Effects of sticky trap colour, UV illumination and within-trap variation on tomato potato psyllid captures in glasshouses

Figures & data

Figure 1. Representation of 30 × 25 cm yellow sticky trap (in landscape orientation), divided into 12 columns, 10 rows, and 120 2.5 × 2.5 cm squares.

Figure 2. TPP collected (TPP.cm⁻²) on different coloured sticky traps over a 7 d period under natural light conditions in a heavily infested glasshouse tomato crop.

Figure 3. The (A) density (TPP.cm⁻²) and (B) coefficient of variation (%) of TPP collected over 7 d on yellow sticky traps set at different heights in a glasshouse containing a heavily infested tomato crop.

Figure 4. TPP collected (TPP.cm⁻²) on different coloured sticky traps with UV illumination over a 7 d period in a heavily infested glasshouse tomato crop.

Figure 5. Heat maps illustrating relative TPP counts in each 2.5 cm square on a yellow sticky trap for seven sampling periods (7 d). Traps were maintained under normal glasshouse light conditions or under a UV lamp. Scale ranges from deep red (highest count) to dark blue (lowest count) for that trap.

Figure 6. The effect of distance from the trap edge on the mean (standardised count) and variation (CV%) of TPP on yellow sticky traps collected over 7 d under (A,C) normal glasshouse light conditions and (B, D) under UV illumination. Different circle shades represent data from different weekly sampling periods.

Figure 7. Relationships between the numbers of Inner Board 2.5 cm squares used for TPP assessment and the proportion of simulated estimates that were a given deviance from the actual mean count for seven sampling periods (7 d). Traps were maintained under normal glasshouse conditions or under a UV lamp.