Evidently the two of us are talking about two completely different things.
Your photo was cropped to showcase the beetle and added to the Pest Control Library as an example of a Cucumber Beetle.
As we discussed in email, permission to do that is part of our terms of service. I think we are all in agreement that this is all legit.
Regarding the USDA- I have no knowledge of this at all, and have no prior knowledge of it, and have not seen a link on their site of your photo.
We do not work with the USDA, and are not in partnership with them. If they are using your photo without your permission, it has nothing to do with Garden.org.