They're monitoring the stems, leaves ... grape growers' crops. Phillip Lujan, plant pathologist and assistant professor at New Mexico State University, calls powdery mildew and downy mildew ...

Loveday-based grape grower Jim Giahgias said prolonged rainfall at this time of year after a hot and humid week was perfect for downy mildew disease to form on the leaves of his 100-hectare vineyard.