Walking a Fine Line with PGRs When farmers first started looking at variable rate applications of plant growth regulators, the idea was to vary the rates depending on the crop conditions they encountered as they went across the field. Some growers are doing that, but others are trying – or perhaps should be trying – a different approach: slowly increasing the amounts of PGRs from one application to the next to reflect stronger varieties, higher nitrogen levels, and environmental conditions.

Plant Growth Regulators Essential to Today’s Cotton Production With advances in plant breeding, cotton growers today have outstanding varieties with amazing yield potential. And growers are relying more and more on plant growth regulators (PGR) to help maximize each plant’s production through the season. And due to factors like increased seeding and nitrogen rates, Tyson Raper, University of Tennessee Extension Cotton Specialist, notes the need for very aggressive use of PGRs in recent years.