Pest control of cherry trees in winter dormancy
The comprehensive control of pests and diseases of cherry trees in winter dormancy should use artificial and agricultural methods to clean the orchard, eliminate the source of wintering pests, effectively eliminate harmful organisms, and lower the wintering base.
1. Sweeping leaves: Fallen leaves are one of the main wintering parts of many pests and diseases. For example, cherry brown spot disease and black ring rot disease are overwintering on the damaged leaves. Pests such as leaf roller moths are lurking on the affected leaves for wintering. Therefore, after the end of the cherry leaves, thoroughly clean the leaves, bury or directly manure, eliminate the pests and winters on the leaves, can greatly reduce the number of pests and diseases in the leap year.
2, combined with pruning, cutting off the pests and branches: winter pruning is an important technical measure for the management of cherry trees, and an effective method to eliminate wintering pests during the dormant period. Reasonable pruning can adjust the load of the tree, improve the ventilation and light transmission conditions of the orchard, promote the robust growth of the fruit trees, and improve their ability to resist pests and diseases. At the same time, combined with pruning, the pests that overwinter on the branches, such as leaf roller moth, peach aphid, tumor mites, red spiders, etc., are cut off, and the pruned pests are burned and destroyed to eliminate the overwintering pests on them.
3, deep planing tree plate: There are many wintering pests lurking in the soil under the canopy. Before the soil is frozen, the deep-planned tree plate can directly kill some of the wintering insects, pear flower nets, pear star caterpillars, and boat-shaped in the soil. Caterpillar, Hawthorn red spider (winter type female cockroaches in the soil around the root neck, under the leaves, overwinter between weeds). At the same time, by turning the soil, a part of the pests can be exposed to the soil surface. This part of the pest is not eaten by birds or frozen in the cold winter.
4, scraping the skin, rough skin, diseased tumor: the skin on the trunk, the rough skin is the main wintering place for pests and diseases, such as mountain plant red spider (winter type female cockroach), leaf roller moth, pear small heartworm, pear star caterpillar, etc. Springing and roughing under the winter, scraping off the skin and roughing the skin can eliminate most of the above-mentioned pests. Scrape the root cancer disease tumor, gum disease rubber block, root cancer disease with 1% copper sulfate, 80% 402 antibacterial agent cream 50 times liquid or scrape the disease spot and apply 40% Fumei arsenic wettable powder 30 times solution to smear the wound The flow gum disease is mixed with 50% of the antibacterial 50g + 50% sulfur suspension agent 250g. It has a good effect on reducing the source of infection in the coming year.
5, protect the wound, closed saw cut: winter pruning the wound left on the tree, is the path of invasion of the bacteria, but also the wintering place of some pests. It can be blended with varnish or tung oil with appropriate amount of lard to protect the wound and prevent the invasion of germs.
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