How to Care for Durian Trees During the Flower Bud Differentiation Stage and Crab Eye Formation

During the flower bud differentiation stage and crab eye formation, caring for durian trees plays a crucial role in determining the yield and quality of the harvest. Let's explore the techniques for properly caring for durian trees to promote favorable growth and increase fruit set rates in the article below!

Recognizing the flower bud differentiation stage and crab eye formation

Accurately recognizing the flower bud differentiation stage and crab eye formation in durian is extremely important to implement appropriate care measures, enhancing yield and fruit quality.

External signs

• The last leaf sheath turns silk color: This is the most important sign. The last young leaf sheath on the branch stops developing, changing from light green to a lighter shade, slightly glossy, resembling silk color. At this point, the tree has accumulated enough nutrients and is preparing to enter the reproductive stage.
• The apex stops growing: The growth tip of the branch stops elongating.
• Small spots appear on the branches: At the leaf axils, especially near the branch tip, small spots start to appear, slightly swollen. These are the flower buds forming.
• Formation of crab eyes: After a while, the small spots develop into shapes resembling crab eyes. "Crab eyes" are the immature clusters of durian flowers. At this point, if observed closely, you can see tiny flower buds inside.

Internal signs

• Observe histological cross-sections: This method requires specialized skills and equipment. By observing histological cross-sections under a microscope, the changes in the internal structure of the branch and the differentiation of cells forming flower buds can be clearly seen.

Techniques for caring for durian trees during the flower bud differentiation stage and crab eye formation.

The differentiation of flower buds forming crab eyes consists of three main stages

The stage of flower bud differentiation, forming crab eyes, is a crucial factor determining the yield of durian. Proper irrigation, nutrition, and pest control techniques during this stage will help the tree develop strong flower buds, leading to a bountiful harvest.

The stage of applying fertilizer to the tree

The stage of applying fertilizer to the tree occurs when the last leaf unfolds into a silk stage, which is the ideal time for the durian tree to accumulate nutrients, transitioning from the vegetative stage to the reproductive stage.

The most suitable fertilizer is NPK CON CO 7-7-14+12S+7Ca+0.45B, which combines nitrogen, phosphorus, potassium, calcium, sulfur, and boron to help the tree develop a strong root system, thick green leaves, and good disease resistance.

A formula with an NPK ratio of 1-1-2 is a perfect balance for this stage. The dosage will depend on the age of the tree, its health, and the type of fertilizer used, with varying amounts. Typically, farmers can apply 1-2 kg per base.

For the upper part of the durian leaves, farmers can use leaf fertilizers with a high phosphorus content to provide direct nutrition to the leaves, helping them to be thick, green, evenly aged, and free from pests and diseases.

Suitable leaf fertilizer products include: Supertan Vàng 15-30-15+2S+0.6Mg+TE, Cofoli PK500, Myfatop 325 SC, Ratoin 5WG.

The stage of pruning branches and spraying garden wash.

The pruning phase helps to effectively remove algae and prevent fungal diseases. Image: Internet

During the branch trimming and second garden washing phase, farmers need to perform this 3-5 days before bud formation to manage fungal diseases and algae.

Use a mixture of leaf fertilizer CofoliI CU (2ml/liter of water) + Cofoli PK500 (2ml/liter of water) to spray evenly over the entire plant, especially focusing on branches bearing fruit. The leaf fertilizer CofoliI CU contains 100% organic copper, which is very safe for the plant, helps to cleanse algae, and effectively prevents fungal diseases.

Bud Formation Stage

Finally, in the bud formation stage, there are two things that farmers need to remember:

• First, when spraying bud formation agents, farmers should do it 1-2 times with an interval of 7 days:

Use leaf fertilizer Cofoli K300 (2ml/liter of water) + Cofoli PK500 (2ml/liter of water) and then spray evenly over both the foliage and the fine roots. The leaf fertilizer product Cofoli K300 uses 100% organic potassium, and when combined with Cofoli PK500, it will have 30% effective two-way phosphorus to help the plant quickly differentiate flower buds. At the same time, it can be provided directly through the leaves and roots of the durian tree.

• Second, when cutting back on water, farmers should reduce the amount of water given to the plants for about 2-3 weeks to create drought conditions that stimulate flowering (the water cut will depend on the climate of each region).

Note: The timing of flower bud formation in durian trees will depend on the tree variety and the climatic conditions of each area. Farmers need to ensure that durian trees are planted in places with adequate sunlight, loose soil, and good drainage. After cutting back on water to stimulate flower bud formation, careful care of the plants is necessary, including pest prevention and maintaining a reasonable watering schedule, to ensure a uniform eyes while minimizing the risk of disease for the plants.

Proper care of durian trees during the flower bud differentiation stage helps the plants stay healthy, increases resistance to pests, and prolongs the lifespan of the trees. This is the foundation for the sustainable development of the durian garden, ensuring stable income for farmers in the coming years. We hope farmers will have a bountiful harvest with the quality products from Baconco!