Management of forage insect pests is aimed primarily at the alfalfa weevil and the potato leafhopper in alfalfa.
The first arrivals of adult Potato Leafhoppers (PLH) will have made it into PA in June from their wintering areas in the Southeastern United States.
The potato leafhopper (PLH) is the number one pest affecting alfalfa. This tiny (1/8 inch) wedge shaped, pale yellowish-green, winged insect can significantly affect alfalfa yields and forage quality.
If you were a Cereal Rust Mite, the most widespread source of decreased timothy forage yields in south central Pennsylvania, you would be pretty darn happy right about the time you are reading this article.
Researchers note that alfalfa weevils have a long egg laying and hatching period.