhere to the principle of "just do it without watering", especially in rainy season, take effective drainage measures to avoid root rot.

Reason 3: powdery mildew invasion

Powdery mildew is a disease that most plants will suffer during their growth, and Lagerstroemia indica is also an important infection object. The leaves of Lagerstroemia indica infected with powdery mildew will gradually turn yellow and eventually fall off, which seriously affects the growth of plants and the normal ornamental effect of Lagerstroemia indica. Solution: First, do daily maintenance. Healthy growth can improve the disease resistance of plants. In order to prevent the onset of diseases in the growing period, 80% zineb WP500 times, 70% thiophanate-methyl WP 1000 times, 20% triadimefon EC 1500 times and 50% carbendazim WP800 times can be sprayed.