According to the analysis of the average counts and efficiency of treatment, as shown in Table 1, there was no significant difference between the four groups, regarding counts on day 1. As from day 3, the products started to show an influence on the counts, when compared to the control (untreated) group. This effect persisted until day 28, with the treated groups showing statistically significant differences compared with the control group, with the sole exception of abamectin on day 14.