. Principles of plant culture; an elementary treatise designed as a text-book for beginners in agriculture and horticulture. Horticulture; Botany. 176 Pmiciples of Plant Culture. this class are difficult to control, since they are mostly beyond the reach of insecticides. 311. Borers that infest the trunks and main branches of trees, may often be kept out by applying strong al- kaline washes to these parts. Soft soap reduced to the consistency of thick paste by a strong solu- tion of washing soda, applied to the trunk or branches, forms a rather tenacious coat- ing which repels the female insec
. Principles of plant culture; an elementary treatise designed as a text-book for beginners in agriculture and horticulture. Horticulture; Botany. 176 Pmiciples of Plant Culture. this class are difficult to control, since they are mostly beyond the reach of insecticides. 311. Borers that infest the trunks and main branches of trees, may often be kept out by applying strong al- kaline washes to these parts. Soft soap reduced to the consistency of thick paste by a strong solu- tion of washing soda, applied to the trunk or branches, forms a rather tenacious coat- ing which repels the female insect. Paint- ing the trunks of small apple trees a short distance above and below the surface of the ground with common paint or pine tar, is said to prevent the entrance of the round- headed borer (306). Protect- ing the trunk with straw or lath, as recommended to pre- vent sun-scald (185) may tend to keep out these insects. fig. 75. fig. 73. fig. 74. Borers in thp ^"'' ^^' Card of tarred paper, for placing about the stems of young cabbage and canli- +-i»nTi1r oon nfton flower plants. Reduced one-balf. uiuuii ci7 ^K*- '^5. Manner of using the tool. The ue uy dotted lines show the position of the edge of probing their '""^ *<"" ™ ^"'^ p^p"- holes with a flexible twig. 312. Leaf-Miners often infest spinach and beets grown for greens, rendering the leaves unfit for use. For these insects we can offer no preventive measures of established value. The application to the young foliage of powerful odorants, as coal-tar water or a solution of carbolic acid, may prove Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Goff, E. S. (Emmett Stull), 1852-1902. Madison, Wis. University Co-operative Co.
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