[JakeH]

Hey there,

I was notified by my local Ag department to move my bees away from an apple orchard that is going to spray.

I'm wondering if anyone knows how long I really need to wait until I can bring the bees back to the location? "or might know where I can find that info"

The pesticide being used is ASANA by Dupont I believe: http://www2.dupont.com/Production_Agriculture/en_US/assets/downloads/pdfs/K-15140.pdf

Any help is appreciated thank you!

 

[enjambres]

Here is a table from UMass Small Fruit program that lists common fruit pesticides and re-entry intervals and bee toxicity data.

Scroll down soomewhat to get to second chart which deals specifically with bee toxicity issues, organized by pesticide name.

It looks like Asana has two concentrations (high and low) the high concentration has a longer interval of danger for bees, but it is noted that it also has a HIGH TOXICITY for them if sprayed during bloom.

Link here: http://extension.umass.edu/fruitadvisor/ne-small-fruit-management-guide/toxicity-information-pesticides

Keep in mind, too, the issue of tank mixes, i.e. the addition of other pesticides (primarily fungicides) and wetting or sticking agents which may have a synergistic bad effect on your bees.

Hope that helps - good luck!

Enj.

 

[JakeH]

Wow that's a great help enjambres! Thank you so much for this. I had been looking but was spinning my wheels.

We'll see how it goes!

 

[TWall]

Trying to figure what the risks from a pesticide are can be confusing. Just doing and internet search can bring up lots of stuff you don't want. What I do is search for the product's LD50, lethal dose for 50% of population. That will give to information you want.

Here is the info for Asana: http://pmep.cce.cornell.edu/profiles/extoxnet/dienochlor-glyphosate/esfenvalerate-ext.html

If you scroll down to Effects on Other Organisms you will see info about bees. It is highly toxic but, also tends to repel bees. So, the bees that get exposed will die before making back to the hive, so the hive won't be contaminated. But, some bees will be repeled before being exposed.

I would do what I need to do to keep my bees from being exposed if at all possible.

Tom