I would ask if they would ever, or have ever researched biological controls.

I think that the best PR move they could make would be to research possible biological control methods for insects, diseases or weeds.  It would make null and void most of the arguments against big corporations and their supposed stranglehold monopoly on ag inputs.  Not even saying that they would have to succeed in creating or marketing anything, but at least show that they are putting in the effort, the publicity alone would be worth the investment.  And if they should succeed, it may not make them many $, but I think it would gain them a lot of loyalty and get the public on their side too.  It could also extend the length of time that their current products are viable before resistance is a problem.