Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Larval survival after inoculation with Amberlite XAD16 extracts (3.5 mg/ml) from different strains of P. larvae. Strains are compared to each other and to control groups by mean time of death (MST) estimated with the Kaplan-Meier test. Statistically different MSTs are indicated by different letters; treatments sharing the same letter do not differ. P < 0.01 by log-rank test and Mantel-Cox test. m = original amount of extract (g), n = number of honeybee larvae, N = number of plates used.
