Causes and control methods of tangerine leaf curling with the latest sugar
Sugar orange roll leaf is a common phenomenon in winter and spring, many fruit farmers will encounter this situation, some farmers do not know where to start, miss the best prevention and control period, so caused bad losses. The following editor brings you the causes of sugar orange leaf rolls and control countermeasures, along with the editor to understand it.
1. Environmental factors
It is rainy in spring, the orchard is low-lying, there is more stagnant water on the ground, and the soil water content is too much, resulting in poor breathing of sugar orange roots, thus affecting the root system to absorb water. With a long time, the leaves will curl and turn yellow because of water loss.
Prevention and control methods: dig the drainage ditch deeply, make the drainage ditch more than 80 cm from the surface, reduce the soil water content, loosen the soil, increase the oxygen content, and cover the root surface with straw or straw. reduce Rain Water's scouring of the soil on the root surface and reduce the root damage. Finally, the leaves were sprayed with brassica lipid to improve stress resistance.
2. Insect pests
Aphids cause harm to new shoots, resulting in insufficient supply of nutrients, thus affecting leaves and making them yellow and rolling leaves. In addition, summer and autumn is the peak period of red spiders, which will harm leaves, shoots and fruits, resulting in leaves yellowing and shedding.
Prevention and control methods: the harm of aphids can be sprayed with acetamiprid or other spraying to protect new shoots. Red spiders can be sprayed with sweeping mites or propargite to control red spiders.
3. Element deficiency
The biggest reason for sugar orange leaves yellowing, thinning and rolling leaves is due to nitrogen deficiency, nitrogen deficiency mainly occurs on the old leaves, the new leaves are better, the leaves as a whole yellowing, the initial nitrogen deficiency, the leaves will become light green, and then turn yellow. In addition, the lack of nitrogen fertilizer will further lead to iron deficiency in sugar orange.
Control methods: strengthen management, increase the application of organic fertilizer, if the element deficiency is serious, it can be combined with external fertilization, spray low concentration urea and potassium dihydrogen phosphate every 10 days, and add borax to fertilizer water at the same time. If there are symptoms of iron deficiency, other elements should be added to it. if it is caused by root damage, foliar fertilizer should be replenished and care should be paid to the roots of sugar tangerines.
4. Improper management
In the first year, spraying too high concentration of foliar fertilizer, plant growth regulators and pesticides on the leaves will cause some damage to the leaves, and will also cause the phenomenon of leaf curling in the second year.
Control methods: straw can be used to cover the roots to prevent sunlight damage to the roots, suspend root fertilization, wait until the new shoots are mature, adopt the principle of frequently applying thin fertilizer to promote the growth of the roots. After the new leaves unfold, but do not turn to thick green, foliar fertilizer is sprayed to absorb nutrients by roots and leaves, and promote the recovery of tree potential.
The above is the introduction of sugar orange leaf roll causes and control methods, hope to help you, want to know more related knowledge, please pay attention to us.
- Prev
The latest causes of Sugarcane lodging and Preventive measures
In the process of planting sugarcane, farmers often encounter the phenomenon of sugarcane lodging, which is extremely disadvantageous to the growth of sugarcane, and there may be a large area of dead plants. So what is the cause of sugarcane lodging? Let's get to know it with the editor.
- Next
Causes of wilting and dead seedlings of muskmelon and its control measures
In the process of muskmelon planting, the grafted seedlings in greenhouse in early spring are prone to acute wilting and death, light or small area, and even no harvest in individual fields, which seriously affect the planting efficiency of muskmelon. So what is the cause of muskmelon wilting and dead seedlings? How to prevent it?
Related
- A course of planting techniques and methods on how to grow carrots
- How to plant the latest tulips?
- Is it better to pick tea in the morning or in the afternoon? When is the best time for tea to be picked? what is the third or fifth tea?
- Launch Yuanxiao Happy combination Haocha + Tea Yuan healthy Taste
- Penghu Tourism "Fireworks 20 Parade with You"
- 2022 West Lake Happiness holds "Digital Revitalization Voucher" and draws iphone13 and laptop.
- Banqiao Fuzhou social houses are designed to change start-up combined with police elimination to create a safe and livable environment
- The convenient measure of "mechanical weeding" in Xinbei has been abused and the Agriculture Bureau has imposed heavy penalties on the illegal land consolidation.
- Changgeng University Joins Hands with Four Memory Factories to Rescue Memory Talent Shortage
- The list of Taiwan's top 100 MVP managers is listed by the Director-General of the Farmers' Association of Sanxia District.