Our Wheat Growers agronomists in the Wolsey and Huron areas have been reporting aphid populations in winter wheat this spring. Aphids can be damaging in wheat from direct feeding, but certain aphids can also vector the Barley Yellow Dwarf Virus (BYDV). BYDV and aphids are often “patchy”, with localized infestations across fields. Greenbugs and English grain aphids have been identified, but bird cherry oat aphids are also possible. Insecticide treatment may be needed with moderate to high numbers. Stripe rust is also present in many fields, so scouting for both pests is advised.