. Control of field rodents in California. Rodents; Mammals. Fig. 13.—Traps for pocket gophers. All are shown as set, with front end (at right), which is to be put foremost into burrow. A, Macabee trap; B, modified Macabee trap, for moles and for gophers that are hard to trap; C-G, miscellaneous types; H, California pocket-gopher trap of wood. ward at right angles to its former position so that it will lie parallel with the trap, instead of standing up at right angles to the runway (fig. 13, B). Set the trap so that it will spring easily. Put a bit of loose cotton under the treadle to keep out
. Control of field rodents in California. Rodents; Mammals. Fig. 13.—Traps for pocket gophers. All are shown as set, with front end (at right), which is to be put foremost into burrow. A, Macabee trap; B, modified Macabee trap, for moles and for gophers that are hard to trap; C-G, miscellaneous types; H, California pocket-gopher trap of wood. ward at right angles to its former position so that it will lie parallel with the trap, instead of standing up at right angles to the runway (fig. 13, B). Set the trap so that it will spring easily. Put a bit of loose cotton under the treadle to keep out dirt, place the trap in the run, and cover the whole trap lightly with a thin layer of loose earth. After having put out traps, tramp down or kick the tops off all mounds nearby so that on the next visit any new mounds will show where gophers remain and where further effort is needed. Poison Baits. Pocket gophers may be killed in numbers by use of poison bait. Since their external cheek pouches or pockets are lined with fur, no poison can be absorbed there as with ground squirrels, and dependence must be placed on stomach poisons. Strychnine alkaloid or sulfate is effective for this purpose. The bait must be something relished by gophers and must be placed in the main runs with as little disturbance as possible; if placed on the sur- face of the ground it would not often be found by gophers and might be a menace to other animals, wild or domestic; and if put into laterals or open holes it may be buried or pushed out in the dirt. Root vegetables dusted with strychnine are the commonest bait used (formula 5). These baits are made of such size that they cannot be carried in the cheek pouches; the gopher must cut them first, and thereby is poisoned. Dried fruits (formula 6), grains (either hulled or crushed), and fresh alfalfa are used at times. It is no longer consid- ered necessary to sweeten the material to disguise the Please note that these images are extracted from
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