Registration of ‘HoCP 04‐838’ Sugarcane

Abstract

HoCP 04-838' (Reg. No. CV-181, PI 687221) sugarcane (interspeciic hybrids of Saccharum spp.) was selected and evaluated by scientists at the USDA-ARS, working cooperatively with the Louisiana State University Agricultural Center, and the American Sugarcane League, Inc., from a cross between the female parent 'HoCP 85-845' and the male parent 'LCP 85-384'. It was released to growers in Louisiana in May 2011. Yields from three crops (plant, irst ratoon, and second ratoon) at 12 farm locations compared well with HoCP 96-540, the most widely grown cultivar in Louisiana during that time. The plant-cane sucrose yield (Mg ha −1 ) of HoCP 04-838 was equivalent to HoCP 96-540, and cane yield was signiicantly higher than HoCP 96-540. HoCP 04-838 is earlier maturing than HoCP 96-540 but not as early as 'HoCP 00-950', the high sucrose standard cultivar. Mature stalk cold tolerance was similar to LCP 85-384, the cold tolerance standard. HoCP 04-838 is resistant to smut, mosaic caused by Sorghum mosaic virus, brown rust, and ratoon stunt. HoCP 04-838 is moderately resistant to leaf scald and is susceptible to Sugarcane yellow leaf virus. It is resistant to sugarcane borer. HoCP 04-838's high yield potential and cold tolerance make it a useful addition to existing commercial sugarcane cultivars in Louisiana.

Registration of ‘HoCP 09‐804’ Sugarcane

“…In the plant‐cane through second‐ratoon crops, HoCP 09‐804 was not significantly different than ‘L 01‐299’ (Gravois et al, 2011), the current leading cultivar in all traits (Table 2). Although the fiber content of HoCP 09‐804 was numerically higher than the other commercial cultivars, it was only significantly higher than ‘L 03‐371’ (Gravois et al, 2012) in all crops and ‘L 99‐226’ (Bischoff et al, 2009) in plant cane, ‘HoCP 96‐540’ (Tew et al, 2005) in the first ratoon, and all cultivars except ‘HoCP 04‐838’ (Todd et al, 2018) in the third ratoon.…”

Registration of ‘L 11‐183’ sugarcane

“…In 2018, Louisiana experienced freezing temperatures on 1 January (−5.0˚C) and 17 January (−7.9˚C) that lasted for longer than 24 h. Sucrose content decreased significantly for every cultivar and, on average, decreased by 40% across all cultivars between the 3-31 January sampling dates (Table 7). The least amount of decrease in sucrose content was recorded by HoCP 04-838, the freeze tolerance check (Todd et al, 2018), and the largest decrease in sucrose content was exhibited by 'TucCP 77-042' (Mariotti et al, 1991), whereas the response for L 11-183 fell in the middle. Similarly, the least amount of change in pH and titratable acidity (g/L) (basic to acidic) was recorded in HoCP 04-838, while L 11-183 was either among the highest for change in pH or around the middle for change in titratable acidity (data not shown).…”

“…Consequently, 4 yr of plant cane, 3 yr of first ratoon, 2 yr of second ratoon, and 1 yr of third ratoon crop data were available from the outfield testing stage (Table 3). L 11-183 produced significantly more sugar yield in the plant cane, first, second, and third ratoon crops than HoCP 96-540 but significantly less sucrose yield than L 01-299 and several commercial cultivars in the second (L 01-299 and 'HoCP 09-804' [Todd et al, 2019]) and third (L 01-299, HoCP 09-804, and 'HoCP 04-838' [Todd et al, 2018]) ratoon crops. L 11-183 yielded significantly more cane yield than L 01-299 in the plant cane but significantly less than L 01-299 in the remaining crops.…”

Sugarcane cultivar response to glyphosate and trinexapac-ethyl ripeners in Louisiana

“…The experimental design was a split-plot factorial arrangement of ripener treatments and cultivars with four replications. Whole-plots were ripener treatment with three levels and subplots were nine sugarcane cultivars HoCP 96–540 [9], L 99–226 [10], HoCP 00–950 [11], L 01–283 [12], L 01–299 [13], HoCP 04–838 [14], Ho 07–613, Ho 09–804 [15], and HoCP 09–840 that were randomly allocated to subplots within each whole plot. Glyphosate (Roundup WeatherMax, Monsanto, St. Louis, MO) and trinexapac-ethyl (Moddus, Syngenta Crop Protection, Greensboro, NC) were applied at a rate of 210 g ae ha -1 and 200 g ai ha -1 , respectively.…”