Clearing time The best time for clearing the garden is two times before budding and inflorescence separation. At this time, all kinds of diseases and insect pests began to emerge and multiply, and the eggs of the diseases and insects were bare on the branches. The tree body was not covered in any way, and the liquid medicine could directly contact the eggs of the diseases and insects, and the control effect was good. The objects of prevention and control in Qingyuan include pear psyllid eggs, bulbous pupae, rot disease, and black spot disease.
Garden clearing measures (1) Agricultural measures are summarized as "cut, scrape, and clear." "Scissoring" is to cut off disease and insect branches. Combine with spring pruning to cut off branches with disease, insects and eggs. "Scrape" is the removal of rough old skin. Scrape the rough skin and warp skin of the trunk to kill the worms and eggs hiding in it. "Qing" is a clean orchard. The litter on the ground of the orchard, thick old wood, bark of disease and insects, weeds, fallen fruit and waste fruits, etc. are completely cleared from the orchard and burned intensively.
(2) Chemical control: 20% pyriproxyfen · metavilt salt 2000 times + vegetable oil for controlling maggots; 43% tebuconazole suspending agent 3000 times for preventing black spot disease, 10% anisole metronidazole water-dispersed granules Agent 3000 times; prevent and cure rot with 20% syringaresin 100 times.
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