Figure 4. Regrowth inhibition of cotton at 21 DAT under two temperature regimes for 48 hours with Dropp at 0.05 lb ai/A alone or plus ammonium sulfate (Am.S.), crop oil concentrate (COC), COC plus Am.S., or no Dropp. Bars with the same letter are not significantly different at the 5% level of probability according to Duncan's Multiple Range Test.