How to manage the flowering period of apricot?

How to manage the flowering period of apricot? Please guide apricot trees to sprout and blossom earlier than other stone fruit trees, second only to mountain peaches. Apricot trees generally bloom from the end of March to the middle of April in North China, and the flowering time varies with different varieties and environmental conditions. To prevent late frost apricot trees bloom earlier and are vulnerable to early spring frost. After the flower organ is frozen, it shows a water stain, and the petals change color and fall off. When weather forecast frost is coming, apricot blossoms can be protected by smoking in apricot orchards which are vulnerable to late frost before and after flowering. Spraying with NH- snow during flower bud expansion and spraying 1% limewater in early spring can delay flowering by 5-7 days to avoid late frost. One month before reducing abortive flowers, spraying 1% urea or 20 mg / kg gibberellin on the crown twice every 10 days can make up for the lack of tree nutrition and reduce the rate of abortive flowers. Spraying 0.2% borax and 0.2% urea at flowering stage for 3 times, releasing bees at flowering stage or artificial pollination for 2 times were all beneficial to improve fruit setting rate. Disease prevention and pest control ① before flowering, apply 5-degree stone-sulfur mixture or crystal stone-sulfur mixture 30 times. ② sprayed phoxim under the tree plate before flowering. Rake the medicine into the soil with 1 kg of phoxim to 200 kg of water per mu to control almond wasps. For the control of peach aphids, peach powder aphids and other pests, ③ can coat the trunk at flowering stage. Generally smear 2-5 times monocrotophos and cellulose synthetic paste, and wrap it with plastic paper. 2000 times of imidacloprid can be sprayed after flowering to control red spiders, apricot scale, apricot tiger, apricot moth and so on. Spraying 70% methyl topiramate or 50% carbendazim 800x solution after anthesis in ④ can control apricot scab. Spraying 1500 times of trimethoprim after anthesis by ⑤ can control leaf miner and leaf roll moth. From late April to early May, ⑥ killed the overwintering larvae of the overwintering scale insect with a brush. Click to get more apricot planting techniques click to get more fruit planting techniques