Varroxal 75g

Composition: Each gram of Varroxal contains 0.71 g of oxalic acid, equivalent to 1 g of oxalic acid dihydrate. It is presented as a white crystalline powder.

Indications: Varroxal is indicated for the treatment of varroosis (Varroa destructor) in honey bees (Apis mellifera) in brood-free colonies. Its use is recommended in autumn/winter when outdoor temperatures range between 2 °C and 10 °C.

Mode of Action: Oxalic acid acts as a contact poison on the Varroa destructor mite. The oxalic acid dihydrate solution spreads topically through physical contact between the bees, affecting the mite due to its low pH.

Application Methods:

1. Evaporation/Sublimation:

• Procedure: Place 2 g of the product in the crucible of the evaporator (e.g., Instantvap, Provap, or Varrox-Eddy) and position it through the hive entrance under the winter cluster.
• Temperature: Perform the treatment at temperatures between 2 °C and 10 °C.
• Recommendation: A second treatment after 2 weeks is advisable for colonies with high reinfestation (>6% infestation).

2. Drip Method:

• Preparation: Mix 8 scoops of the product with 200 ml of warm 1:1 sugar syrup to obtain a 4% oxalic acid dihydrate solution.
• Application: Use a syringe to apply 0.25 ml/dm² of solution per side of each comb. This solution is ideal for treating four colonies.
• Temperature: Suitable for outdoor temperatures above -15 °C.

3. Spraying:

• Preparation: Mix 6 scoops of the product with 200 ml of warm water in a manual sprayer to obtain a 3% oxalic acid dihydrate solution.
• Application: Spray 2-4 ml of the solution per side of each comb covered with bees. The maximum volume is 80 ml per hive.
• Temperature: Perform the treatment at outdoor temperatures above 8 °C.

Special Precautions:

• Safe Use: Use appropriate protection, including chemical-resistant gloves, safety goggles, and an FFP3 mask for evaporation or spraying applications.
• Environmental Recommendations: Apply the product outdoors or in well-ventilated areas and handle it with your back to the wind.

Withdrawal Period:

• Honey: Zero days. Do not use during honey flow.

ATCvet Code: QP53AG03

Pharmacodynamics and Pharmacokinetics:

• Action: Oxalic acid penetrates the exoskeleton of the bees and acts topically.
• Distribution: It is detected in adult bees 24 hours post-treatment, with a significant reduction by 11 days post-treatment.

Important Notice: We can only ship this medication to users registered with an address in Spain. We are authorized to sell medications only to beekeepers registered in Spain. If you live in another European country, we advise you to contact your veterinarian or the corresponding beekeeping health group in your region for advice and support on legal varroa control techniques.