What is citrus seedling tatter leaf disease? Understanding this disease in one article
What is citrus seedling tatter leaf disease? What harm does citrus seedling tatter leaf disease cause? How to prevent and control it? Experienced netizens are also invited to give advice. Zhongdi Network has compiled the harm, causes and treatment methods of citrus seedling tatter leaf disease, listed below for netizens' reference. Harm of citrus seedling tatter leaf disease: citrus tatter leaf...
What is citrus seedling tatter leaf disease? What harm does citrus seedling tatter leaf disease cause? How to prevent and control it? Experienced netizens are also invited to give adviceZhongdi Network has compiledthe harm, causes and treatment methods of citrus seedling tatter leaf disease, listed below for netizens' reference.
Harm of citrus seedling tatter leaf disease:
Citrus tatter leaf disease is caused by citrus tatter leaf virus (CTLV), and mainly harms citrus trees using trifoliate orange and its hybrids as rootstock. After trifoliate orange and trifoliate orange hybrid rootstock citrus trees are affected, the rootstock-scion union shows ring constriction, and the scion part above the graft union swells, with leaf veins yellowing, similar to the yellowing caused by ring barking.
Peeling back the bark at the union, a ring of constriction line can be seen between the xylem of the scion and the rootstock. When pushed by external forces such as strong wind, the rootstock-scion union of diseased trees easily breaks, and the broken surface is smooth.Tatter leaf diseaseAfter the disease severity increases, the plant becomes dwarfed, the root system rots, and the plant may even die.
Citrus tatter leaf diseaseAt present, there is a lack of effective control agents, and planting virus-free seedlings is an important measure to prevent the occurrence of this disease. When purchasing seedlings, be sure to understand the nursery's seedling propagation situation, so as to confirm that the purchased seedlings are virus-free plants obtained through virus elimination.
Causes of citrus seedling tatter leaf disease:
Citrus seedling tatter leaf disease is mainly caused byDiseased plants in the orchard are the source of infection for this disease. It is generally transmitted through grafting, and can also be transmitted by knives and scissors contaminated with the sap of diseased plants. It can also be transmitted to trifoliate orange hybrids through dodder. No virus-transmitting insects have been found.
Identification and treatment methods of citrus seedling tatter leaf disease
Identification methods of citrus seedling tatter leaf disease:Common woody indicator plants include Rusk citrange, Troyer citrange, Carrizo citrange and thick-skinned lime, etc. Symptoms on Rusk citrange are transparent yellow spots on leaves, round or irregular in shape, leaf margin defects, leaf deformity, slightly sunken longitudinal grooves on stems, and crooked branches. In severe cases, the plant is significantly dwarfed.
Treatment methods for citrus seedling tatter leaf disease:When the diseased plant rate is below 20%, all should be dug out, and soil disinfection or replacement with new soil should be carried out. After 6 to 12 months, virus-free citrus seedlings can be replanted; when the diseased plant rate is above 20%, 2 to 3 approach grafts of Goutou orange rootstock or fragrant orange rootstock can be adopted. After 1 year, the yellowing tree vigor can recover, or nutrient soil can be mounded at the root crown to promote new roots to sprout above the graft union.
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