How early in the spring does one desire to place the strips in the hives?
I would go with when you would regularly put treatments in. I aim to get them into all my hives through September. I am in Dunedin, which is in southern NZ so the bees are often a little slower to get going than most other parts of the country. I am coming up to 3 years of only using oxalic staples for varroa control and I am very pleased with the general well-being of my beehives.
John That sounds like an interesting experiment. I spoke to my state bee inspector one evening. I tried to explain what the staples were, etc. His reply was that they wouldn't work here, totally different environment in N.Z. bla bla bla. I built a whole career on doing what others said couldn't and wouldn't. I like to experiment as well. I'm just getting started in bees. This will be my 2nd year. I used the staples late summer , early autumn last year and my last alcohol wash showed zero mites.
I would disagree with your state inspector. I actually think New Zealand is an ideal place to trial and develop these sorts of treatments/products.
A couple of reasons that spring to mind:
Being where we are in the world means our seasons are not very distinct and very variable. This results in large differences from one beekeeping season to the next. Some seasons the bees have a decent break over winter while other years winters are almost non-existent and they barely have a break. This sort of variability means that a treatment needs to be robust to work reliably.
We also have many different beekeepers who keep bees in the same areas (this is the case for most of NZ). I doubt there are any places where these independent beekeepers properly work together with respect to a strategy for varroa control. There is always likely to be someone not doing what they need to and losing hives because of it, which results in invasion pressure for other beekeepers in the area. Again, for treatments to work reliably they really need to work well.
I am sure other beekeepers can add to this but I think that this adds up to NZ being a great place to test this sort of product because if it works here it is quite likely to work anywhere.