Ag site traps are placed lengthwise along the "toe" of one berm, not on the crest of berms, or across the crop spaces between berms. Agricultural Sites (currently there are none):Īt ag sites, dig a fresh trap line into the dirt and use TWO cups, one to "hold" the place and the other inside it to "collect" the arthropods. Take note if any lids are missing so that you can replace it/them to ensure that there is a lid for each trap when you return to close the traps on Day 4. Collect the trap lids and bring back to the lab until traps are collected on Day 4. Cups can also be removed at the time of collection and replaced when traps are set the following quarter. If the cup is missing, very dirty, or damaged, replace with a new one.
#PITFALL TRAP DATASHEET FREE#
Remove the lid from the trap and ensure the plastic cup is clean and free of any debris or dead insects. 4oz 70% ethanol-filled kill jars (1 for each trap set).For agricultural sites: auger, pickaxe, soil knife, sledge hammer, clear plastic cups.Pitfall traps folder (contains directions, maps, residential access forms).Field Equipment Checklist: For trap installation: Scorpions may be encountered at the desert sites - take caution when removing the trap lids, when removing the cup from the ground (they are sometimes found underneath the cup on the ground in the pipe), and when collecting the trap.Ī minimum of 7 traps must be collected on Day 4, otherwise that location should be reset or disregarded for that collection cycle.
After filtering the water, always rinse the netting into the jar with a wash bottle to collect any insects that may have stuck to it (even if you can't see any insects). If there is water in the cup (from rain or landscape watering), a piece of plankton netting is used to filter out the water. Sometimes the pipes get dug out of the ground by animals or humans and need to be replaced.ĭo not set traps when it is raining, when heavy rain is expected, or when flood irrigation is due. Take a few extra 4" sewer pipes into the field each time. It does not matter in what order the pitfall sites are visited but the sites are grouped geographically. Traps are set (opened) on Day 1 and collected (closed) on Day 4 each quarter (January, April, July, and October). During a given collection cycle, a maximum of two ag sites can be disregarded if the collection is not successful (due to irrigation, tilling, or other disturbance). Plastic cups are doubled-up and placed in each hole, flush with the ground, and then removed after collection. For each visit, a fresh trap line is dug into the dirt. Agricultural Sites (currently there are none):Īt agricultural sites, there are no pipes in the ground. Lids are spray-painted green for traps located in lawns. When not set, traps are covered with a 4" sewer pipe cap (lid).
Traps are usually ~5 meters apart on a straight line, except at residential sites. If the number drops below this, please let the CAP LTER Site Manager know. The trap lining and the plastic cup should be flush with the ground. Traps are lined with 4" PVC sewer pipe cut to a length of 5 inches, which will accept an 18oz plastic cup. Pitfall trap holes can be cored using a small soil corer or an auger, usually in turf, or dug out using a pick or a soil knife along with a sledge hammer and a small spade, in more difficult-to-excavate soil such as desert hardpan.
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