Winter management techniques to prevent frost and water damage to walnut trees

Walnut tree

In winter, in order to prevent walnut from being harmed by frost water, the management of walnut is very important. This paper puts forward the following measures for walnut winter management technology:

1. Autumn turn. After the fruit was harvested, it was turned deeply before the defoliation, and the depth was 30cm to 40cm. At the same time, the larvae of walnut-lifting moth were picked up and destroyed.

two。 Apply basic fertilizer. Mainly rotten organic fertilizer should be applied as soon as possible from fruit harvest to defoliation (can be combined with deep ploughing). The amount of fertilizer application is 25kg / tree for young trees, 50kg / tree for trees in early fruit stage and 200kg / tree in full fruit stage.

3. The trunk is painted white. Tree trunk whitening in autumn and winter can effectively control diseases and insect pests such as walnut rot, longicorn beetle and walnut tumor moth. The formula is: sulfur powder, lime and water according to the ratio of 1 ∶ 10 ∶ 40.

4. Water it. Pour frozen water before freezing the soil.

5. Pest control. The concentrated burning or deep burying of diseased branches, diseased leaves and diseased fruits can control diseases and insect pests such as walnut bugs to a certain extent.

6. Young trees are protected over the winter. According to the different degree of cold in winter, measures such as burying soil, bundling grass handles and bundling newspapers can be taken to prevent the cold in winter. The soil burying method is to cut off the two ends of the plastic bag, cover the young trees, and fill the middle with soil, which is 30 centimeters higher than the tip of the tree.