Processing mango flowers in the North

Mango flowers (Photo: nuidaisuke)

In our country, mango trees are grown mainly in the South, while in the North is grown very little, the main reason is also because when mango flowers flowering fruits from December to February, the following year often see the northeast monsoon. , the temperature is low, accompanied by drizzle and high humidity, causing the flowers and young fruits to lose a lot. If it is, it is only the old mango varieties that our relatives called muom trees, the long-lived mango trees should withstand the cold climate of the North but the quality is poor, the fruit is small and very sour. New varieties of mangoes are very few varieties that tolerate this harsh condition.

Recently it is known that the Vegetable Research Institute imported from China some late flowering mango varieties in April to May when it was warm and dry. It may be suitable for planting in the North. is in the process of monitoring. Particularly in the Northwest region (Son La and Lai Chau) because of the Hoang Lien Son range to shield the northeast monsoon, 1-2 months when the mango flowers bloom, the weather is relatively warm and dry, so the mango flowers are less fallen and planted.

In the South, the treatment for mango to off-season flowering has been quite popular and effective. But usually only in dry season, less rain. In my opinion, in the North, it can be done but it is difficult to do, it is labor intensive and the results will probably not be high. The principle of how to do this is when mango buds have grown at a full level, use a number of measures to stop the growth of the tree and switch to the stage of growing sex, ie flowering.

How to do it in detail, I would like to summarize it for my relatives to consult : When the tree has the second round of the year, the leaf begins to turn pale green like the color of young banana leaves, then begin to process. There are two main things to do: First, stop watering, make the soil dry for 15 to 30 days depending on whether the soil is high or low. At the same time, using Paclobutrazol mixes water to water down to the root according to the dose

(Photo: botany)

g instructions on the label of each medicine. Paclobutrazol active ingredient in us now has many products with many different trade names with 3 contents of 10, 15 and 25% active ingredients, the dosage is different, note the instructions on each label drugs (typically in the market recently Saigon P1 15WP product). After watering Paclobutrazol and allowing the soil to dry for a while, it can be watered again and sprayed with KNO3 (commercially known as Multi-K) to stimulate the flowering of plants quickly and simultaneously.

It should be noted that during treatment if it rains a lot, the plants will be slow or less flowering, if possible, use a plastic canvas around the tree for a while to keep the soil dry.

Based on the weather rules in the Northern Delta, I think appropriate processing time may be in April & 5 DL. At this time, it is less rainy and dry. By June and July when mango flowers are warm and rainfall is not much, the rate of fruiting will be high. Treated before winter, when the mango flowers get cold, they still lose a lot. In order to limit the loss of flowers and young fruits, when the flower buds are evenly sprouted, you should apply less fertilizer and spray NAA or GA3 stimulants. You can spray again once the fruit is with your fingertips. At the same time, attention should be paid to pest and disease prevention. For anthracnose, Bendazol, Carbenzim, Thio-M can be sprayed early before flowering 2-3 weeks, if possible, spray periodically every 5-7 days until before harvest, for powdery mildew disease sprayed mineral oil SK Enspray 99EC, sulfur-based fungicides such as Sulox or Mexyl MZ in the period before mango flowering and young fruit period.

There is another problem to note is that normally around October 11 mango also flowering affects the flowering process later. To limit natural flowering, around July-August, you apply nitrogen fertilizer a little higher, if you have a few flowers, cut it off immediately.