The trunk packing method is a new method for controlling fruit tree aphids that has been popularized and used in recent years. Using this method to prevent fruit tree aphids, not only the provincial labor, economy, convenience, but also applies to a wide range of applications, efficient and safe, light pollution. This method not only applies to orchards, but also has a more promotional value for garden fruit trees. Also suitable for controlling wood aphids. The use of tree trunk package method to control aphids, generally effective after 3 days, the control effect on the 5th day can be as high as 100%, 100 days of control efficiency can still be maintained at about 85%. The specific methods are as follows: 1. Select the site where the fruit tree is 20-30 cm away from the ground or the base of the main branch, and select a smooth zone with a width of about 15 cm (the trunk skin can be scraped off) as the drug-containing site. 2. Including the first place on the selected part of the drug-packing site contains a ring of absorbent material (old cotton, toilet paper, or used newspapers, etc.), and then dilute 50% methamidophos or 40% omethoate into the system. 3-5 times liquid, note or coated on the absorbent about 20 ml, and then use plastic film to tie tight. 3. Remove the wrap plastic film and release it after 5-6 days of the liquid's appearance; the absorbent should be removed before the rain to prevent the dressing from rot.
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