1, brown spot: mainly damage the leaves, causing early defoliation of fruit trees, pathogens spread by wind and rain in May, the initial infection of the tree's lower leaves, in June the lesion can be seen at the bottom of the leaf, after repeated infections, 7- In September, the diseased leaves increased rapidly, and overly closed orchards could have a large amount of fallen leaves in the middle or late July. The occurrence of serious flowering in the orchards occurred from August to September.
Control measures: (1) Strengthen summer pruning, improve ventilation and light transmission conditions, (2). Use general tree guards to prevent, disinfect, and repel disease and insect pests.
2. The occurrence of the peak of two-leafhoppers (commonly known as white spiders) occurs from early August to early September. This leafhopper has high fertility and high drug resistance, and the general acaricide is difficult to control.
Prevention and control measures: From June to July, more damage was done on weeds in orchards, and weed control was needed to reduce the number of insects. The new high fat film can be used to achieve certain preventive effect.
Control measures: (1) Strengthen summer pruning, improve ventilation and light transmission conditions, (2). Use general tree guards to prevent, disinfect, and repel disease and insect pests.
2. The occurrence of the peak of two-leafhoppers (commonly known as white spiders) occurs from early August to early September. This leafhopper has high fertility and high drug resistance, and the general acaricide is difficult to control.
Prevention and control measures: From June to July, more damage was done on weeds in orchards, and weed control was needed to reduce the number of insects. The new high fat film can be used to achieve certain preventive effect.
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