Pear carp is the most important pest on pear trees, which can damage pear leaves, cause dead spots, weaken trees, and reduce fruit quality and yield. It occurs 4 to 5 generations per year. Adult hibiscus is divided into winter and summer. Winter insects overwinter in the cracks of pear branches, and a few in weeds, deciduous and soil, seriously affecting the quality and yield of the fruit. Therefore, it is necessary to comprehensively control the wintering place.
The Qingyuan cleans up the branches, fallen leaves and weeds in and around the park, buried or burned, which can reduce the wintering pear raft.
Scrape the plastic film on the tree tray, use a knife to scrape the rough skin on the trunk and the lesions such as decay, dry rot, and wheel ridge, and then concentrate and bury it.
Irrigation When the temperature drops below the freezing point, irrigation in the garden can be carried out to drown the wintering pear raft in the soil.
The key period for the prevention and treatment of pharmaceutical agents is the overwintering adult to the spawning period, that is, in March and mid-March. Commonly used agents are 20% methrin emulsion 3000 times solution, 10% Dagong WP 2000 times solution, 0.9% Ai Fuding 3000 times solution, etc., can also cure pear bees, pears and so on.
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