Fig. 2.

Dual choice assays of western flower thrips on chrysanthemum leaf disks sprayed with 0.2 % Tween (control) or 0.2 % Tween with 0.01 %, 0.1 % or 1 % pyrethrins. The presence on either leaf disk was visually recorded 0.25, 1, 2, 4, 20 and 28 h after WFT release. The x-axis represents ¹⁰log-transformed time data. Asterisks indicate significant differences to the control (*: P < 0.05; **: P < 0.01). C, control. Pyr, pyrethrins. Error bars indicate SE (N = 120 per treatment)