. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 28 THE BED SPIDER ON HOPS IN CALIFORNIA. BANDING WITH TANGLEFOOT. Banding with tanglefoot has become the chief method of control- ling the hop flea-beetle (Psylliodes punctulata Melsh.) in British Columbia, and as the mites also work up the vine mainly by crawling it was deemed advisable to attempt to check their progress by means of the tanglefoot bands. In order to test this method, 10 infested hop vines were selected. A few leaves were removed to prevent bridging, and in some cases the vines were stripped; tre
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 28 THE BED SPIDER ON HOPS IN CALIFORNIA. BANDING WITH TANGLEFOOT. Banding with tanglefoot has become the chief method of control- ling the hop flea-beetle (Psylliodes punctulata Melsh.) in British Columbia, and as the mites also work up the vine mainly by crawling it was deemed advisable to attempt to check their progress by means of the tanglefoot bands. In order to test this method, 10 infested hop vines were selected. A few leaves were removed to prevent bridging, and in some cases the vines were stripped; tree tanglefoot was then applied to the vines in 3- inch bands. (See fig. 6.) About 20 badly infested leaves were next at- tached to the vines below the bands and the lower parts thus thoroughly infested. During the following week these vines were continuously ob- served. Hundreds of mites were found around the lower edges of the bands, and in cases where the lower leaves had been stripped off some web was found at the base of the tanglefoot, but there was no evidence that the mites had crossed over. Although mites were seen above the bands, these probably were car- ried there on the observer's hands during previous observations. Similar experiments were con- ducted, in 1912, except that some foliage was left below the bands on which the mites could multiply and from which they could migrate. Three weeks' observation failed to reveal mites above properly banded vines, but after this time the tanglefoot became filled with sand and was not effective. One large-scale experiment with tanglefoot was attempted, but the work was done so late in the season that a few mites were already above the point of banding and no definite results could be obtained. Banding with tanglefoot in itself will probably not act as a control for the red spider, but in yards where late clean culture is not practi- cable it will probably protect the sprayed vines from the late summer migrations. Application.
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