How can I make an area of an image less brown?

[cheyrn]

I've been learning about curves, hue/saturation adjustment black/white adjustment, camera raw, etc. But, mostly things are based on identifying colors. How can one target a brownish area?
I have an image that is 3d models. The ground is mostly greenish, but there is an area appears brownish because of light. How can I adjust that area?
In the image, the area under the bee's left wings appear blurred to me, because of a brownish tint. I would like to deemphasize that.

[Nancy OShea]

The vignette effect (dark edges) would need to be counterbalanced with an equal and opposite light value.

There are many ways to do this.

You could start with a Curves Adjustment Layer to boost overall highlights.  And then selectively remove highlights with a layer mask and round soft brush set at 40% opacity value. 

In this example, painting with white brush conceals the adjustment layer below and black reveals it.

[Jumpenjax]

You can try using the dodge tool.

[cheyrn]

Thanks. Or, burn tool I guess.
I started removing the bee and flower and using stamp tool and smudge. I might try that again with burn tool.

[Chuck Uebele]

Sometimes with areas that are off, particularly with faces that have areas that are off color, I use color range. I zoom into the pixel level, set the eyedropper to sample a single pixel, then select a range of pixels that are way off. Then I use curves to correct the color. 

[cheyrn]

Thanks. That looks prommising!