. Better fruit. Fruit-culture. November, 1920 BETTER FRUIT The Orchard Leaf Roller—How to Control It By A. L. Melander, Entomologist State College, Pullman, Washington WITHOUT attempting to decide whether the chicken or the egg came first, we may say that the leaf roller begins its life cycle in the egg stage during the summer. The eggs are glued in flat masses on the bark of the branches, twigs or trunk, at first, greenish, almost bark-colored, but becoming whitish after hatching. The masses vary in size from an eighth to a quarter inch in diameter and contain , li .*dH& •-*..* % tA^ -•V
. Better fruit. Fruit-culture. November, 1920 BETTER FRUIT The Orchard Leaf Roller—How to Control It By A. L. Melander, Entomologist State College, Pullman, Washington WITHOUT attempting to decide whether the chicken or the egg came first, we may say that the leaf roller begins its life cycle in the egg stage during the summer. The eggs are glued in flat masses on the bark of the branches, twigs or trunk, at first, greenish, almost bark-colored, but becoming whitish after hatching. The masses vary in size from an eighth to a quarter inch in diameter and contain , li .*dH& •-*..* % tA^ -•V s How the Leaf Roller Works. This insect has gained its name by its habit of curling Ihe leaves. an average of about forty or fifty eggs. The eggs may remain on the bark for a couple of years, the old ones being rec- ognizable by their color, and by being perforated with the exit-holes where the hatching worms emerge. It is in the egg condition that the leaf roller spends the winter. When the trees are well in leaf the following spring hatching begins. The worms are at first very small, a six- teenth of an inch long, greenish in color and with a black head. At the time apples blossoms are opening the worms move into the blossoms, usually one to each blossom, and proceed to nibble at. the vital parts of the flowers. This causes the flowers to drop so badly that an infested tFee will set no fruit even though it might blossom heavily. From then until after midsummer the worms can be found, skeletonizing the Page 7 leaves, rolling up a leaf here and there, and where abundant completely defoli- ating the trees. The green worms are very sensitive and when touched wrig- gle rapidly out of the way or spin their way to the ground on a thread of silk. The pupa is practically naked and placed in the leaf-nests. Moths appear after midsummer, hiding during the day among the trees, but flying actively at KIRK'S MILITARY SHOP The Crumpled Nest of the Leaf Roller, Shov How It Destroys th
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