Where does the fruit tree disease hide?

The first is in the soil and diseased leaves, diseased fruits and weeds. It has been ascertained that the pests of Prunus persicae, T. gracilis, T. gracilis, Scarabaeida as well as C. elegans and C. elegans are mainly fleas, adults, and larvae that live in the soil around the base of the tree, and overwinter under the stones. , Pygmy arborescens, Pyglossus elegans, and some leafhoppers winter in weeds; multiple brown spot, scab, gray leaf spot, apple flower rot, grape white rot, downy mildew, peach brown rot Diseases and other pathogens mainly in the orchard litter, rotten fruit in the winter. Therefore, all measures to promote the decay of litter as soon as possible can play a preventive role. For example, plowing tillage, winter irrigation and applying organic manure and fungus fertilizer to increase the soil microbial species.

The second is in the tree. Including damaged branches, stiff fruits and bark, such as Daphnia majus, Syrphidae, leaf roller moth, pear stem beetle, pear borer, apple scroll moth, various scale beetles, aphids, leafhoppers and pods Pests and peaches, pears, apples, brown rot, rot, ring rot, anthrax, dry rot, etc. are on the rough skin, diseased skin, scars on the winter. For these pests and diseases, weeds should be cut off promptly, pests and branches should be removed, and the diseased fruit remaining on the tree body should be removed; scraping off the rough skin, cracked skin, diseased skin and even the removal of diseased plants is a very effective prevention and control measure. A special reminder to the fruit farmers' friends is that the cleared bodies must be burned or buried deeply. In addition, the trunk whitening can effectively prevent freezing damage and also eliminate some germs and pests. Spray 1 Baume degree lime sulfur compound or 45% crystal lime sulfur agent 100 times before clearing the garden, spraying 4-5 Baume degrees of lime sulfur or 45% crystal lime sulfur 30-50 times It is also very effective.

The third is in seedlings or other propagation materials and their accompanying soil. This creates an opportunity for pests and diseases to spread with seedlings over long distances. Therefore, attention should be paid to the cultivation of disease-free seedlings and the introduction of quarantine measures to the imported and exported seedlings.

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