OK - the following answers my questions (from the label): thanks, Jim.
Use only in late fall or early spring when little or no brood is present.
Oxalic Acid Dihydrate might damage bee brood.
Oxalic Acid Dihydrate will not control Varroa mites in capped brood.
Do not use when honey supers are in place to prevent contamination of marketable honey.
Apply only when monitoring indicates treatment is required. Consult state guidelines and local extension experts for monitoring protocols and thresholds for treatment.
RESISTANCE MANAGEMENT:
Oxalic acid?s mechanism of action is unknown at this time. Any Varroa mite
population has the potential to become resistant to acaricides. Resistance development is affected by both the frequency
of application and rate/dose of application. Continued reliance on a single class of miticide or single miticide with the same
mode of action will select for resistant individuals which may dominate the mite population in subsequent generations. In
order to prevent resistance development and to maintain the usefulness of individual insecticides it is important to adopt
appropriate resistant management strategies.
To delay resistance:
x
When possible, rotate the use of miticides to reduce selection pressure as compared to repeatedly using the
same product, mode or action or chemical class. If multiple applications are required, use a different mode of
action each time before returning to a previously-used one.
x
Base miticide use on Integrated Pest Management (IPM). This includes proper pest identification, monitoring for
locality specific economic threshold and economic injury levels, record keeping, and utilizing all available control
practices (cultural, biological and chemical).
x
Maximize efficacy by following all label instructions including dosage and timing of application.
