Which mite is commonly found on small grains?

Oligonychus pratensis, commonly known as the pasture mite or small grain mite, is notably associated with small grain crops such as wheat and barley. This mite affects plant health by feeding on leaf tissue, leading to discoloration and reduced vigor in the plants. Accurate identification of this mite is essential for effective pest management in small grain agriculture, as it can severely impact crop yield and quality.

The other mites and pests listed do not primarily affect small grains. For instance, Penthaleus major, known as the false spider mite, typically targets other plant types, focusing on broadleaf weeds rather than grains. Petrobia latens, often referred to as the brown wheat mite, does have some association with wheat but is not the most prevalent or recognized mite in small grain contexts. Empoasca fabae, known as the potato leafhopper, is more commonly associated with other crops like alfalfa and beans. Therefore, the association of Oligonychus pratensis with small grains uniquely identifies it as the most relevant mite for this context.