. Class book of economic entomology, with special reference to the economic insects of the northern United States and Canada. Beneficial insects; Insect pests; Insects; Insects. THE CONTROL OF INJURIOUS INSECTS 397 above the ground, the frames holding the screens should be placed in position soon after the plants are set out or the seeds planted. They can be readily removed for a short time whenever weeding, cultivation and watering are necessary. (c) Wire-netting.—Wire-netting is often placed about trees to protect them from the Peach-borer, and the Round-headed apple tree Fig. 251.—T
. Class book of economic entomology, with special reference to the economic insects of the northern United States and Canada. Beneficial insects; Insect pests; Insects; Insects. THE CONTROL OF INJURIOUS INSECTS 397 above the ground, the frames holding the screens should be placed in position soon after the plants are set out or the seeds planted. They can be readily removed for a short time whenever weeding, cultivation and watering are necessary. (c) Wire-netting.—Wire-netting is often placed about trees to protect them from the Peach-borer, and the Round-headed apple tree Fig. 251.—Tool and device for cutting disks. (AJtci- Britlon.) {d) Single-ply Tar Felt Paper Disks.—Used to protect cabbage and cauUfiower plants against the cabbage-root maggot (Figs. 251-253). 6. The Use of Traps, Trap Crops, Etc. The following forms of traps are sometimes used to advantage: (a) boards or chips; (b) special crops; (r) poison baits. (a) Boards or Chips.—Squash bugs, cutworms and other insects may be readily trapped in large numbers by placing small bits of board or chips or bunches of grass among the rows of plants where these insects Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Lochhead, William, 1864-. Philadelphia, Blakiston
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsects, bookyear1919
