Plant progress regulators (PGRs) are a wonderful instrument for controlling the height of a wheat crop, they usually additionally impression stem energy, particularly for a crop beneath excessive administration.
“Lodging is caused by high nitrogen rates, or excessive nitrogen, and also high seeding rates,” says Mike Holzworth, analysis agronomist with C&M Seeds.
On this Wheat College episode, resident RealAg agronomist Peter “Wheat Pete” Johnson has a chat with Holzworth, about some trials that C&M Seeds has performed this yr, PGR use of their winter wheat varieties.
The trials embody using two completely different PGRs, three completely different varieties, three completely different seeding charges, and 4 completely different nitrogen charges, the best of which being 220 lbs/ac.
Johnson notes that crops aren’t at all times shortened by a well-timed PGR software, however within the excessive seeding fee and excessive nitrogen fee plot, handled with PGR, the distinction between the handled plot and the untreated plot is noticeable.
Within the video, Holzworth and Johnson level out the resistance to wind that the handled plot has, story continues under.
C&M Seeds additionally performed round with the timing of PGR software for the trials, noting that the shortening impact continues to be there, however the impression to the plant is increased up.
“We applied it a little later, we had about eight days of cool weather, and I just wanted to be a little bit safe. It was applied at growth stage 39, so a little bit later than the recommended time,” says Holzworth. “The later you apply it the higher up it’s going to shrink.”
Making use of a PGR later within the recreation nonetheless works, however isn’t fairly on the desired spot within the plant — the higher internodes of the plant are shortened, as a substitute of the decrease internodes, which occurs when the PGR is utilized at progress stage 30 to 31.
Holzworth has additionally seen detrimental results of PGRs on sure winter wheat varieties, so it’s a good suggestion to speak along with your seed supplier about which varieties excel with a PGR software.