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A billboard popped up on I-69 West near I-75 this week that reads, "I'm Concerned About The Blueberries." Local blueberry growers, as well as members of the Michigan Blueberry Growers and the North American Blueberry Council have not been able to identify the sign's origin. (MLive.com Photo)

(Jake May | Mlive.com)

FLINT, MI – Have you seen it?

It’s a bright-blue billboard with white letters on I-69 West near the I-75 northbound off-ramp that reads: "I’m Concerned About The Blueberries."

There’s no company affiliation. There’s no indication of who commissioned the billboard. There’s no hint of what it's about.

RELATED: Click here to see six interesting theories about the billboard.

While Michigan is the nation’s No. 1 state in the production of high-bush blueberries – yielding more than 100 million pounds annually – no one has been able to explain the concern expressed on the billboard.

There were murmurs from people who noticed the billboard that maybe the folks at the Flint Farmers’ Market may have put the billboard there, but market Manager Dick Ramsdell put those rumors to bed.

“That certainly sounds interesting, but we don’t know anything about it. I haven’t seen it,” Ramsdell said.

“It’s not the way we would advertise anything, though.”

Cari Hunt, the office manager at Montrose Orchards – one of the largest blueberry crops in the county, and located in the city that hosts the annual Montrose Blueberry Festival – saw the sign and said she was as perplexed as anyone else.

Hunt said that her niece who works at the orchard pointed the sign out to her and she just had to go see it for herself.

“I have seen that and I don’t know what it is. Obviously, being at a blueberry farm, it caught my eye,” Hunt said.

“I’m really interested in finding out what it’s about, but I have no idea who’s responsible for it or why it’s there.”

The only indicator on the sign is a small CBS Outdoors logo on the bottom-center on the front of the billboard.

CBS Outdoors Flint-area office manager Adam Brozo was out of the office and did not return calls late Tuesday afternoon, Oct. 15.

Office assistants were unaware of the sign or its origin.

Also unaware of the sign were representatives from the Michigan Blueberry Growers at their Grand Junction-based office on the west side of the state.

Lori Merker, director of grower and industry relations at MBG, said that she didn’t know about the sign or what it meant.

She said that she doesn’t know of any reason to be concerned about the blueberries, especially in this region.

“We have no idea what it would be about and we’ve never heard of it. We had a good crop this year,” Merker said.

When asked if the sign might have been referring to spotted wing drosophila – a vinegar fruit fly that has been known to be harmful to both immature and ripe fruit – she said that it’s a fairly new pest that everyone in the industry is dealing with, but it hasn’t caused major problems with the crops yields.

What are your thoughts? Do you have any idea as to who put it there or why?

Let us know in the comment section below.