Table 4. Waterhemp and Palmer amaranth mortality and estimations of biomass reduction using a log-logistic model as influenced by downwind distances for each nozzle*herbicide combination tested in the spray particle drift studyab.
| Nozzlec | Distance | Waterhemp mortality (biomass reduction) |
Palmer amaranth mortality (biomass reduction) | ||||
|---|---|---|---|---|---|---|---|
| TP95015EVS | Glyphosate | 2,4-D | Dicamba | Glyphosate | 2,4-D | Dicamba | |
| m | _________________________________________ % ____________________________________ | ||||||
| 1.0 | 100 (89) | 83 (83) | 83 (74) | 100 (93) | 0 (75) | 67 (86) | |
| 1.5 | 83 (87) | 83 (75) | 50 (67) | 100 (93) | 0 (72) | 83 (83) | |
| 2.0 | 17 (85) | 0 (69) | 17 (62) | 100 (93) | 0 (69) | 17 (79) | |
| 2.5 | 17 (82) | 17 (63) | 0 (57) | 83 (92) | 0 (66) | 17 (77) | |
| 3.0 | 0 (78) | 0 (57) | 0 (53) | 83 (92) | 0 (64) | 0 (74) | |
| 4.0 | 17 (71) | 0 (49) | 0 (46) | 83 (91) | 0 (60) | 0 (69) | |
| 5.0 | 0 (63) | 0 (42) | 0 (40) | 67 (89) | 0 (56) | 0 (65) | |
| 7.0 | 0 (50) | 0 (32) | 0 (33) | 33 (83) | 0 (50) | 0 (58) | |
| 12.0 | 0 (27) | 0 (19) | 0 (22) | 0 (64) | 0 (41) | 0 (47) | |
| AI95015EVS | 1.0 | 100 (91) | 0 (60) | 17 (54) | 100 (94) | 0 (59) | 0 (59) |
| 1.5 | 67 (80) | 17 (53) | 0 (49) | 83 (91) | 0 (55) | 0 (56) | |
| 2.0 | 0 (67) | 0 (48) | 0 (45) | 100 (87) | 0 (53) | 0 (54) | |
| 2.5 | 0 (55) | 0 (44) | 0 (42) | 33 (83) | 0 (50) | 0 (52) | |
| 3.0 | 0 (44) | 0 (41) | 0 (39) | 33 (79) | 0 (49) | 0 (50) | |
| 4.0 | 0 (28) | 0 (35) | 0 (35) | 17 (71) | 0 (46) | 0 (48) | |
| 5.0 | 0 (19) | 0 (32) | 0 (33) | 0 (64) | 0 (44) | 0 (46) | |
| 7.0 | 0 (9) | 0 (26) | 0 (28) | 0 (52) | 0 (40) | 0 (43) | |
| 12.0 | 0 (3) | 0 (19) | 0 (22) | 0 (32) | 0 (35) | 0 (39) | |
aGlyphosate solution had the addition of ammonium sulfate solution at 5% v/v (Bronc®, Wilbur-Ellis Agribusiness, Aurora, CO, USA).
bBiomass reduction as compared to the untreated control.
cTeeJet Technologies, Spraying Systems Co., Glendale Heights, IL.