To strengthen the prevention and treatment of pear hibiscus in winter

Pyramid is the most important pest on pear trees. Adults and nymphs harm pear leaves, causing spotting, early shedding, weakening tree vigor, and reducing fruit quality and yield. The pear wood has a special diet and it mainly damages pear trees. It takes 4 to 5 generations every year. Adults are divided into winter and summer types. Winter-type adults overwinter in the cracks in the stems of pears, a few in weeds, leaves and soil, and comprehensive control of wintering sites in winter, can play a multiplier effect.

1. Clear gardens Clear the debris, fallen leaves, and weeds in and around the park, deeply buried or burned, and reduce the base number of winter pears.

2. Scrape the plastic film on the tree tray and use a knife to scrape off rough skin on the branches and spots such as rot, dry rot, and ring veins. Collect and concentrate them deeply.

3. Winter plowing not only improves the physicochemical properties of the soil, but also turns the winter pears in the soil out of the ground, allowing them to freeze or allow the birds to feed.

4. Irrigation When the temperature falls below the freezing point, the implementation of irrigation in the garden can drown the winter pears in the soil.

5. Pharmacological treatment Based on the protection of natural enemies, the critical period for pesticide control is the adult puerperium to the oviposition period, from late February to mid-March. The commonly used pharmaceuticals include 2% Tianda avermectin emulsion 3000 times, 25% Aketai water dispersible granules 3000 times, and 2.5% high-efficiency cyhalothrin 1500 times, etc. Effects, and cure diseases such as pears and pears.

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