In the recent period, the flood disaster has caused some peach orchards to be flooded, and the roots cannot breathe, resulting in yellowing of leaves, weak trees, fruit drop, rapid growth and reproduction of pathogens, and various diseases (such as peach brown rot, Perforation, Botrytis cinerea, Branch blight, peach flow glue, etc.). If the water accumulation time is too long, poor ventilation often leads to root rot and even dead trees. Therefore, the fruit farmers in flood disasters should strengthen the management of the Taoyuan, and strive to minimize the disaster.
1. Improve the soil. Excessive rain, poor soil permeability, easy to form compaction. Before the rain, timely use of microbial bacterial fertilizer + plant-derived Chinese herbal medicine fungicide can significantly improve soil permeability and reduce the probability of root rot.
2. Eliminate water accumulation. The first is to seize the ditches and drain the water immediately to reduce the humidity of the soil and the air in the garden. Orchards with excessive soil humidity can pick up the roots of the soil under the tree tray to accelerate the evaporation of water, so as not to cause peach trees to accumulate water for a long time. Causes poor root growth or rot.
3. Pruning in time. Repair wounds in time, and remove the fallen fruit and leaves from the orchard. Cut off diseased branches, diseased fruit, cracked fruit and broken branches, broken branches, dig deep to reduce the infection of bacteria. For fruit trees that have been soaked for a long time, with severe root damage and luxuriant foliage, some branches and leaves should be properly cut off, first of all, to remove too many new shoots on the back, and a small part of perennial fruitless and empty branches should also be removed. Do not go to the new shoots of the middle and late ripe peach fruit still hanging on the tree, because the nutrients are supplied nearby, and the new shoots of the fruit thinning table will affect the fruit expansion; first, the unproductive branches, cross-grown branches, and the weaker growth and Branches with pathogens cut off to improve ventilation and improve the appearance of peach and fruit. Spray 1-2 times of disease prevention agents after pruning to prevent the spread of diseases and insect pests caused by pruning.
4. Re-bagging and centering the peach tree. If the fruit bag is damaged and the fruit is not damaged, remove the damaged bag, spray the foliar fertilizer and insecticide and fungicide again, and then re-bag after the liquid is dry. For the tilted or prone peach trees after the disaster, they should be straightened in time, remove the sand and silt in the tree tray, and cultivate the exposed roots of the fruit trees. After the soil is cultivated, step on it to avoid root damage again. If necessary, use a bracket to support ,fixed.
5. Cultivating loose soil. At present, there is a lot of rain, and the root soil will be compacted due to long-term water accumulation. After the water is removed, when the soil is slightly dry, it is necessary to carry out plowing, weeding and "moistening" in time to improve the permeability of the soil. To prevent the suffocation of the root system of the fruit tree and cause the death of the fruit tree.
6. Spray medicine to prevent disease. The rain will cause high humidity in the garden, which is conducive to the spread of germs and the breeding of pests. Disease and pest control should be carried out in time. It can be combined with top-dressing outside the roots, spray 1-2 times of broad-spectrum insecticides and fungicides throughout the garden, and spray evenly on the reverse side of the leaves, the outer periphery of the inner chamber, and the inside and outside. For orchards where decayed roots occur, rotted roots and dead plants should be dug up in time, and lime or sterilization chemicals should be sprayed around the tree discs for disinfection.
7. Top dressing. For trees with many fruits, weak trees should be timely topdressed to supplement nutrients. The topdressing is mainly based on phosphorus and potassium fertilizers, and the use of nitrogen fertilizers should be controlled to promote coloring and improve fruit quality. For unfruited orchards, spray 0.5% urea solution to Strengthen photosynthesis and increase tree nutrient accumulation.
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