File:Control of field rodents on California farms (1965) (20071157473).jpg

Title: Control of field rodents on California farms
Identifier: controloffieldro535stor (find matches)
Year: 1965 (1960s)
Authors: Storer, Tracy I. (Tracy Irwin), 1889-1973; Jameson, E. W. (Everett Williams), 1921-
Subjects: Rodents
Publisher: (Berkeley, Calif. ) : Division of Agricultural Sciences, University of California
Contributing Library: University of California, Davis Libraries
Digitizing Sponsor: University of California, Davis Libraries

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Text Appearing Before Image:
12 - COUPLING o Fig. 7. Probe for locating pocket gopher tunnels to insert poisoned baits. The shaft may be in one piece or divided by a pipe coupling for convenience in carrying when not in use. opening by rotating the probe, or by using its larger end, and then drop in a piece or two of poisoned bait. Put baits in each tunnel at two slightly separated places, then close the hole with your heel. As the work proceeds, tramp down or kick off the tops of all mounds so that new mounds made by surviving gophers ran be easily seen and additional baits can be put into the tunnels as needed. About 40 per cent more baits are taken when inserted into an opening made by a probe than when tunnels are opened by a shovel or spoon. The probe method is also faster: a trained man using a probe can treat several hundred holes in a single day. Probing is easiest when the soil is damp and soft down to the level of the
Text Appearing After Image:
Fig. 8. Use of probe for placing pocket gopher baits; when pushed into the ground, if the probe suddenly drops about 2 inches, a main tunnel has been located; then the probe hole is made large enough to insert a poisoned bait. (16)

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