How to treat broom, yellow leaf disease on fruit trees

Many solutions for prevention and treatment of broom-disease pests on longan trees and yellow leaf disease on 'Sanh' orange trees are being actively researched and applied by relevant branches of the agricultural sector in Vinh Long.

Master Nguyen Van Liem, Director of the Plant Protection Department of Vinh Long said that the department is working with the Southern Institute of Fruit Trees to implement, prepare reports and take basic tests of the topic 'Disease research Dragon broom on longan tree. '

Currently, Vinh Long province has nearly 3,000 / 7,000 hectares of labels are infected with dragon broom with the rate of harm from 9 to 40%.

People harvest labels.(Photo: Dinh Hue / TTXVN)

Through initial research, the Department has discovered velvet arachnids - cool spiders, afraid of light - related to broom disease on longan.

The disease appears on young leaf buds and even on flowers, causing leaf buds, flowers to not grow and grow into bunches, these leaves do not grow and cluster like brooms; If the flower makes flowers less developed and the ability to fruition is very poor.

Sub-department recommends and organizes training and guides gardeners on management of broom disease by cutting about 50cm of branches with leaves, diseased flowers, frequent water spraying, garden cleaning .

When the label comes out, it makes the silk turn green, fertilize with phosphorus and high potassium, when the bud turns to age evenly, proceed with potassium chloride.

In particular, when longan trees flower and during the flowering period until the fruit trees need to be sprayed periodically, they will be prevented as after harvest.

Balancing properly, properly in each stage of flowering, flower and fruit; Combined with velvet antiseptic spray for the period when the plant is ready to sprout and in the early stage.

For citrus trees such as 'Sanh' orange, Nam Roi pomelo in Vinh Long area, the current pest is mainly yellow leaf disease, the rate of disease is from 7 to 20%, causing damage in Tam Binh and Mang Thit districts. , Tra On, Vung Liem.

In 2009, Tam Binh district (Vinh Long) was attended by the Coordination Committee 'Strengthening agricultural extension activities to apply technical advances in citrus planting to poor farmers in 5 provinces of the Mekong Delta'. Gold leaf disease recovery model on an area of ​​1ha orange gourmet.

The initial effect is that the project has helped the locality improve productivity and quality and expand the area of ​​growing orange trees in a sustainable manner.

Tra On district is also a key area for citrus development. In 2010, in the area of ​​Tra On district, about 25% of the area of ​​oranges suffering from yellow leaf disease affected the economic income of the garden and the target of developing the district's key orange tree.