SAMPLING TECHNIQUES

PITFALL TRAPS

• adaptation of primitive hunting techniques

• consist of a plastic cup • a hole is dug in the ground • the trap is sunk into the soil • the mouth is level with soil surface. • ground dwelling arthropods• Medium: soap

YELLOW PAN TRAP

• A tray sprayed with bright yellow colour• most insects attracted to bright yellow. • liquid detergent added to break the surface

tension of the water • insects will drown• Collection: the best daily• Long period: Salt is added• Placed flat on the ground

optional

STEINER TRAP

• Used chemical lure• Methyl eugenol & Cue-lure (Bactrocera

spp)• Traps attached to tree branches

Standard steiner trap Modified (1.5L Plastic bottle)

small holesaround bottle

Cottonwith ME

wire

MALAISE TRAP• tent-like structure • trapping flying insects• Hymenoptera & Diptera• Insects fly into net &

hit middle mesh• Fly upward into collecting

bottle containing alcohol

Collecting bottle with alcohol

SWEEP NET

• not difficult but requires practice to become efficient

• the net handle directed forward and the net opening pointed sideways

• zig-zag

LIGHT TRAP

• Nocturnal insects

• fluorescent bulbs

• or bulbs emit ultraviolet wavelengths (black lights)

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