Causes of flower and fruit drop in Schisandra chinensis and how to prevent and control it
Schisandra chinensis is a traditional Chinese medicinal herb with extremely high medicinal value and the effect of strengthening the body, but flower and fruit drop often occurs during the cultivation of Schisandra chinensis, seriously affecting its yield. So what causes flower and fruit drop in Schisandra chinensis? How should it be prevented? Let's take a look at the detailed introduction.
1. Low temperature
During the flower bud differentiation period of Schisandra chinensis, if cold air or a cold wave is encountered, it will cause physiological chilling injury, leading to the shedding of some flower buds.
Control measures: For low-temperature chilling injury, prevention should be the main approach. Pay attention to weather forecasts. When a cold wave arrives, it can be prevented by smoking. When planting, choose strong seedlings and irrigate at the right time to reduce the impact of low-temperature chilling injury.
2. Herbicides
In April and May, this is exactly the period when Schisandra chinensis is flowering, and it is also the time when weeds are running rampant. In order to eradicate weeds, many farmers often use herbicides to control weeds, but during spraying, if the petals come into contact with the herbicide, the female flowers cannot pollinate normally, causing flower drop.
Control measures: For flower drop caused by herbicides, start from the source. When spraying herbicides, pay attention and do not spray them onto leaves and flowers. When phytotoxicity occurs, promptly spray mitigation agents.
3. Pests and diseases
The main diseases of Schisandra chinensis include root rot, leaf blight, and powdery mildew, which can cause fruit drop when severe; the pests include leaf roller and foam cicada, which mainly cause damage from May to August and can also cause fruit drop when severe.
Control measures: The prevention and control of pests and diseases should be timely. For diseases, prevention should be the main approach with integrated control. Root rot can be controlled by drenching the roots with carbendazim; leaf blight can be controlled by spraying with thiophanate-methyl; for pests, deltamethrin EC and omethoate EC can be sprayed for control.
4. Improper fertilizer and water management
When Schisandra chinensis lacks fertilizer and water, its growth will be inhibited. During long-term drought and fertilizer deficiency, flower and fruit drop will be especially prominent.
Control measures: Topdressing and irrigation should be carried out reasonably. Topdressing should mainly use compound fertilizer and special-purpose fertilizer, and appropriately supplement some trace elements to ensure sufficient nutrients for the plants.
5. Environmental pollution
When plants are in industrial pollution areas, chemical enterprises emit waste gas, acid rain occurs and causes phytotoxicity, and if not controlled in time, flower and fruit drop will occur. In addition, smoke produced by burning coal or burning boilers can also cause carbon poisoning of Schisandra chinensis fruits, causing them to fall off.
Control measures: Schisandra chinensis plantations should be far away from pollution areas and highways, should be built according to pollution-free production standards, and should be cultivated according to standard practices. At the same time, the use of pesticides and chemical fertilizers should be reduced, and phytotoxicity caused by acid rain should be controlled in time.
The above is an introduction to the causes of flower and fruit drop in Schisandra chinensis and control measures. I hope it can help you. If you want to learn more related knowledge, please follow us.