A mobile insect-collecting trap

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Material Information

Title:
A mobile insect-collecting trap
Physical Description:
Mixed Material
Creator:
Douglass, J. R ( James Robert )
Bean, E. H
United States -- Bureau of Entomology and Plant Quarantine
Publisher:
U.S. Department of Agriculture, Bureau of Entomology and Plant Quarantine ( Washington, D.C )
Publication Date:

Record Information

Rights Management:
All applicable rights reserved by the source institution and holding location.
Resource Identifier:
aleph - 030345099
oclc - 781626280
System ID:
AA00017463:00001


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Full Text

May 1939


United StatLS Dcpatmenit of A -iculture
Bureau of Entomology and Plant Quarantine


A MOBILE II;SECT-C'LLh.L.i .; TRAP

By J. R. Dougloss and E. H. Bean, .'ivl.-io:i of Truck
Crop and Garden Iiins.-t I.v,.-.tirations I/




Each fall for a ,iril-Er of ,^a:'s the beet leifhopper (Eutettix
tenellus (Bak.)) has been collected in ln1"rge iiumiers, by the sweep-
net method, for hibernation studies and other investigation al work.
Where the number of female insects desired ',..? in excess of 30,000
it required ',he work of four or five workers for a period of from
1 to 2 weeks, depending ;ipon the ab,'"l.:.nce of the insect, the tem-
perature, and the wind velocity. The tr-p herein described was
constructed to replace the method of sweep-net collection and to
permit collecting on days when the sweep net is practically valueless
as a collecting device.

Construction

The following material was used in constructing the trap:

1 piece clear pine (sides), 1/2" x 12" x 16'
1 piece 3-ply wood (bottom), 1/4" x 36" x 4'
1 piece clear pine (braces), 3/8" x 3-1/4" x 10'
1 piece clear pine (bearings and bottom reinforcemernts),
1" x 6" x 6'
1 piece clear fir (pole), 2" x 4" x 10'
2 pieces hardwood (runners), 1" x 1" x 8"
Screen moulding, 15 linear feet
1 piece mesh wire (30-mes'i), 36" x 48"
1 piece mesh wire (1-inch mesh), 12" x 36"
1 axle, 1/2" x 47"
2 wheels, 5-1/2"
2 tires, 10" x 2.75"
1 piece sheet metal, 12" x 24"
2 bolts, 1/2" x 5"

The trap was -onstructed acco '.'i:. to the diagr-ams in figures
1 and 2. The appta:a-:..:e can be improved and the weight reduced by


_/ The writers a:-e indebt... .: F. H. Harries for the
drawings.


ET-146





-2-


bringing in the sides to form the throat, thereby streamlining the
cage. A hardware-cloth screen should be inserted in about the
middle of the trap to prevent plant material from going back into
the throat and the cloth bag. The air draft can be changed by
using different materials to cover the top, thus changing the amount
of air going through it.

Operation

The 2 by 4 inch pole was bolted to the front bumper of a car
with the hitch end to the left, and the trap was hitched to the
pole with wire cable, as shown in figure 3. The height of the trap
was adjusted by placing the axle through the proper hole bored
through both sides of the trap and bearing boards. The trap was
hitched on the left side of the car to permit better observation
by the driver of the car. The hitch was adjusted so as to prevent
the trap from running under the car while turning. A small cloth
bag was placed over the rear opening and fastened to the trap by a
hook and a piece of inner tubing. The truck (fig. 4) was driven
over the area at 15 or 20 miles per hour, and the air current
forced the insects that moved in front of the trap back through the
trap into the bag. At intervals the contents of the sack were dumped
into cardboard tubes, and a cage was placed over the open end,
into which the insects moved. On cool days the tubes can be warmed,
thereby increasing the activity of the insects.

Effect on Leafhoppers

It seemed to members of the Twin Falls laboratory staff
that leafhoppers collected by this method were not injured so much
as when they were collected with the sweep net.

Uses

This type of trap can be used on range and abandoned lands,
where cars can be driven, to collect large numbers of insects. For
survey work it can be used in determining the occurrence and popu-
lation of certain insects.









4'- 0"


q I X 2.7 WHEEL


I-U6


BOTTOM O PLYWOOD
BOTTOM OF 4PLYWOOD


COIL SPRING
AND HOOK


30 MESH SCREEN
OVER ENTIRE TOP


TOP VIEW


Figure 1.-Plan of trap for collecting insects.


CABLE


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Digitized by the Internet Archive
in 2012 with funding from
University of Florida, George A. Smathers Libraries with support from LYRASIS and the Sloan Foundation


http://archive.org/details/mobilein00unit











































Figure 2.--Front, side, and rear views of trap showing construction.













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Figure 3.--Side view 'of trap showing hitch.


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Figure 4.-Trap in operation.


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UNIVERSITY OF FLORIDA


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