What are the key management points during the coloring stage of Shatang mandarin?
Shatang mandarin is a relatively popular variety among citrus fruits, with plenty of juice and a sweet taste. When Shatang mandarin enters the coloring stage, management at this time is extremely important, as it relates to its quality and commercial value. So how should Shatang mandarin be managed during the coloring stage? Let's take a look.
1. Spraying foliar fertilizer
In order to increase single-fruit weight, promote fruit coloring, increase fruit sweetness, and improve quality, and also to prevent pre-harvest fruit drop, you can spray potassium dihydrogen phosphate foliar fertilizer and 0.01% Daguangming Tianfengsu at the beginning of the coloring stage. When the fruit just begins to change color, spray once every 10 days for 2-3 consecutive sprays. The effect of increasing yield and quality is obvious.
2. Strengthen pest and disease control
The main diseases during the coloring stage of Shatang mandarin include anthracnose, scab, and stem-end rot, while the main insect pests include red spider mites, noctuid moths, and stink bugs. These pests and diseases can all cause pre-harvest fruit drop and pose a huge threat to yield. Corresponding pesticides can be used for spraying, but attention should be paid to the concentration of the pesticides and the alternating use of pesticides to avoid pesticide resistance. In addition, spraying should be stopped one month before harvesting to avoid pesticide residues that endanger human health.
3. Increase the application of organic fertilizer
During the coloring stage of Shatang mandarin, attention should be paid to fertilization at this time. Excessive fertilizer should not be applied, so as to avoid excessive vegetative growth, which is extremely unfavorable for fruit coloring. The correct fertilization method should be based mainly on organic fertilizer, with an appropriate combination of some trace elements, to promote fruit coloring and nutrient accumulation in the tree body. Generally calculated according to yield, for high-yield trees over 5 years old, apply 100 kg of cake fertilizer, 200 kg of farmyard manure, and 50 kg of superphosphate per mu. During fertilization, pile them together, fully decompose them, and then apply.
4. Root cutting to promote flowering
Starting from mid-November, the entire orchard should be cultivated, with appropriate exposure of roots to the sun. A hoe can be used to turn over the soil clods. When hoeing the soil and applying medicine, note that shallow hoeing should be done near the trunk. When thick roots are encountered, stop forced turning of the soil immediately. Hoe 15-20 cm at a distance from the trunk. After hoeing, do not break up the soil, and let it be exposed to the sun for a period of time. At the same time, appropriately control watering so that the plant has slight curling on sunny days, which is suitable.
The above is an introduction to the key management points during the coloring stage of Shatang mandarin. We hope it can help you. To learn more related knowledge, please stay tuned to us.