Insects and insecticidesA practical manual concerning noxious insects and the methods of preventing their injuries . phinx (Phlegethon-tius Carolina). In the Southern States, and even asfar north as central Ohio, there are two broods eachseason. The Tomato Worm is subject to the attacks of asmall, four-winged, black fly that deposits eggs be-neath its skin along the back. The eggs hatch intolittle maggots that absorb the body juices of theworm, developing at its expense, and finally comingout upon its back, where they spin white, silkencocoons (Fig. 86), within which they change to
Insects and insecticidesA practical manual concerning noxious insects and the methods of preventing their injuries . phinx (Phlegethon-tius Carolina). In the Southern States, and even asfar north as central Ohio, there are two broods eachseason. The Tomato Worm is subject to the attacks of asmall, four-winged, black fly that deposits eggs be-neath its skin along the back. The eggs hatch intolittle maggots that absorb the body juices of theworm, developing at its expense, and finally comingout upon its back, where they spin white, silkencocoons (Fig. 86), within which they change to afterward they again change to flies thatgnaw out of the cocoons and fly away to continuethe work of destruction. The caterpillar lingersawhile in a half dead condition, and finally dies. INJURING THE LEAVES. 167 Remedies.—Hand-picking the worms is the mosteffective remedy for garden patches. Their depre-dations are so conspicuous that-it is generally easy tofind them. The moths may be destroyed (and conse-quently the deposition of eggs prevented) by smear-ing flat boards in various parts of the field with. Fig, 86. Tomato Worm with cocoons of parasite. molasses mixed with stale beer, to which a little flypoison has been added. The boards should be a footor two from the ground. Another method which isespecially recommended for killing the moths intobacco fields, is to plant at occasional intervals in thefield seed of Jamestown Weed (Datura stramonium)about the time the tobacco is put out. These willcome in blossom when the moths appear. If a littlefly poison, mixed with sweetened water and whisky,be poured in the long blossoms each evening, themoths that sip the liquid will be killed. INSECTS AFFECTING THE POTATO. INJURING THE STEM. The Potato Stalk-weevil. Trichobaris trinotata. Potato stems are sometimes infested by a whitishor yellowish-white, footless grub, about a quarter ofan inch long, which burrows in the heart of thestalk, especially near the ground, and causes th
Size: 1860px × 1344px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, bookidi, booksubjectinsecticides
