![]() ![]() However, the greatest harm is caused by Varroa spreading virus diseases, such as deformed wing virus. Worker bees parasitized in this way as pupae have reduced lifespan. Varroa mites harm colonies directly, through the harm they do to pupal worker bees in sealed cells where the female mites lay their eggs, and where the mother mite and her offspring feed on the blood of the pupa. Varroa was first detected in the USA in 1987 and is now found throughout North America. ![]() One of the most serious is Varroa, the mite Varroa destructor, which originates from East Asia and is now found in all continents except Australia. Pests and diseases are a challenge to all beekeepers. Application of 2.25g oxalic acid via sublimation to broodless hives in Winter killed 97% of the Varroa. Spraying significantly reduced colony survival. ![]() Sublimation is effective at lower doses, causes no harm to the bees, and results in colonies with more brood in Spring. LASI research shows that of the three application methods used by beekeepers (trickling, spraying, sublimation) to control Varroa with oxalic acid, sublimation is the best in all respects. Ratnieks, Luciano Scandian, Hasan Al Toufailia The Best Way To Kill Varroa With Oxalic Acid by Frances L.W. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |