How to manage walnut trees after picking is related to the high yield of high-quality walnut fruits and walnuts in the coming year. Management of walnut trees in autumn and winter should start with the following aspects.

Fertilization. In combination with soil deep turning, the basal fertilizer is applied, and the basal fertilizer is mainly organic fertilizer. According to walnut yield, site conditions, tree nutrients fertilization. Fertilizer should pay attention to the fertilizer and soil mix, can not be directly piled in the pit.

Watering. After the fertilization, water should be poured in a timely manner to facilitate the absorption of basal fertilizer and accelerate the decomposition of fertilizer. On the 10th of November or so, it is necessary to pour over the winter water. When the topsoil is half dry, the rhizomes will be painted white and the trunks will be painted white. Walnuts are hi wet, resistant to waterlogging, weak in drought resistance, and watering is an effective measure to increase production.

prune. It is most suitable to prune from autumn fruit harvest to before leaf yellowing. It is not appropriate to prune one month after defoliation and near to budding, mainly pruning large branches, eliminating dense branches, pest branches, shading branches and back branches, retraction. Pendulous branches. Other prunings should wait until the second year before budding.

Pest Control. The main pests and diseases of walnut trees are walnut rot, walnut branch blight, walnut canker, cloud bengal, walnut limb moth, walnut leaf a, walnut urn, and scale insects. Autumn and winter are the best time to prevent and treat pests and diseases. The principle of “prevention as the mainstay and comprehensive prevention and treatment” should be adopted. The prevention and control of the occurrence of specific pests and diseases in the walnut garden should be conducted in a timely manner to reduce the sources of pests and diseases.

Deep turning. After the fruit is harvested, it is deep-felled to a depth of 30-40 cm after defoliation. At the same time, the larvae of walnut moth excavated in the soil are extirpated and eliminated.