How to manage citrus in April
The web tells everyone about how to manage citrus in April and the experience of detailed methods for maintaining and managing citrus in April, specifically introducing as follows:
1. How to reduce the second physiological fruit drop, if it is a normal ordinary沃柑, after the first spray, the young fruit turns green quickly and the fruit is separated normally, under normal conditions, the fruit setting rate of ordinary沃柑 is usually very high, and cytokinin + calcium fertilizer can be used to enhance the fruit preservation effect.
If the young fruit of ordinary沃柑 is weak and yellow after the flowers fall, and it is difficult to turn green, it is necessary to apply the second protection in advance. The second protection is generally applied 7-10 days after the first protection depending on the situation. According to the degree of greenness of the young fruit, if the young fruit does not turn green after the first protection, the second protection should be sprayed immediately. If the young fruit does not turn green and does not separate fruit, it is still necessary to apply 920, combined with cytokinin and amino acids, to reduce physiological fruit drop.
If it is seedless沃柑, the second fruit protection medicine still needs to use gibberellic acid because the fruit drop situation of seedless沃柑 is always unstable and keeps falling, which requires gibberellic acid to sustain life. You can use gibberellic acid + cytokinin + calcium because the second protection is the peak period of calcium requirement throughout the year.
2. Fruit preservation by girdling, the organic nutrients produced by photosynthesis in leaves are transported to the underground part through the phloem to meet the needs of root growth; the moisture and mineral nutrients absorbed by the roots from the soil are transported to the above-ground part through the xylem to meet the needs of tree growth and development. The main principle of fruit preservation by girdling, stripping, and binding is to manually damage the phloem to hinder the transport function of the phloem sieve tube. On one hand, it affects the transport of organic nutrients produced by leaf photosynthesis to the roots, inhibits root growth, and limits the absorption function of the roots, reducing the mineral nutrients, moisture, and hormones promoting growth absorbed by the roots, thereby controlling the tree's nutritional growth and reducing nutrient consumption. On the other hand, the organic nutrients produced by leaf photosynthesis cannot be transported to the roots, thereby increasing the accumulation of organic nutrients in the tree and providing more nutrients for fruit growth and development, which is beneficial for fruit preservation.
The best time for girdling is when the spring shoots are 80% mature. At this time, a circle or several circles can be stripped around the phloem (bark) of the trunk or branches, which can effectively reduce fruit drop. After the stripping treatment, as only the phloem is cut and the xylem is not damaged, the transport of organic nutrients downwards is blocked, causing the photosynthetic products to accumulate in the branches and leaves above the stripping site, increasing the concentration of carbohydrates in these branches and leaves, changing the nutrient and hormone balance in the branches and leaves above the stripping site, and promoting the flow of nutrients to the fruit, which improves the nutritional level of young fruit and is beneficial for fruit preservation. The specific method is: after the flowers fall, strip a circle on the trunk or branches to effectively increase the fruit setting rate.
3. Preventing fruit ulcers, in April, according to Nanning's weather, the period of ulcers also arrives, which is a key period for preventing ulcers on young fruit! Because once ulcers are on the fruit at this time, it is difficult to manage later.
It is also dangerous for spring shoots because the ulcer bacteria only infect young tissues at a certain development stage. The infection of ulcers has already started on the tender shoots that have just emerged. With the growth of new shoots, the incidence rate increases until the new shoots mature, the leaves fully extend and self-prune, the stomata form the most, and are in an open phase, making it easier for the bacteria to invade and reach the highest peak of disease occurrence. After the spring shoots mature and the leaves are fully lignified, the stomata close, making it difficult for the bacteria to invade.
I personally recommend using inorganic copper to prevent and control at this time. You can use copper高尚, copper sulfate calcium, Wangtong Metazole, and Chunlei Wangtong. The effects of organic copper and antibiotics are not very ideal, and the inorganic copper must be strengthened.
The above is[] about how to manage citrus in April and the detailed methods for managing and maintaining citrus in April, for the reference of green plant enthusiasts, hoping to solve your problems in green plant and flower management.