The beautiful, dry sunny weather with high winds this past week and weekend has allowed many of you to make great strides with planting. Unfortunately this also exposed young small grain seedlings to same conditions.
Seedlings with the yellow, constricted
appearance symptomatic for heat
canker (photo courtesy of Byron Fisher)
If the hot and dry weather last for several days, its is possible to see repeated bands, much like a barcode. The damage is nicely depicted on page 81 of the second edition of the Small Grains Field Guide. Because of the high winds, the tips of leaves may fall over or even break off at the yellow band and give a field a very ragged appearance.
Damage from heat canker is temporary and should not affect further growth and development.