The data for both species was adequately fitted
with a three-parameter exponential rise to a
maximum model with damage increasing rapidly
and leveling off around the 43 rate with the tank
mix or the 83 rate with paraquat alone (Figure 1).
Based on the fitted models, maximum injury ratings
were achieved at lower rates with the tank mix than
with the paraquat alone. Trends were similar for
both species, with tomato slightly more tolerant of
herbicide uptake at lower rates then pepper.
Complete shoot death following exposure to the
tank mix was observed at 23 the recommended
application rate with pepper, whereas it was not
observed until 83 the recommended application