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Responses of Amblyomma sculptum nymphs (n = 36) to an attractant, ammonium hydroxide (AH), and to a mixture of an attractant and a repellent (E)-2-octenal in Y-tube olfactometer assays. *Significant effect of the chemical using a Chi-square test (p < 0.05) on 1 ° of freedom. Full results from the olfactometer assays, detailing counts of nymphs, Chi-squared statistics and p-values are given in Table S3 and S4 (Supplementary Information).
