As the temperature in spring rises, the pathogen of fruit trees begins to infect and fruit tree pests begin to multiply. In recent days, at the invitation of farmers' friends, the author explained to them the management measures of the fruit trees before the flowers. To do a good job in the management of fruit trees before flowering can effectively prevent the occurrence of pests and diseases, and make full preparations for the fruit tree flowering results.

I. Pest control

Spring fruit rot disease entered the peak of infection at the beginning of the year, and powdery mildew, mycotic disease, early defoliation, rotenia, anthracnose, and other pathogenic bacteria began to infect for the first time. Pyrosphaeridae, gold-grained moth, apple leaf roller moth, small Overwintering worms, eggs, and cockroaches of leaf roller moths, aphids, and spider mites have also begun to produce fleas.

However, at this time, various kinds of pathogens and pests have poor resistance to drugs, and small branches and leaves are convenient for application. Therefore, prevention and control of pests and diseases at this time can play a multiplier role in reducing the number of wintering diseases and insect pests and reducing late-stage pressure. . The best time to spray on the first clearing tree is when the fruit tree sprouts, that is, when the scales of the fruit tree buds are loosened and exposed green. The focus of the Qingyuan Park was to prevent stem diseases such as rot and dry rot, scale insects, cotton aphids, and red spiders. Agents can use lime sulfur, oil emulsions and other clear garden drugs. The best time for spraying the second time was florist red (or 5% of central flower opening). The focus of the Qingyuan Garden was to control powdery mildew, moldy heart disease, red spider, and aphids. Pharmacy can be selected from nitrile aconazole suspension, clococonazole, agricultural anti-120, polyoxin, imidacloprid, chlorpyrifos and other agents.

Second, timely cutting before flowering

Pre-flowering can adjust the proportion of flower buds and leaf buds and coordinate the relationship between growth and results. For the newly emerged saplings, flower buds should be retained as much as possible to alleviate the vegetative growth; for the young tree of the fruit period, flower buds should also be retained to obtain a certain amount of yield; for the fruity saplings, flower buds should be The proportion of leaf buds and buds is 1:3 to 1:2, and the flower bud retention is strictly controlled. The imbalance between the branches and the results of the branches and branches can also be adjusted by the difference in the amount of preserved flowers. The strong ones should spend more time on flowers and spend less on the flowers. It should be noted that the apple flowering season often encounters the hazards of low temperatures, high winds, and late frosts, affecting normal pollination and fruit setting. Flower buds should be left as much as possible until the fruit set is established.

Third, to ensure adequate fertilizer

The application of pre-emergence top-dressing irrigation plays an important role in the growth of fruit trees throughout the year. It can meet the fruit tree growth, flowering, and the need for fruit nutrients. The amount of fertilizer can be determined according to the soil, tree vigor, age, and yield. The time is usually from late March to early April. The type of top dressing is dominated by nitrogen fertilizer (accounting for 60% of the annual amount), supplemented by phosphorus and potassium fertilizers. . Water should be promptly applied after fertilization in order to facilitate fruit tree sprouting, flowering and fruit setting.

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