. Insect pests of farm, garden and orchard . -substance. It is a pale rust-brown color, about one-third inchlong, of a broad oval shape, and usually concealed on young egg hatches in two or three weeks. The young larva? tunneljust under the bark on the sap-wood, usually working downtoward the base of the tree, the bark over these burrows often. Fig. 444.—The round-headed apple-tree borer (Saperda Candida Fab.)larv£e, adults, and exit hole—natural size. (After Rumsey and Brooks). cracking the next spring, and the fine castings and Ijorings siftingout. At the beginning of the second ye
. Insect pests of farm, garden and orchard . -substance. It is a pale rust-brown color, about one-third inchlong, of a broad oval shape, and usually concealed on young egg hatches in two or three weeks. The young larva? tunneljust under the bark on the sap-wood, usually working downtoward the base of the tree, the bark over these burrows often. Fig. 444.—The round-headed apple-tree borer (Saperda Candida Fab.)larv£e, adults, and exit hole—natural size. (After Rumsey and Brooks). cracking the next spring, and the fine castings and Ijorings siftingout. At the beginning of the second year the larva is aboutfive-eighths inch long. The larva continues in the sap-woodduring the second season, and it is at this time the most seriousdamage is done, for where several occur in a tree they almostgirdle it. The next season they penetrate into the heart-wood,and several of them will fairly riddle a small tree with theircylindrical borrows. The full-grown larva continues this burrow 590 INSECT PESTS OF FARM, GARDEN AND ORCHARD out into the bark, often cutting clear across a tree. The upperpart of the burrows are stuffed with fine borings and the lowerpart with long wood fibres. The full-grown larva is a lightyellowish, cylindrical grul3, al^out three-quarters inch long. Thehead is small, legs are lacking, and the liody tapers gradual
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyo, bookyear1915
