A Full Analysis of the Causes of Flower and Fruit Drop in Schisandra chinensis and the Control Measures
Schisandra chinensis is a traditional Chinese medicinal herb with extremely high medicinal value and the effect of strengthening the body, but in the process of cultivating Schisandra chinensis, flower and fruit drop often occurs, seriously affecting the yield of Schisandra chinensis. So what are the causes of flower and fruit drop in Schisandra chinensis? How should it be prevented? Let's take a look at the detailed introduction together.
1. Low temperature
During the flower bud differentiation period of Schisandra chinensis, if it encounters a cold air mass or cold wave, it will cause physiological cold damage, leading to the shedding of some flower buds.
Control measures: For low-temperature cold damage, 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 appropriate time to reduce the impact of low-temperature cold damage.
2. Herbicides
In April to 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 a relief agent.
3. Diseases and insect pests
The main diseases of Schisandra chinensis include root rot, leaf blight, and powdery mildew, which can cause fruit drop when the disease is severe; while insect pests include leaf roller worms and foam cicadas, which mainly cause damage from May to August and can also cause fruit drop when severe.
Control measures: The control of diseases and insect pests 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 insect pests, spraying with deltamethrin emulsifiable concentrate and omethoate emulsifiable concentrate can be used 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: Carry out topdressing and irrigation 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 discharge 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 in Schisandra chinensis fruits, causing them to fall off.
Control measures: Schisandra chinensis plantations should be far away from pollution areas and roads, and should be built according to pollution-free production standards with standardized cultivation. At the same time, reduce the use of pesticides and chemical fertilizers, and promptly control phytotoxicity caused by acid rain.
The above is an introduction to the causes of flower and fruit drop in Schisandra chinensis and the control measures. I hope it can help you. If you want to learn more related knowledge, please follow us.