QUIZ – Early weed control

Three quick and critical questions on early weed control – two on pre-seed burnoff, one on suspicious patches.

1. Here are four products that can be used in the pre-seed window on fields planned for canola: bromoxynil (Group 6), carfentrazone (Group 14), Tough (Group 6 pyridate) and Conquer II (Group 6 bromoxynil and Group 14 pyraflufen-ethyl). What do they have in common? 

They work best on small weeds, so coverage is crucial

They specialize in cleavers control

They are good choices for kochia and volunteer canola

They are especially good in fields with numerous larger weeds

2. Which of the following is the most obvious indicator that weeds could be resistant to herbicide?

A missed patch includes many species of weeds

The target weed is not on the label for the applied herbicide

Weeds are large and the low rate of herbicide did not kill them

The herbicide killed a large percentage of weeds from a species, except for an odd-shaped patch

3. A University of Saskatchewan study compared three pre-seed burnoff scenarios. Two treatments had similar yield. One treatment had lower yield. Which had the lower yield?

Early weed control with seeding the day after

Early weed control with late seeding

Late weed control with late seeding

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