The Bi Monthly Zoological Bulletin Of The Division Of Zoology Of The Pennsylvania Department Of Agriculture Volume 2 PDF Download

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1912 edition. Excerpt: ... This decay spreads and finally involves the entire fruit. It is more prevalent on rough skinned varieties with an imperfect blossom end. Control: Select smooth, resistant varieties and support stalks on trellises. TIMOTHY. I. Chewing Insects. White Qrtib. (See under CORN). II. Sucking Insects. Thrips. (See under OATS). III. Plant Diseases of Timothy Ergot. See under RYE). WHEAT. I. Chewing Insects. Wheat-head Army-Wo-rm. This is a light colored larva, striped with yellow, about an inch in length, feeding upon the seeds of wheat, rye and other grasses, making it appearance in destructive numbers about the time the grain is ripening. The adult moth is of a pale gray color, with a silver-gray margin to the outer edge of the fore wing. Control: If the grain is sufficiently ripe, harvest and thus prevent further injury. Spray infested plants with kerosene emulsion (No. 32 a). Protect toads, lizards, frogs, turtles and birds, which feed upon these insects. Wheat Midge. This insect very much resembles the Hessian fly in shape and size. The eggs are deposited in the crevices between the chaff in the wheat heads, a few weeks before harvest time. From these hatch minute white maggots which burrow into the kernels. They become full grown in three or four weeks, and pupate in the ground where they spend the winter. Control: Practice fall plowing thus destroying the pupw in the ground. II. Sucking Insects. Hessian Fly. This is the most destructive insect pest of wheat in this State, the crop of 1911 Laving been damaged to the extent of millions of dollars. So severe was the injury to the wheat fields of certain sections that the crop harvested was less than one-fourth of a normal yield. The Hessian Fly is always present with us in greater or smaller...