After the longan crop is planted, if it can be properly managed, it will enter the result period after 3 years, put autumn shoots at appropriate time, cultivate the formation of the mother branch with strong results, control the winter shoots, pay attention to sparse spikes and control spikes during the flowering period, and increase the fruit setting rate. The prevention and control of pests and diseases is the key cultivation technique for the long-term fruit tree harvest, and the main techniques for the flower and fruit period are as follows:
1. Flower
After 4-6cm of flower spikes or short cuts are removed, 1000-1500 times of multi-elements are sprayed to promote vigorous spikes. At the same time, attention should be paid to the control of pests and diseases. If shoots occur, manually remove the leaves or use Huanongda control. No. 2 kills the young leaves on the flower spikes.
2, Baoguo
(1) In the 7-10 days after the female flower has been fetched, before the fruit is dropped in the first time, the fruit is sprayed with 920 Preservatives and applied for a strong fertilizer. After 10-15 days, a new source of polyphosphoric acid is sprayed. Potassium dihydrogen phosphate can also be used only to make potassium dihydrogen phosphate (concentration 0.2%), at the same time link pest control pests.
(2) After the fruit is divided into small and large fruit, bravely conduct a thinning of fruit. When the size of the bean is small, the number of fruit per ear is set.
(3) After the second physiological fruit drop, apply a strong fruit fertilizer, mainly phosphorus and potash fertilizers, and then spray the majority of the spray to produce strong fruit, and pay attention to pest control.
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