Management of Vegetation by Alternative Practices in Fields and Roadsides

Table 12

Assessment of control of vegetation by alternative herbicides and a conventional herbicide applied to mowed or unmowed roadside plots (Roadside Experiment  2).

Herbicide	Application^†; a.i. L ha^−1	Management of vegetation and time after treatment
		Mowed^‡			Unmowed
		1 wk	3 wk	5 wk	1 wk	3 wk	5 wk
		Visual index^§
Clove oil	34	2.3	0.7	0	3.0	0.7	0
Pelargonic acid	13	6.3	3.3	1.3	8.3	4.7	1.3
Limonene	18	6.0	3.3	1.3	5.7	3.7	1.0
Clove oil and	34	1.7	0.3	0	1.7	2.3	1.0
limonene	18
Citric acid-	25	5.7	1.7	0.3	4.3	1.3	0.3
acetic acid	19
Glyphosate	2.8	8.3	9.8	10.0	7.3	10.0	10.0
None		0	0	0	0	0	0

^†a.i.: active ingredient.
^‡Mowed to 10 cm height above ground.
^§Visual rating index. See Table 3 for indexing scale.
LSD is 1.4 for comparing herbicides in columns and is 0.7 for comparing dates in rows under mowed or unmowed treatments.