Adapting the hull-scrape technique to current cultivars and near release peanut lines


University of Georgia

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Southeast (GA, FL, AL)

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To enhance the performance of the Hull-Scrape technique on new cultivars grown in the Southeast we conducted experiments during the 2015 and 2016 seasons. In 2016 the Hull-Scrape Board predicted the best digging date for 06G and TUFRunner 287 accurately. For Tifguard, GA 14N and TUFRunner 727 add another 7 days to the Hull Scrape prediction and dig on that date. For TifNV, GA 09B and 12Y add another 10 days to that prediction and dig on that date. Since the hull of GA 13M never seems to develop a dark black coloration we found it best to hull scrape that variety from 114 to 121 days after planting and then dig on that prediction. Of course, the predictions are made based on the assumption that the crop and its canopy is in excellent condition and the weather, equipment and labor also looks good. When disease was well controlled, the penalty for digging early was greater than the penalty for digging late. Some cultivars, like GA 12Y, GA 14N, TUFRunner 297 had less than a 5% penalty for being one week early or late. Other cultivars, like Tifguard the penalty for being one week early or late was around 15%. Growing degree days did not accurately predict the best harvest date.

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