QUIZ – Weed control challenges

Growers face challenges to timely weed control. Here are three questions to help get the most from weed control sprays when days are grey or windy, or when fields have lots of target weeds.

1. If days are too windy, night can (sometimes) provide a reprieve. A Farming Smarter study compared three time-of-day options for herbicide application – daytime (noon-2:00pm), night (midnight-1:00am) and dawn (4:00-5:00am). Daytime spraying showed the best results. What was second best?

Night (midnight-1:00am)

Dawn (4:00-5:00am)

2. Temperature affects herbicide efficacy. Which scenario is best for herbicide efficacy?

Cloudy days with highs of 10°C after a night near 0°C

Sunny days with highs of 15°C after a night of 3°C

Sunny days with highs of 20°C to 25°C after a night of 10°C

3. Liberty 150 SN (glufosinate) herbicide can be applied to Liberty Link canola from cotyledon to early bolting stages of the crop. When you tank mix Liberty with Centurion (clethodim), the crop stage stays the same. When you add Facet L (quinclorac), which can be included in a three-way tank mix with Liberty and Centurion, what is the window of application based on crop stage? 

Cotyledon to 2-leaf stage

Cotyledon to 6-leaf stage

2-leaf to 6-leaf stage

2-leaf to early bolting

 Loading...

 

We have two Canola Canola Fundamentals articles to support this week’s quiz:

• Spraying tips for tough conditions
• Weed control strategies for each HT system