 Visit your FMC retailer or at astrio.ag.fmc.com to clean up this season. Follow 2WE for tar spot management in corn. Valid until 131.28. Always read and follow all label directions. We've been experimenting with foliar feeding crops for decades now. Here are two things that we've learned. First, one application of foliar fertilizer is not a substitute for a good soil fertility program. You simply can't get enough into the plant in one shot and have it last very long.