Table 2.

Residual contact toxicity of Tetranychu urticae at the highest concentration for different periods. Each datum represents the mean of five replicates, each set up with 20 pre-adults (n = 100). In the same column, means followed by the same letters are not significantly different (p < 0.05) as determined by tukey’s studentized range (HSD) test.

Treatment	% Mortality (mean ± S.E.) after different period (days)
	3	6	9	12	15	18	21	24	27	30
diflubenzuron	82.7 ± 0.5b	78.7 ± 0.6a	61.33 ± 0.4b	57.3 ± 0.2b	54 ± 0.4b	44 ± 0.4b	21.3 ± 0.9b	10.7 ± 0.5b	13.3 ± 0.3b	13.3 ± 0.5b
diflubenzuron@NPs	90.6 ± 0.5a	74.7 ± 0.8a	80.0 ± 0.70a	77.3 ± 0.4a	62.7 ± 0.2a	65.3 ± 0.4a	48 ± 0.37a	36 ± 0.5a	34.7 ± 0.7a	26.7 ± 0.4a