1. Water regulation and prevention of fruit cracking

Always keep the soil moisture at 70%-80%, and don't dry and wet suddenly, causing different swelling pressure inside and outside the peel and cracking the fruit. There are differences in the phenomenon of resistance to fruit cracking between varieties. Preventive measures: â‘ Select crack-resistant varieties; â‘¡Spray calcium on the leaf surface, spray 600 times the amino acid water-soluble fertilizer + calcium 4 times on the leaf surface after declining flowers and before harvesting; â‘¢Do not flood the flood water with small water frequently.

2. Cherries enhance tree nutrition

The fruit begins to swell 4 to 6 days after flowering, and foliar fertilizer should be sprayed. 15 days later, a spray of potassium dihydrogen phosphate and micro-fertilizer. In the period of rapid expansion of the fruit after the cherry hard core, combined with watering, spray 30 kg of ammonium bicarbonate + 10 kg of potassium nitrate per acre for two consecutive applications. Not only the fruit is big, but also the color is bright and bright. In view of the law of weaker trees with more fruit-bearing trees and less fruit-bearing, other agronomic measures such as increasing nitrogen fertilizer can be used to cultivate robust trees.

Three, control tip topping

In the cherry young fruit stage, the three physiological changes of fruit development, new shoot growth, and flower bud differentiation proceed simultaneously, leading to fierce nutrient competition. In order to reduce the competition for young fruit nutrients, the prosperous shoots should be topped in time, leaving 5-6 leaves.

Fourth, control output

For the production of high-quality cherries, the output should be controlled at 750 kg per mu. Watering sooner or later after flowering will affect fruit setting. Experiments have shown that watering on the first day after the flower is declining can keep about 80% of the original fruit volume of the tree when the flower is declining. The fruit set will decrease by 10% to 15% for every day of delay in watering. Therefore, in production, the amount of fruit set in the tree should be adjusted according to the target output and the watering time after flowering.

Five, fruit-preserving measures

In the period of fruit expansion, the young fruit often senescence, a large number of willow yellow fruits with soft core appear, and the fruit does not shrink. The fruit should be watered at the right time and moderately according to the soil moisture before the fruit hardens. In this period, you can spray biological fungicides + high-quality potassium dioxophosphate to prevent perforation disease and supplement nutrition to prevent fruit drop. Ripe cherries are susceptible to bird damage. Each orchard should choose appropriate anti-bird measures, including bird-proof nets, tree scarecrows, etc., according to their own facility conditions. If there are birds in the shed, you can set off firecrackers to drive them away. Pick the fruits in time when they are ripe.

6. Drosophila control

Using the tropism of the adult Drosophila melanogaster, a trapping agent is formulated to trap and kill the adults to achieve the purpose of pest control. While taking control on the tree, spray the pure plant insecticide Qingyuanbao (0.6% picrolactone) 1000 times solution on the tree once, and respray once every 10 days or so. Add the prepared 3% sweet and sour liquid to the spray liquid. When spraying, focus on the inner bore of each tree. Spray the pollution-free insecticide pesticides on the orchard ground and ridge overgrown weeds; re-spray the above-mentioned pesticides every 10 days after the first application. The selected pesticides are 2.0% avermectin 4,000 times, 4.5% methamphetamine 1500 times, and 40% laspen 1500 times. When spraying, only spray the overgrown weeds, and do not spray if there is no grass. 3% sweet and sour liquid is also added to each spray liquid.

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