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SAMPLING TECHNIQUES

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.

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SAMPLING TECHNIQUES

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  1. SAMPLING TECHNIQUES

  2. 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

  3. 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

  4. STEINER TRAP • Used chemical lure • Methyl eugenol & Cue-lure (Bactrocera spp) • Traps attached to tree branches Standard steiner trap Modified (1.5L Plastic bottle) wire Cotton with ME small holes around bottle

  5. MALAISE TRAP Collecting bottle with alcohol • tent-like structure • trapping flying insects • Hymenoptera & Diptera • Insects fly into net & hit middle mesh • Fly upward into collecting bottle containing alcohol

  6. SWEEP NET • not difficult but requires practice to become efficient • the net handle directed forward and the net opening pointed sideways • zig-zag

  7. LIGHT TRAP • Nocturnal insects • fluorescent bulbs • or bulbs emit ultraviolet wavelengths (black lights)

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