App hits the tar spot
Tar spot, a disease of corn plants caused by the fungus Phyllachora maydis, has been causing problems in Mexico since the 1910s, but it stayed out of northern climes for more than…
Tar spot, a disease of corn plants caused by the fungus Phyllachora maydis, has been causing problems in Mexico since the 1910s, but it stayed out of northern climes for more than…