Latest Reasons Why Mangoes Only Flower but Do Not Fruit and Prevention and Control Methods

Mango is a fruit that many people love, with large market demand and high economic benefits, so many people grow it. Many growers often encounter the phenomenon of mango plants that only flower but do not fruit. What is going on here? Let's find out together with the editor.

I. Reasons Why Mangoes Only Flower but Do Not Fruit

1. Improper management

The flowering and fruiting period of mango is the period when the plant has the greatest nutrient demand. If fertilizer is not applied in a reasonable combination at this time, and the amount, type and timing are improper, it will affect the flowering and fruiting of the fruit tree and cause the fruit-setting rate to drop. The vigor of the tree, the management of the two earlier flushes of leaves, and the shoots and leaves during the shoot-control period not being old enough or uniform enough will all have an impact.

2. Climatic factors

During the flowering period and pollination period of mango trees, whether the weather is good or bad is very critical, because at this time pollen is extremely sensitive to low-temperature weather. The influence of low-temperature overcast and rainy days will affect the normal germination of mango pollen, reduce the pollination rate of mango, and cause poor fruit setting in mango. If there is too much rain during this stage, it will also wash away the pollen, and the activity of insects during the rainy season will decline, which will also affect the effective pollination of the plant, leading to poor pollination and a drop in the fruit-setting rate.

3. Impact of pests and diseases

From before mango flowering to the pollination period is the peak period for various pests and diseases, and also the period when the most pesticides are sprayed. The diseases that plants are extremely prone to infection during this stage include anthracnose, powdery mildew, stem-end rot, bacterial angular leaf spot, sooty mold, and gummosis, while the most common pests include thrips and flat-headed leafhoppers. They will continuously harm the plant's tender buds and tender leaves, and do even greater harm to the flowers. The damaged flower buds will gradually turn black until they wither and fall off, and harmful fruits will also show disease spots, affecting the fruit-setting rate and fruit quality.

II. Prevention and Control Methods

1. Strengthen management

In the early stage, mango should be controlled in the application of nitrogen fertilizer, and it is not suitable to apply nitrogen fertilizer alone, so as to avoid excessive vegetative growth of branches and leaves, which absorbs too many nutrients and leads to a low flowering and fruit-setting rate. Excessive growth of branches and leaves will also lead to poor permeability, affect photosynthesis, and when humidity is relatively high, it will also cause pests and diseases. At this time, timely pruning is needed, cutting off dead branches, diseased branches, thin and weak branches, and excessive-growth branches, so that the branches are reasonably distributed, the nutrient accumulation of effective shoots is increased, which is conducive to bud differentiation and improves the fruit-setting rate.

2. Water management

When mango encounters overcast and rainy weather during the flowering period, it is necessary to shake the flowers in time after the rain to shake off raindrops and rotten flowers, so as to avoid flower rot. At the same time, spray chemicals in time to sterilize, repair wounds, reduce the incidence of flower rot, and also supplement nutrients such as polysaccharides and polypeptides to strengthen flowers and protect flowers.

3. Prevention and control of pests and diseases

After rain, timely remove dead branches and fallen leaves, diseased flowers and diseased fruits in the orchard, so as to reduce sources of infection and lower the pathogen base. At the same time, spray Lianguoan 150-300 times + Diliwang 500 times + Wofengsu 600 times to repair wounds caused by wind and rain, cut off the invasion routes of pathogens, and also supplement high-energy substances for the tree body, which is beneficial to the recovery of tree vigor. When diseases occur, use the right medicine for the symptoms and prevent and control them in time, so as to avoid further spread of pests and diseases.

  The above is an introduction to the reasons why mangoes only flower but do not fruit and the prevention and control methods. We hope it can help you. If you want to learn more related knowledge, please continue to follow us.