What are the pests and diseases of osmanthus
You may not know about the pests and diseases of osmanthus and the explanation of common pests and control methods in the green plants and flowers. Next, let's learn about it together.
Osmanthus is a traditional flower loved by Chinese people. It is often seen outside and is a good plant for greening. In addition to its upright posture and green leaves, it is fragrant and the aroma can spread for miles during the flowering period. However, this plant is prone to pest and disease infections. Today, I will introduce to you the pests and diseases of osmanthus and how to prevent and control them.
I. Anthracnose
Many plants are susceptible to anthracnose, and if osmanthus is infected with this disease, some brown spots will appear on the leaves, and then the lesions will gradually enlarge and the edges will turn reddish-brown. It is most likely to occur in May and June, and Bordeaux mixture can be used for prevention and control. In addition to the tree body, the ground soil should also be sprayed with chemicals for disinfection.
II. Leaf Blight
If the osmanthus tree is infected with leaf blight, some small brown round spots will appear at the tip of the leaves, and then the round spots will slowly turn gray-brown. It is prone to occur in the second half of the year, and it can be spread not only by wind but also during watering. Potassium permanganate can be used for treatment, and喷药 prevention should start from June.
III. Whitefly
In terms of pests, osmanthus trees are easily invaded by whiteflies. This pest is very small, but it reproduces very quickly and will eat the leaves of the osmanthus tree. It is important to detect and control it early. If it can be treated with dichlorvos emulsion during the egg hatching period, the effect will be good. If the eggs have grown into adults, then dichlorvos or malathion emulsion can be used for control. Regular pruning of the osmanthus tree branches and leaves should be noticed to avoid being too dense, allowing the plant to be more ventilated and well-lit.
IV. Sooty Mold
This disease occurs frequently in stuffy and poorly ventilated environments. There will be a layer of gray-black powdery substance on the leaf surface and branches, which will not only affect the ornamental value of osmanthus but also affect the photosynthesis of the leaves. Therefore, it is necessary to prune the osmanthus in time to keep the branches ventilated and promote plant growth. If there are pests such as aphids, they should be eliminated in time. A suspension of sulfur 500 times or 50% carbendazim wettable powder 800 times can be used.
V. Chlorosis
It is mainly caused by iron deficiency. The specific performance is the yellowing of young leaves or both old and new leaves, and the plant cannot grow normally. If it is mild, 0.5% ferrous sulfate solution can be applied at the root; if severe, 20-40 grams of chelated iron can be applied to the surrounding soil, and 0.1% chelated iron solution can be sprayed on the leaves.
The above sharing of the pests and diseases of osmanthus and the specific content of the common pests and control methods of osmanthus, if it can bring you help, remember to visit the website often!