Control methods of kiwifruit flower rot

After picking the fruit and before freezing, carefully remove the weeds and residual leaves in the garden and concentrate on burning or burying them outside the garden. Attention should be paid to drainage in the park to ensure ventilation, light and appropriate humidity in the park. After fruit picking, the whole garden was sprayed with 1500-2000 times of Jinlishi, and the whole tree and the whole garden were sprayed alternately with spring leomycin and agricultural streptomycin during the germination stage, the initial stage of sepal cracking and the stage of flower bud expansion.

1. Agricultural measures

After fruit picking and before freezing, carefully remove weeds, residual leaves, residual fruits, disease and insect branches, dry and withered branches, and concentrate on burning or deep burying outside the garden to prevent the spread of germs. Pay attention to the drainage in the garden, completely put an end to the dense row spacing, plant spacing, branch density and leaf overlap in the garden, ensure ventilation and light transmission and suitable humidity in the garden, destroy the living environment of bacteria, and reduce the number of pathogens.

The Winter Solstice concentrated on winter pruning before and after, shrinking, cutting and thinning according to the method of more buds and less branches, so as to reduce the probability of flower rot. Strengthen orchard water and fertilizer management, popularize balanced fertilization technology (organic fertilizer + inorganic fertilizer + mineral fertilizer + biological bacterial fertilizer), reduce soil pH value, ensure healthy growth of trees, and improve the ability to resist disease invasion.

During artificial pollination, healthy and pathogen-free pollen should be selected to reduce the risk of disease, keep the drainage in the garden smooth, no water in the garden after watering, no water in the garden after rain, and reduce the humidity in the garden.

2. Chemical measures

After fruit picking, spray the whole garden with 1500-2000 times of Jinlishi to reduce the number of pathogens. The whole tree and the whole garden were sprayed alternately with Chunramycin and agricultural streptomycin during the budding stage, the initial stage of sepal cracking and the stage of bud expansion.

Spraying fungicides throughout the garden at the early bud stage, such as pyrimidine, mesophyte, polyantimycin, etc., should be careful when spraying, not just a formality, and the agents should be used in rotation. For seriously affected plots or varieties, it is best to use protective agents (commonly used Bingsen zinc, Daimeng suspension agent, etc.) and therapeutic agents, in order to achieve the purpose of treatment and protection.