PINK DISEASE CAUSING DAMAGE ON RUBBER TREE 21/06/2023

 PINK DISEASE CAUSING DAMAGE ON RUBBER TREE 23/05/2022

 

Pink disease commonly causes diseases on rubber plantations in the rainy season, especially on garden from 4-8 years old. This year, rubber has to go through a period of severe drought, weakening the tree, so now in tnshe rainy season it is easy to get infected. Therefore, it is necessary to pay attention to good management to avoid affecting the garden.

 

* Symptoms and effects:

Initially the fungus has a white coating on the surface of the bark. When the disease is severe, the fungus turns pink. The disease damages the bark, so the branches or stems above the diseased area die, and below the diseased area, shoots often grow. The bark where gets diseased is usually oozes latex. The disease usually appears on the stem where the branches are branching. The disease causes death of branches or truncation of rubber tops, affecting the uniformity and overall yield of the whole garden.

 

* Harmful agents and arising conditions:

The disease is caused by Corticium salmonicolor fungus . The disease develops in the rainy season, especially in the months with a lot of rain . In hot and humid conditions, the fungus thrives. The rubber gardens are over-applied with nitrogen fertilizers, are dense, weeds are abundant and the humidity is high, or the rubber gardens are poorly cared for, and the trees are weak, so their resistance is often severely damaged.

 

* A number of integrated prevention and treatment measures have been applied and shown to be highly effective:

Plant at an appropriate density, and do not create canopy , rubber trees is too low

During the rainy season, regularly clean the garden, except for weeds and prune dead and ineffective branches to create ventilation in the garden. Diseased branches should be destroyed. A good drainage system is required.

Fertilize to avoid excess nitrogen, need to increase potassium fertilizer. Should use more foliar fertilizers such as MULTI-K, or micronutrient fertilizer POLY FEED 15-15-30, spread CALCIUM NITRATE fertilizer to improve soil. These fertilizers will help strengthen the plant resistance and increase yield and quality of latex.

In the rainy season, it is necessary to spray preventively with products such as: SAIPORA 350SC (mixed with 200-500ml/100 liters of water), or SAIZOLE 5SC (mixed with 200-250ml/100 liters of water), or VANICIDE 5SL (mixed with 500ml/100 liters of water).Pay attention to spray on branches on the trunk (where water is easy to stagnate) to prevent disease.

When the plant starts to get diseased, it is possible to spray or mix with product on the diseased stem.

Regularly check the garden during the rainy season, to detect diseased plants and promptly handle them, in order to reduce damage and reduce the cost of prevention. Particular attention should be paid to orchards with a history of infection.

Prevention needs to be carried out on a large scale to be effective. Therefore, it is necessary to pay attention to disease prevention for rubber gardens and adjacent perennial fruit orchards. Mobilize rubber plantations in the region to prevent and control disease to limit the accumulation of disease sources and avoid mutual spread.

 

 

 

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Currently in Vietnam, the cultivation of citrus trees is playing an important role in the country agricultural production. The benefits of citrus trees have made many farmers rich. However, wherever citrus trees are planted, fissured trunk cracking appears and causes damage. If any gardener is negligent or lacks attention to this disease, the tree will die, even the whole garden.

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