What are the key management points during the coloring stage of Shatang mandarin? Latest technology explained in detail
The Shatang mandarin is one of the more popular citrus varieties, with lots of juice and a sweet taste. When the 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 the coloring stage of Shatang mandarin be managed? Let's take a look together.
1. Spraying foliar fertilizer
In order to increase single-fruit weight, promote fruit coloring, increase fruit sweetness, 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 has just begun 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 are anthracnose, scab, and stem-end rot, while the main insect pests are 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 alternating their use to avoid developing resistance. In addition, spraying should be stopped one month before harvest to avoid pesticide residues and harm to human health.
3. Apply more organic fertilizer
During the coloring stage of Shatang mandarin, attention should be paid to fertilization at this time. Excessive fertilizer should not be applied, to avoid excessively vigorous vegetative growth, which is extremely unfavorable for fruit coloring. The correct fertilization method should be mainly organic fertilizer, with an appropriate amount of some trace elements mixed in, to promote fruit coloring and nutrient accumulation in the tree. Generally calculated according to yield, for high-yielding 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 whole orchard should be cultivated, with appropriate exposure of roots to the sun. A hoe can be used to turn over soil clods. When hoeing soil and applying medicine, note that near the trunk you should hoe shallowly. When you reach thick roots, stop immediately and do not force the soil to be turned. At a certain distance from the trunk, hoe 15-20 cm, and after hoeing do not break up the soil; let it be exposed to the sun for a period of time. At the same time, appropriately control water so that the plant has slight curling on sunny days.
The above are the key management points for the coloring stage of Shatang mandarin. We hope this can help you. To learn more related knowledge, please stay tuned to us.