Insects and insecticidesA practical manual concerning noxious insects and the methods of preventing their injuries . size and moulting three times during theperiod. The larvae, like the beetles, are mostly noc-turnal in their habits, and ordinarily remain con-cealed during the day. The full grown larvse formpale yellow cocoons, consisting of a coarse networkof silk (/, g) in the soil, just beneath the pupate (h) within these cocoons, and a monthlater emerge as beetles. There is apparently but onebrood each season, although it is possible that theremay sometimes be two. During the
Insects and insecticidesA practical manual concerning noxious insects and the methods of preventing their injuries . size and moulting three times during theperiod. The larvae, like the beetles, are mostly noc-turnal in their habits, and ordinarily remain con-cealed during the day. The full grown larvse formpale yellow cocoons, consisting of a coarse networkof silk (/, g) in the soil, just beneath the pupate (h) within these cocoons, and a monthlater emerge as beetles. There is apparently but onebrood each season, although it is possible that theremay sometimes be two. During the early summermonths (May and June) it is mostly in its immaturestages. It ordinarily hibernates as an adult, butmay also occasionally pass, the winter in the otherstages of its existence. Remedies.—The only remedy yet suggested isthat of plowing under infested fields during May orJune, thus destroying the immature stages. INJURING THE HEAD. The Clover Seed-midge. Clover Seed-midge is a small, orange-coloredmaggot that develops in the clover heads at the 238 INSECTS AFFECTING expense of the young seeds. It hatches from eggs laid by a very small, two-winged fly (Fig. 127,a), similar to theHessian Fly in ap-pearance. The fe-male is providedwith a long oviposi-tor with which shepushes her eggs inamong the youngflowers. When the Fig. 127. Clover |eednmidge: a, fly; ^ larva. larya {& fuU g]wn (b) it wriggles its way out of the head and falls tothe ground, where at or just beneath the soil surface,it forms a slight cocoon, within which it changes tothe pupa state. About ten days later the flies emergeto lay eggs for another brood. In the NorthernStates there are two broods each season, while at theSouth there are at least three, and possibly fields infested by this insect are at once dis-tinguished by the unnatural condition of the headsat time of blossoming: instead of being red withbloom, the heads are green and dwarfed on accountof t
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Keywords: ., bookcentury1800, bookdecade1890, bookidi, booksubjectinsecticides
