Spray foliar fertilizer. Foliar fertilizer should be sprayed during the flowering period, because the absorption is fast, which can promote nutrient absorption and flower bud differentiation. It is recommended that potassium dihydrogen phosphate, urea, etc. can be sprayed, and the combined application of root fertilizers, mainly diamine and urea. Each tree is sprayed with 0.3-0.5 kg according to the age of the tree.
Be careful. The main purpose of topping is to concentrate nutrition on flowers. The temperature of winter jujube is high during the flowering period, and the nutrients on the ground are intercepted after the nail is opened. The growth of jujube heads, secondary branches, lignified jujube hanging, and sprouting at the base not only consumes the nutrition of the tree, but also is not conducive to the prevention and control of pests Therefore, the new jujube head should be removed in time, the basal sprouting should be cut off, and the secondary branches and lignified jujube should be topped. After 5 to 7 secondary shoots of the newly-released jujube heads, which are renewed in spring, should be topped in time to control growth.
Ring stripping. The most suitable time for ring stripping is the flowering period. The ring stripping should not be too early. When the flowering reaches more than 30%, the ring stripping should be carried out. The width of the ring stripping depends on the age and vigor of the tree, and is generally controlled at 3 to 8 mm. The ring stripping width can be determined according to your own experience and habits. The purpose of ring stripping is to retain nutrients, allow them to flow back to the roots of the tree, promote the reproductive growth of flower buds and increase the fruit setting rate.
Green blind stink bug. The green stink bug overwinters with eggs in the residual piles and crevices of the cut, and the damage peaks are concentrated in the germination period, the flowering period of jujube trees, the young fruit period, and the ripening period of the jujube fruit in the early to mid-May to early June. In order to achieve the best results, we must seize the three peaks in comprehensive prevention and control.
Grey borer. Commonly known as jujube beetle, larvae overwinter near the beak. It can be started 3 days after the jujube tree is opened, with 48% chlorpyrifos 400 times solution or armor treasure, sprayed or smeared once every 10 days for 3 consecutive times for prevention and control.
Dry rot. It can be sprayed with 10% Shigao water dispersible granules 2000 times liquid or 30% tebuconazole 3000 ~ 4000 times liquid spray, and it can also be targeted to apply azole products.
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