We received the following email as a forward from Andy Hulting, OSU Extension. The original email was a description of black tip in Goetze winter wheat by Mike Flowers of OSU Extension.
Over the last week or so I have been hearing from multiple sources about black tip (or point) and sprout damage being reported in Goetze. These reports appear to be isolated to Goetze. There also seems to be a lot of confusion about why this is happening.
Black tip is a fungus that is found on mature grain. This typically occurs when mature grain stays moist for prolonged periods. Thus, black tip is typically found in irrigated and lodged fields that dry out slowly. Given the cool morning temperatures that do not allow the dew that formed overnight to dry quickly it is not surprising that black tip is being found this year. Why only (or mostly) on Goetze. Goetze is an early maturing variety (about 2-3 weeks earlier than Tubbs 06 and Madsen) and thus can have a longer exposure period to these conditions. Stripe rust on the head may have also dried down the grain quicker than expected and thus lengthened the exposure period. In any case, black tip is not normally a major concern.
Sprout on the other hand is major concern. Given the weather conditions it was very surprising to hear some of the high levels of sprout being reported. It appears from further grain testing that these high levels of sprout may be false positives. The black tip found on the grain is making it difficult for grain graders to properly determine if sprout is present. It is important to note that when grain is delivered it is examined visually for sprout damage and not through a falling numbers test, which would be more definitive. Therefore growers who are delivering grain and receive a high sprout level should ask for a re-examination by the Federal Grain Inspection Service (FGIS). Growers will be charged for this re-examination (~$12 per sample) but sprout levels have been reduced or eliminated when re-examined. This can have major economic implications for growers when dockage due to sprout is reduced or eliminated.
Please pass this information along to any who might be interested.