Reasons Why Mango Trees Only Flower Without Setting Fruit and Control Methods

Mango is a very common fruit in daily life. Many people love eating it, and it has always sold well on the market, so more and more people are growing it. Some fruit growers find that the mango trees they planted only flower without setting fruit. What is going on here? What control methods are there?

Why mango trees only flower without setting fruit

There are both human and natural factors affecting mango flowering. For example, excessive application of nitrogen fertilizer will cause an increase in endogenous hormones in the plant, keeping vegetative growth in an active state and affecting flower formation; high temperatures and humid climate in winter are favorable for root activity, absorbing large amounts of nutrients and water, supplying vegetative growth of the aboveground parts, and creating favorable conditions for winter shoots to sprout. Mango trees sprouting winter shoots will affect flower formation. To make mango trees flower and bear fruit normally, measures such as regulation with plant growth regulators, nutrient regulation, pruning, improved water and fertilizer management, and girdling to promote flowering can be used to promote normal flowering in mango. And when mango flowers normally but flowers without setting fruit, it is generally also because the tree body grows excessively, vegetative growth dominates, reproductive growth is at a disadvantage, and ultimately no fruit is set.

Control methods for mango trees that only flower without setting fruit

1. Physical control

The density between fruit trees should be reasonably controlled, pruning and shaping should be done well, and diseased and insect-damaged branches, dry rot branches, old flower stalks, and dense shade branches on the canopy should be cut off to keep the orchard ventilated, breathable, and light-transmitting, and to prevent weeds from growing thickly. In low-lying areas of the orchard, do a good job of drainage and protection. Every year after pruning mango trees, use lime sulfur mixture and Bordeaux mixture for more than 2 rounds of orchard cleaning and tree washing, and clean out all residual branches and fallen leaves, fallen fruit, and diseased fruit from the orchard to be burned elsewhere.

2. Chemical control

(1) Anthracnose

It mainly harms the young leaves, flowers, and fruit of mango trees. After young leaves are infected, many round brown spots appear, surrounded by yellow halos, and they gradually expand into round, polygonal, or irregular brown lesions. For control, use 80% Daconil 500-700 times dilution; bromothalonil 1000 times dilution for spraying; 25% mancozeb 400 times dilution, or 45% ultrafine colloidal sulfur 250-500 times dilution, etc., all have good control effects.

(2) Powdery mildew

It mainly harms inflorescences, young fruit, and young leaves. For control, spray 50% carbendazim 500-600 times dilution or lime sulfur mixture 600 times dilution, or use fungicides such as 0.3-0.4 degrees Baume lime sulfur mixture, 20% triadimefon 1500 times dilution, 40% miebingwei suspension concentrate 400-600 times dilution, etc., spraying once every 10-12 days……

(3) Thrips

You can use 50% imidacloprid wettable powder 3000 times dilution; 2.5% beta-cyfluthrin 2000 times dilution……, and the specific pesticide use should be reasonably combined according to the actual situation.