When using an oxalic vaporizer mites are killed and drop to the floor of the hive. It is suggested that a good treatment program would involve three applications spaced one week apart. A good idea of degree of infestation could be gained by doing a mite count on each of those applications with a fourth treatment at the end of the fourth week to determine the effectiveness of the previous three treatments. The mite count during the four successive treatments would give a good view of the condition of the hive, would it not? Mike in LA
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