Survival of microsclerotia of Calonectria pseudonaviculata and C. henricotiae exposed to sanitizers

Abstract

Discrete microsclerotia of C. pseudonaviculata from culture were treated with eight commercially available sanitizers (ZeroTol 2.0, Oxidate, Sanidate, X3, Greenshield, and Lysol Concentrate at maximum label rates, plus 70% Ethanol and 0.6% sodium hypochlorite) to determine effective methods of disinfestation of nursery beds and benches. Ethanol proved most effective, killing microsclerotia in less than 5 min. ZeroTol, 10% bleach, and 70% ethanol were used in comparison tests of microsclerotia of C. pseudonaviculata and C. henricotiae. Microsclerotia of C. henricotiae were found to be more sensitive regardless of size. This finding, along with other research that has found differences in fungicide sensitivity and thermotolerance between the two species, suggests that differences between the species should be elucidated.