I have been getting some reports from my extension colleagues in southeastern Pa about aphids in Timothy and from Delaware about aphids in small grains. Though, I have not seen any aphid problems in field crops in our area. It is a good idea to scout wheat fields to look for possible aphid populations moving from the plants to grain heads. Scouting information and control recommendations for aphids are available in the Mid-Atlantic Field Crop Pest Management Recommendation Guide.
Bill Bamka