Citrus orange yellow leaf disease, Huanglong disease, yellowing prevention and treatment:
Citrus huanglongbing can show symptoms in branches, leaves, flowers, fruits and roots, especially in autumn shoots. At the early stage of disease, some new shoots were yellowed and yellow shoots appeared. The yellow tips initially appeared at the top of the crown and then spread gradually. After 1-2 years, the whole plant became ill. The spring shoot symptoms mostly appeared after the leaves turned green. After yellowing at the base of the veins, some of the mesophylls were chlorotic, the veins were gradually yellowing, the leaves were irregularly yellow-green patches, and starch accumulation was observed. The symptoms of summer shoots are mostly not turning green and evenly yellowing at the leaf stage. The leaves harden and lose luster and appear to lack nitrogen. Some veins appear green, and the leaves yellow, showing a fine mesh like iron deficiency symptoms. Some leaves appear on the leaves. Irregular, green spots with indistinct edges. The old leaves on the old branches can also show yellowing. Most of them begin to turn yellow from the midrib and lateral veins. The thickening and hardening of the leaves results in the dullness of the leaves and the swelling of the veins. Some of the swollen veins are broken on the back, and they appear to lack boron. The leaves of Citrus showed mosaic symptoms at the initial stage. The yellow leaves of the new shoots fall off soon, and the diseased leaves on old shoots fall off before they have completely yellowed. In the middle period of onset, that is, at the late stage of shoot growth, the leaf veins and the tissues along the veins turn green; the yellow leaves are yellowish, and the yellowish ones appear to be slightly deficient in manganese, severely yellowed, and deficient in zinc. In the later period, new shoots were difficult to pull out. The symptoms of the leaves were severer than those in the middle period, and most of the leaves were fallen. Branches withered from the top of the dead, the diseased branches of the xylem part or all into orange rose, and finally the whole plant died. In early spring, the disease tree blooms early in the spring, with small malformations, little fruit, abnormal fruit, small fruit like table tennis, uneven coloration, and coloration near the fruit peduncle, commonly known as “red nose fruitâ€. The fruit is sour and has very poor quality. It is the identification of Huanglong. The most typical symptoms of the disease. The symptoms of roots are mainly root rot, and its severity is relative to the shoot on the ground. In the early stages of the onset of foliage, the roots were not rotted, and when the leaves yellowed off, the fibrous roots and roots began to rot. Later, they spread to the lateral roots and the main roots, and the cortex was broken and separated from the xylem.
According to experts from the Huanglongbing disease research center of the Central South Agricultural Technology Development Institute, Huanglongbao's special fertilizer is rich in 13 citrus nutrient elements and vitamins, concentrated natural organic matter, bacterial proteins, nucleic acids, 18 amino acids, and active growth factors. With strong pro-prime, 60% natural organic matter contains carboxyl group, hydroxyl group and other active groups super chelating ability can be transformed into pesticide residues and harmful substances left over from fertilizers to improve the soil environment to improve organic matter content, 1.5 meters strong penetration from deep plowing, enhanced disinfection Sterilize and unblock nutrient screen function, effective nitrogen fixation, phosphate release, activated potassium and balanced trace elements to prevent yellowing of citrus oranges, activate autoimmune disease resistance system to increase chlorophyll content quickly yellowing to green, 30 times to strengthen root growth, Adhesion and absorption capacity, enhance the body's physical structure, increase sugar content, increase yield, reduce pests and insecticides, and reduce the amount of pesticides used. It can be sprayed and sprayed, and has a simple operation. It is an ultra-efficient, ultra-concentrated control for citrus yellowing ( Huanglongbing) New medicinal fertilizer.
Huang Longbao special medicinal fertilizer effect: Sterilization, differentiation of pesticide residues and fertilizer harmful substances, supplement the content of soil humic acid and organic matter, increase the large and medium trace elements, promote root growth, dredge screen tube, rapid yellowing to green, prevention and treatment of Huanglongbing ( Yellowing disease).
Huanglong Antidote
Huang Longbao special medicinal fertilizer
Steps/methods? Huanglong antidote mother liquid 1:500 times water 50-100 kg (depending on the size of the tree), the roots.
Role one: Decomposition and transformation of pesticide residues in the soil and fertilizers left toxic substances;
The second role: to infiltrate and decompose the roots of citrus roots to partially encapsulate the colloids and promote the roots to re-contact the soil and new root growth.
Huang Longbao Medicinal Fertilizer Application Schedule: 1 Mid-Mid-Dawn Mid-October Chong Shi 2 Mid-April Mid-April Spraying of Foliar 3 Early May Early Chong Shi 4 Mid-July Flush-Shi 5 Early August Chong Shi 6 Late October Spraying Foliage
Huang Longbao's dosage: 1:500 for flushing and 1:5000 for spraying.
PrecautionsHuanglong antidote is only used as root soil spraying, and should not be sprayed on the leaf surface to prevent burns.
Huanglongbao pharmacy fertilizes in the vicinity of drip position of citrus tree. Huang Longbao spraying fertilizer time before 9 am or after 4 pm. References All citrus diseased plants with yellow anaemia are accompanied by root rot and root rot, because chemical fertilizers and pesticide residues react chemically with elements in the soil and form a so-called “urea-formaldehyde resin†colloidal body. When the roots of fruit trees absorb nutrients for a long time, the urea-formaldehyde resin is transported to the branches along with the roots. The urea-formaldehyde resin slowly builds up in the sieve accumulation of the tree nutrient transport, hinders the nutrient cycling of the tree, and also accumulates a large amount of urea formaldehyde around the roots. The resin forms a layer of film to root, lack of oxygen and lack of oxygen, resulting in rot root rot, tree flow plastic, yellow leaves, small shoots also small branches, the fruit is not mature, the diseased tree growth gradually weakens until Withered.Urea formaldehyde resin, also known as urea formaldehyde resin, is a substance produced by the reaction of urea and formaldehyde polymerization products.
Formaldehyde is a toxic substance of pesticides and fertilizer residues, which can destroy the structure of the protein and reduce the quality of the fruit.
Urea-formaldehyde resin is light in color, high in hardness, and has good insulation and temperature resistance. In real life, Chinese herbal medicines have insulating requirements for products: such as plug-in boards, switches, machine handles, and instrument housings.
The main purpose of urea formaldehyde resin is to use as a wood adhesive, such as plywood glue containing more than 80% of urea-formaldehyde resin.
(The above information is from the Central South Agricultural Technology Development Institute)
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