Management of Vegetation by Alternative Practices in Fields and Roadsides

Table 10

Assessment of control of vegetation by alternative herbicides applied at two concentrations to mowed or unmowed plots in roadside research (Roadside Experiment  1).

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	1.3	0.7	0.3	2.3	1.7	1.0
	68	5.0	4.0	1.0	7.3	4.0	1.0
Pelargonic acid	13	6.3	5.0	0.7	7.7	5.0	1.3
	26	7.3	6.3	1.7	8.7	7.7	3.3
Limonene	18	5.0	3.3	1.0	3.7	4.3	1.0
	36	2.7	1.7	0.3	3.7	2.3	0.3
None		0	0	0	0	0	0
Mean			3.0 NS			3.3

^†a.i.: active ingredient.
^‡Mowed to 10 cm height above ground.
^§Visual rating index. See Table 3 for rating scale.
LSD is 1.1 for comparing herbicides in columns and is 0.3 for comparing dates in rows under mowed or unmowed treatments. NS: no significant difference between mowed and unmowed plots by -test.