. Author manuscript; available in PMC: 2012 Dec 26.

Published in final edited form as: J Med Entomol. 2012 Mar;49(2):336–342. doi: 10.1603/me11178

Table 1.

Comparative development of lice that hatched from 0- to 8-d old eggs (0-2, 3-5, and 6-8 egg groups combined) treated with ddH₂O, Nix, NYDA, or NYDA without fragrances

Measurements	Treatments
Measurements	ddH₂O¹	Nix^a	NYDA^a,c	NYDA without fragrance^a,c
Development time from egg hatch to adults (days)	11.8 ± 1.3^a,b	11.9 ± 0.9^a	12.1 ± 0.9^a	12.4 ± 1.6^a
Longevity of adults (days)	11.63 ± 1.0^a	12.7 ± 1.3^a	7.7 ± 1.0^b	9.6 ± 0.9^a
Female fecundity (eggs/female/days)	2.9 ± 0.3^a	2.9 ± 0.5^a	2.3 ± 0.3^a	3.1 ± 0.7^a
Egg hatch from surviving females (%)	76.2 ± 2.8^a	73.5 ± 3.9^a	74.6 ± 5.8^a	72.2 ± 2.2^a

Means ± SD were calculated from three replicate experiments (N = 3), each using 60 lice, at four exposure times. Because there were no significant differences amongst exposure times (10, 30 min, 1 and 8 h), these data were combined.

Means in the same row or column followed by the same letter are not statistically different (ANOVA, P < 0.05).

No louse survived to adulthood after egg treatment with either NYDA formulation when exposed 30 min or more.