What Diseases and Pests Affect Murraya exotica
The editor will answer questions about the diseases and pests that affect Murraya exotica and introduce the green plant and flower care methods for preventing and treating these issues. Next, the editor will provide an introduction.
Murraya exotica, also known as "moon orange," is native to Taiwan, Fujian, Guangdong, Hainan, Guangxi, and other regions. Murraya exotica is a small tree that can grow up to 8 meters tall. With its graceful posture, white and fragrant flowers, it holds high ornamental value. Let's talk specifically about the prevention and treatment methods for the diseases and pests that affect Murraya exotica.
1. Powdery Mildew
Powdery mildew commonly occurs on the leaves, primarily affecting the plant's foliage. Initially, small yellow spots appear on the leaf surface, which gradually expand, and white powdery substances also appear on the leaf surface. In severe cases, it can cause the plant to stop growing or fail to bloom and produce fruit. This can be controlled by spraying fungicides such as pyraclostrobin and methyl thiophanate.
2. Twig Borer
The twig borer primarily affects the plant's branches and can cause the branches to weaken and break easily, eventually leading to gradual death. Twig borers are more common in autumn. During the growing season of Murraya exotica, it is essential to frequently inspect the branches. When feces are found on the plant, locate the wormholes immediately and then use cotton soaked in a small amount of dichlorvos to plug the holes. During the egg-laying season of the twig borer, insecticides like lesiban can be sprayed on the branches every 7-10 days, with 2-3 consecutive applications to effectively kill the larvae.
3. Red Spider Mite
Red spider mites primarily affect the plant's leaves by absorbing nutrients from the leaves to survive. This can lead to malnutrition in the plant, causing the leaves to turn yellow and fall off. During hot and dry periods, it is important to inspect the leaves. When red spider mites are found on the leaf surface, spray 1000 times the concentration of lesiban insecticide, every 10-15 days, with 2-3 consecutive applications. For Murraya exotica potted plants at home, a 25-30 times dilution of red pepper solution can be used for control.
4. Leaf Roller and Aphids
Leaf rollers and aphids primarily affect the plant's tender leaves, causing the leaves to curl and die, which affects leaf growth. During the growth period of tender leaves, control can be achieved by spraying an 800 times dilution of dichlorvos solution. For home-grown Murraya exotica, manual removal can be used for control.
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