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New Zealand Beekeeping Forums
NZ Beginner Beekeepers
Oxalic Strips - what do do once soaked?
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<blockquote data-quote="NatureAlley" data-source="post: 5317" data-attributes="member: 91"><p>As a follower of Otto's wisdom I use 60/40 Gly/OxAc. But my 'forwhatitsworth' gut feeling says 50/50 might be more or less equally suited. I assume that it is the powdery oxalic acid surface of the strips that determines the efficiency of the treatment. With relative humidities of anywhere between 50-80% in a hive the strips take up so much water because of the hygroscopic nature of glycerine that they drip for a few days. The second thing that happens is that, because OxAc is way more soluble in glycerine than in water (about 4-5x) the solubility of the OxAc decreases in the Gly/water mixture and a powdery deposit is formed on the strip surface. In other words the strips contain now a supersaturated solution where part of the OxAc has become solid. From the physics of this process it doesn't seem to matter much whether one uses 60/40 or 50/50.... but hey, I am retired now, who knows what my knowledge is still worth anymore... <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="NatureAlley, post: 5317, member: 91"] As a follower of Otto's wisdom I use 60/40 Gly/OxAc. But my 'forwhatitsworth' gut feeling says 50/50 might be more or less equally suited. I assume that it is the powdery oxalic acid surface of the strips that determines the efficiency of the treatment. With relative humidities of anywhere between 50-80% in a hive the strips take up so much water because of the hygroscopic nature of glycerine that they drip for a few days. The second thing that happens is that, because OxAc is way more soluble in glycerine than in water (about 4-5x) the solubility of the OxAc decreases in the Gly/water mixture and a powdery deposit is formed on the strip surface. In other words the strips contain now a supersaturated solution where part of the OxAc has become solid. From the physics of this process it doesn't seem to matter much whether one uses 60/40 or 50/50.... but hey, I am retired now, who knows what my knowledge is still worth anymore... :) [/QUOTE]
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Oxalic Strips - what do do once soaked?
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