Proceedings of the Sixty-first Annual Meeting of the Northeastern ...

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Japanese knotweed control 28 DAT and biomass reductions 28 DAT and 218 DAT/ 30 DAE. 2005-2006. 1, 2
Japanese knotweed control 1 Japanese knotweed dry weights 1
Herbicide treatment Rate 28 DAT 28 DAT 30 DAE
-kg ai/ha- -%- -kg/plot- -kg/plot-
Triclopyr 0.56
+ carfentrazone-ethyl 6 0.093 88.0a 0.116e 0.262b
Triclopyr 0.28
+ carfentrazone-ethyl 6 0.093 90.7a 0.120de 0.348b
Triclopyr 0.56
+ carfentrazone 0.093
+ mesotrione 6 0.106 80.7ab 0.181bcd 0.307b
F-4113 5.8 73.7abc 0.137cde 0.00c
Carfentrazone-ethyl 0.22
+ glyphosate 1 5.68 69.0abc 0.162cde 0.00c
Triclopyr 1 0.56 71.3abc 0.189bc 0.269b
Triclopyr 0.56
+ mesotrione 6 0.106 70.7abc 0.172bcde 0.246b
Glyphosate 3.1 51.3bcd 0.192bc 0.00c
Triclopyr 0.28
+ mesotrione 6 0.106 43.3cde 0.261a 0.2530b
Glyphosate 3.65 35.0de 0.188bc 0.00c
Glyphosate 1.85 20.0ef 0.195bc 0.00c
Untreated Control --- 0.0f 0.235ab 0.636a
LSD0.05 --- 30.7 0.06527 0.2279
1 Abbreviations: DAT, days after treatment, DAE, days after emergence (07 MAY 2006)
2 Means followed by the same letter are not significantly different according to Duncan’s multiple range test at the 0.05 level of significance
3 Japanese knotweed control was estimated visually 7, 14, 21, and 28 DAT.
4 Japanese knotweed biomass, taken as three 1meter
2 sub-samples per plot, were collected 28 DAT and 218 DAT/ 30 DAE. Biomass dry weights
were representative of percent reduction when compared to the control.
5 Treatments included a non-ionic surfactant at 2.5% v/v
6 Treatments included crop oil concentrate at 1% v/v
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