Herbicide Recommendations for Carrots: Preemergence followed by Postemergence

Pub 75: Guide to Weed Control > Vegetable Crops > Herbicide Recommendations for Carrots: Preemergence followed by Postemergence

Excerpt from 2008 Chapter 13, Publication 75, Guide to Weed Control, Order this publication

Precautions

PRE followed by POST - Use on muck soils ONLY.
For POST - Spray when crop has 2 or more fully developed leaves (8-15 cm tall).
Apply before annual grasses are 5 cm high & broadleaf weeds are 15 cm high.
Carrot leaves will become yellow or light green, but they will soon regain their normal colour.
Do NOT apply during hot, dry weather (>32ºC) or when crop is under stress.
Do NOT apply if heavy rains are expected.
Use the lower rates for smaller weeds.

**Lorox (PRE) followed by Lorox (POST)**
Trade Name	Lorox DF followed by...	Lorox DF	or Lorox L followed by...	Lorox L
Active Ingredient	linuron followed by...	linuron	or linuron followed by...	linuron
Formulation	50 DF	50 DF	480 g/L	480 g/L
Rate per hectare (active)	0.55 to 1.125 kg/ha	0.55 to 1.125 kg/ha	1.125 to 2.25 kg/ha	1.125 to 2.25 kg/ha
Rate per hectare (product)	1.1 to 2.25 kg/ha	2.25 to 4.5 kg/ha	1.1 to 2.25 L/ha	2.25 to 4.5 L/ha
Rate per acre (product)	0.44 to 0.9 kg/ac	0.9 to 1.8 kg/ac	0.44 to 0.9 L/ac	0.9 to 1.8 L/ac

Precautions

PRE followed by POST.
Do NOT apply the 2nd treatment closer than 2 weeks after the first treatment.
Do NOT apply more than 2 applications per season.
Spray POST when crop has 2 or more fully developed leaves (8-15 cm tall).
Apply POST before annual grasses are 5 cm high & before broadleaf weeds are 15 cm high.
Carrot leaves will become yellow or light green, but they soon recover.
Use nozzle pressure of 175-275 kPa. Do NOT exceed 275 kPa.
Do NOT apply with herbicidal oil.
Do NOT apply during hot, dry weather (>32ºC) or when crop is under stress.
Do NOT apply if heavy rains are expected.
Use the lower rates on sandy soils and for smaller weeds.
Do NOT use on coarse-textured soils low in organic matter.