What are the pest and disease control methods for Schisandra chinensis
Schisandra chinensis, also known as Xuanji, Wumeizi and Shanhua, gets its name because the different parts of its fruit have varied flavors. It is a traditional Chinese medicinal herb with high medicinal value and the effect of strengthening the body. It is now planted all over the country, and during cultivation it is often harmed by pests and diseases that affect its growth, yield and returns, giving growers great headaches. Let us take a look below at its pest and disease control methods.
1. Yellow leaf disease
Yellow leaf disease mainly harms the leaves of the plant, and moreover the new leaves. Often not long after the new leaves have just grown out, they gradually turn yellow until, after the vines extend, the tips die, causing the leaves to lose normal photosynthesis and greatly affecting the growth of Schisandra chinensis.
Control method: When yellow leaf disease occurs, Huangyeling can be diluted 250 times with water and sprayed, once every ten days to half a month, with excellent results. In addition, it can also be used together with thiophanate-methyl and mancozeb.
2. Leaf blight
Leaf blight is a very common pathogen in Schisandra chinensis production. It is a fungal disease, generally breaking out from May to July. When the disease occurs, the leaf tips or edges begin to wither and gradually spread to the entire leaf surface, ultimately causing the whole leaf to wither and fall off. It also affects the fruit and causes early fruit drop.
Control method: Biological pesticide validamycin aqueous solution can be diluted with water and sprayed once every week, or thiophanate-methyl and mancozeb can be sprayed for control.
3. Powdery mildew
Powdery mildew is also a common disease of Schisandra chinensis. It generally occurs in June and can also break out together with black spot disease. When the disease occurs, irregular diseased spots appear on the leaves, and in the later stage of the disease white small granular substances appear on the diseased spots.
Control method: Lime sulfur mixture, or triadimefon and thiophanate-methyl, can be sprayed for control. If the disease is relatively severe, triadimefon can be used together with mancozeb for combined control, with the concentration prepared according to the size of the plant and the severity of the disease.
4. Leaf roller
The leaf roller damages with its larvae, mainly harming leaves and also harming fruit. Three days after hatching, it gnaws on leaves and spins silk to roll the leaves, causing the plant's leaf photosynthesis to weaken and preventing effective synthesis of nutrients, resulting in poor plant growth. In severe cases, it can also cause early fruit drop and affect yield.
Control method: For leaf rollers before the larvae are three days old, trichlorfon can be sprayed to kill them, while for three-day-old leaf rollers, the systemic insecticide dimethoate oil should be sprayed for control.
The above are the pest and disease control methods for Schisandra chinensis. We hope they can help you. To learn more related knowledge, please follow us.