I would say dribble OA only in late summer when bees can clean each other fast enough.
35grams oxalic acid x 1000grams warm water (1liter) x 1000grams sugar (1kg)
Dribble with a syringe 35ml on a normal and up to 50ml on a strong hive.
Dont kip leftover solution for the next treatment always use fresh mixture. When mixing OA and sugar it starts a chemical reaction and after a while (week or so depends on temperatures) the liquid is POISON to bees.
With acid in their stomach bees have a much shorter live, thats why I never dribble OA on winter bees. IMO its too cold now for the liquid acid.
35grams oxalic acid x 1000grams warm water (1liter) x 1000grams sugar (1kg)
Dribble with a syringe 35ml on a normal and up to 50ml on a strong hive.
Dont kip leftover solution for the next treatment always use fresh mixture. When mixing OA and sugar it starts a chemical reaction and after a while (week or so depends on temperatures) the liquid is POISON to bees.
With acid in their stomach bees have a much shorter live, thats why I never dribble OA on winter bees. IMO its too cold now for the liquid acid.
