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Image 84 of Annual report. 1908

Part of Kentucky Agricultural Experiment Station

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;· Ti V Spraying Apple Trees. 59 , j I have sometimes passed, along rows of young apple trees and of cowpeas with a "sweep-net" striking the-net against the foliage y i back and forthyas I passed and found that thousands of the insects y ; could be quickly collected, and that going over the plants a second Q time showed them nearly all gone, most having been captured, the l n rest flown away. I believe that for small blocks of trees this would T { sometimes prove a very satisfactory method of relieving the foliage I I of the pest. The insects could be very easily destroyed by crushing I it them while still in the net, or by emptying them into a bucket of i I waterhaving a little coal oil on the surface. y - THE BUFFALO TREE-HOPPER. (Oeresa bubalus). ` SJ The twigs and branches of apple trees are sometimes punctured l by an angular green bug from about 0.32 to 0.44 inch in length to y ‘ ‘ the tips of the folded wings. The head is small and inferior in Y position, while the crust of the next division (prothorax) is greatly `· enlarged and expanded in front, with a pair of short spines pro- ig J jecting out on each side, somewhat like the horns of a Durham bull. , Behind, the thorax tapers rapidly to a sharp point ovcrhanging it the abdomen. The wings are thin and membraVnous. . ` i A The insect punctures plants like the other members of the order, ij but its chief injury, at any rate the one which draws attention to it, n is done by puncturing the twigs to place its eggs. These punctures . ¤ are very characteristic. The eggs are thrust under the bark in two TE; V Y short, slightly curved lines, only about 0.12 inch apart, where they remain over winter. The subsequent growth of the bark causes {Q the wounds thus made to open up, and when numerous the whole y V surface becomes rough, the smaller branches sometimes break off, lil M and the growth and general vigor of the tree is impaired. The ti · _ 6ggS are laid in late summer and in the fall and hatch the following V Semis- V Q3-; r The injury is only severe in orchards that are not well eared e t for. If a growth of weeds and other succulent vegetation isper- . Q · mitted to occupy the orchard, these insects are very likely to gather V there, for the adults are generally found feeding on such plants. p In orchards kept cultivated and free from weeds, no serious mis- y { chief is done. and the insect does not require treatment. The first $ t 5 1 l 2

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