. An annotated list of the important North American forest insects. Forest insects. 18 FARMERS BULLETIN 16 23 Sticky bands.—Bands of a widely knoAvn sticky substance for tree banding, which may be obtained on the market, may be used on tree trunks after the bark has been scraped so that the material can be applied evenly in a thin layer with a paddle. The purpose of this band is to prevent caterpillars from ascending the trees, and if the egg clusters have pre- viously been treated, this is a very effective measure. Every week or 10 days during the cat- erpillar season a comb or other similar
. An annotated list of the important North American forest insects. Forest insects. 18 FARMERS BULLETIN 16 23 Sticky bands.—Bands of a widely knoAvn sticky substance for tree banding, which may be obtained on the market, may be used on tree trunks after the bark has been scraped so that the material can be applied evenly in a thin layer with a paddle. The purpose of this band is to prevent caterpillars from ascending the trees, and if the egg clusters have pre- viously been treated, this is a very effective measure. Every week or 10 days during the cat- erpillar season a comb or other similar implement should be run over the band in order to prevent hardening of the sur- face and to bring up fresh, sticky material from the part of the band near the bark. (Fig. 13.) Placing these bands on the trees prevents the caterpil- lars from reaching the foliage; and as they usually mass in large numbers beneath the bands, conditions are favorable for wilt disease to develop, and the caterpillars often die in large numbers from this disease and from starvation. Gipsy moth tree-banding ma- ;—This is a black, greasy substance which was prepared and tested by the Bureau of Entomology in cooperation with the Bureau of Chemistry. It is similar to the product known as " Kaupenleim " that has been used in the German forests for many ^^ears to pre- vent injury to t;he trees by caterpillars. It is applied with a special " gun " designed for the purpose. (Fig. 14.) The thick, narrow band left on the tree trunk prevents the cater- pillars from reaching the foliage. This material is cheap and effective and is easily applied because it is not necessary to scrape the trees before putting it on. 3 For full information concerning the preparation and use of this tree-banding material, apply to the gipsy-moth laboratory of the U. S. Department of Agriculture at Melrose Highlands, Figure 13.—Caterpillars on tree trunk below sticky band. Please note tha
Size: 944px × 2647px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorhopkinsadandrewdelmar, bookcentury1900, bookdecade1900
