. The encyclopedia of practical horticulture; a reference system of commercial horticulture, covering the practical and scientific phases of horticulture, with special reference to fruits and vegetables;. Gardening; Fruit-culture; Vegetable gardening. WALNUT PESTS 2015. Pig. 2. Mouse Injury to Nut Tree. —H. R. Oossard. duced. Then more winged forms appear, which produce true males and females. The males have wings but the females are wingless. Copulation takes place and the overwinter eggs are deposited by the females about the buds on the young shoots. Remedies Spray with "Black Leaf-40&
. The encyclopedia of practical horticulture; a reference system of commercial horticulture, covering the practical and scientific phases of horticulture, with special reference to fruits and vegetables;. Gardening; Fruit-culture; Vegetable gardening. WALNUT PESTS 2015. Pig. 2. Mouse Injury to Nut Tree. —H. R. Oossard. duced. Then more winged forms appear, which produce true males and females. The males have wings but the females are wingless. Copulation takes place and the overwinter eggs are deposited by the females about the buds on the young shoots. Remedies Spray with "Black Leaf-40" or kerosene emulsion 10 per cent. Walnut Caterpillar Datana integerrima Gr. & Rob. The walnut caterpillar does much in- jury to the walnut, butternut, hickory and pecan trees in the Mississippi states by eating their leaves and in many cases completely defoliating the trees. When full grown, the caterpillar is about two and one-half inches long, dark, nearly black in color, and sparsely covered with long, silky, white hairs. The eggs are of dull white color, and are laid in masses of from 200 to 300 on the undersides of leaves. (Pig. 1.) The caterpillars feed in large numbers, clustered together. They first work on one leaf, then on a branch, completely cleaning them up as they go. The moth has a body measuring three-fourths of an inch long and wings when spread measuring one and five- eighths inches in the male to one and seven-eighths in the female. The fore wings are of light brown color crossed by four darker brown lines; the hind wings are of pale yellowish color, un- marked. The winter is passed in the chrysalid stage in the ground. Remedies While the caterpillars are still young and feeding upon the leaves, they may be destroyed by spraying with arsenate of lead at the rate of from two to three pounds to 50 gallons of water. After the caterpillars have come down the tree and clustered there to molt, the mass may be burned or crushed. Parasites such as the Tac
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