Put some fungicide on soybeans this morning, that are in a field that is prone to have white mold problems.  I noticed towards the end of my spraying that many of the leaves were upside down.... probably due to heat starting to set it. 

It got me wondering if there's a reduction in benefit to spraying when the leaves are upside down.  Do soybeans take in as much to their underside, as they do the top of their leaves?  Just curious if there's a difference.

(Hope you don't think this a stupid question.)

thanks, gordon