The present invention relates to the technical field of
forestry prevention and control, and proposes a device for dual prevention and control of elm purple leaf beetles, including a protective cover, which is bent into an inverted
funnel shape with a thin top and a thick bottom. The protective cover is a hard plastic product, and the inner wall and side edges of the protective cover are affixed with double-sided
adhesive tape. The upper end of the protective cover is fixedly connected with a clamp, and a soft
sponge ring is installed on the inner side of the clamp and the joint between the
trunk. By designing the protective cover to surround the bottom of the
trunk, the physiological characteristics of the elm purple night beetle that can only crawl but not fly are utilized to block the path of the elm purple night beetle
crawling along the
trunk, and the elm purple night beetle is prevented from climbing the tree and harming the leaves. At the same time, on the inner side of the protective cover, bitter bean stem and leaf
powder is applied to the double-sided
adhesive tape in the protective cover. The bitter bean stem and leaf have a special smell. The principle of
plant allelopathy is utilized to achieve the purpose of driving away the elm purple night beetle, and the elm purple night beetle is prevented from staying near the trunk, or
crawling to the outside through the inner side of the protective cover, so as to achieve the
dual effect of blocking the
crawling path of the elm purple night beetle.