Table 1
Adhesives and diet mixture presented to booklice with results summary.
| Experiment set-up | Results summary | ||
|---|---|---|---|
| Adhesive/diet mixture introduced to filter paper in Petri dish | Number of dishes prepared | Mean number of surviving insects per dish (± SEM) after ten months | Notes |
| SBGa | 10 | 7 ± 1 | |
| PVA1b | 10 | 1 ± 1 | |
| PVA2c | 10 | 0 | |
| Diet mixtured | 10 | See note | The dishes became overcrowded with insects one month after their introduction and so this experiment set-up was halted. |
| Control (paper only) | 10 | 13 ± 2 | |
[i] aSBG: ‘Pritt Stick’ solvent free adhesive. Henkel Consumer adhesives, Hemel Hempstead, UK. Starch adhesive with sugar binders.
bPVA1: Archival quality, neutral pH PVA adhesive. Lineco Inc., Holyoke, MA, USA. Item 901–1008 1.
cPVA2: Conservation grade PVA M218 adhesive. J. Hewit and Sons, Livingston, UK.
dDiet mixture: 1:1:1:1 mixture – by weight – of brewer’s yeast, dried skimmed milk powder, wheatgerm and wholemeal flour.
Figure 1
A representative close-up of the fungal colony growing on the diet mixture and paper after incubation for 61 days.
Figure 2
Mean number of surviving insects per dish (± SEM) with the time of exposure to either incubated paper or incubated paper and adhesives.
Figure 3
Condition of different paper and adhesive combinations after incubation for 244 daysΨ. Ψ 2, 3 & 10 = Pritt stick adhesive; 18 = Lineco PVA adhesive; 25, 27 & 29 = Hewit PVA adhesive.
Figure 4
Condition of adhesive paper and adhesive combinations (a) and paper only (b) after incubation for twelve monthsΨ. Ψ 9 = Pritt stick adhesive; 12, 15 & 16 = Lineco PVA adhesive; 27 & 30 = Hewit PVA adhesive.