Greg Peterson/Machinery Pete's Pick of the Week is green and made a Top 20 list plus he previews several auctions occurring on Sept. 9th and shares price trends information on the 2nd hand market. We check in with Alison Robertson, Iowa State University extension field crops pathologist about disease issues and what to look for.

<p>Greg Peterson/Machinery Pete's Pick of the Week is green and made a Top 20 list plus he previews several auctions occurring on Sept. 9th and shares price trends information on the 2nd hand market.&nbsp;We check in with Alison Robertson, Iowa State University extension field crops pathologist about disease issues and what to look for.</p>

A daily national conversation about the latest issues impacting agriculture and rural America.