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Recorded contributions to citrus breeding, introduction, and history.
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World of CitrusWorld of CitrusRecorded contributions to citrus breeding, introduction, and history.
5 credits across 5 varieties · Greg McCollum
Collaborated in evaluation of fruit quality during field testing of US-1281 Citrandarin.
The USDA Agricultural Research Service released US-1281 to nurserymen and growers in September 2014; the release document identifies it as selection BS95-V5-10. Kim D. Bowman planned and conducted selection, evaluation, and field testing, and Greg McCollum collaborated on fruit-quality evaluation from field trials. Reported performance concerns Hamlin scions in Florida flatwoods and ridge trials; the release cautions that flatwoods superiority was not clear at the ridge site.
United States
Collaborated in evaluation of fruit quality during field testing of US-1282 Citrandarin.
USDA-ARS released US-1282 to nurserymen and growers. The agency document credits Kim D. Bowman with planning and conducting field testing and Greg McCollum with fruit-quality evaluation. In a St. Lucie flatwoods Hamlin-scion trial, seven trees per rootstock yielded 63 kg/tree on US-1282 and 19 kg/tree on Swingle in 2013; the release describes relative tolerance under HLB pressure, not resistance. Bowman & McCollum (2015) dates the USDA release to September 2014.
United States
Collaborated in evaluation of fruit quality during field testing of US-1283 Citrandarin.
USDA-ARS released US-1283 in September 2014 for commercial use in areas threatened by HLB. Kim D. Bowman planned and conducted selection, evaluation, and field testing with industry partners; Greg McCollum collaborated in evaluating fruit quality from field trials. The release reports Hamlin sweet-orange scion trials at Florida flatwoods and ridge sites, with results qualified by site. These are grafted scion results, not fruit measurements of US-1283 itself.
United States
Collaborated in evaluation of fruit quality during field testing of US-1284 Citrandarin.
The USDA Agricultural Research Service released US-1284 Citrandarin to nurserymen and growers for commercial use in Florida to address the need for rootstocks with improved HLB tolerance. The official release identifies Kim D. Bowman as field-testing lead and Greg McCollum as collaborator in fruit-quality evaluation. In the St. Lucie flatwoods trial, Hamlin on US-1284 yielded 63 kg/tree in 2013 after Las infection and improved nutrition; the Water Conserv II ridge trial showed no consistent yield advantage over Swingle across reported years, with a significant difference only in 2009. These are site-specific grafted-scion results, not fruit traits of US-1284.
United States
Planned and conducted USDA field testing of US-942.
US-942 was field-tested at several locations and with several scions. The USDA release notice says field testing was planned and conducted by Don Hutchison, Heinz Wutscher, Greg McCollum and Kim Bowman, and identifies the field selection as HRS-942 or US-942.
Florida, United States
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