Tag Archives: herbicide injury

Herbicide injury symptoms in tomatoes

Darren Robinson, University of Guelph, Ridgetown Campus; Janice LeBoeuf, OMAFRA, Ridgetown


Herbicides are useful tools for the management of weeds.  The herbicides registered for use in tomatoes are selective in their activity, injuring or killing weeds while being safe to use on the crop. Crop injury may occur, generally when a crop is stressed beyond its ability to adequately deal with a herbicide application.  Injury due to herbicides can arise as a result of several factors, including weather-related stress, soil factors such as light soil texture and low soil organic matter, shallow planting and sensitive crop varieties.  The pages in this section contain information on herbicide injury for several products registered on tomatoes in Canada. Continue reading Herbicide injury symptoms in tomatoes

Spraying Dicamba in Canada

This is one to review and share! A very educational slide show from Jason at Sprayers101.com

There’s been unprecedented demand for information regarding the safe and effective application of the new dicmaba products registered in Canada in late 2016. In response, every extension agent, agrichemical rep and researcher with any know-how on the subject has spent the last year (or more) speaking at grower meetings. I, for one, am fairly certain…

via Spraying Dicamba in Canada — Sprayers 101

How sensitive is your crop to dicamba and 2,4-D?

Are soybeans or tomatoes more sensitive to dicamba? Are sweet potatoes or watermelon more likely to be hurt by 2,4-D? Could crops show visual injury at 1/800th of the rate of one of these products?

In a recent article in Southeast Farm Press, Dr. Stanley Culpepper, University of Georgia Extension weed specialist, shared his data on crop sensitivity (visual injury) to dicamba and 2,4-D. Note that most of this data is from trials in Georgia (and some of the crops on the list reflect that). Continue reading How sensitive is your crop to dicamba and 2,4-D?

Seasonal Topics – June 6, 2016

Tomato injury from PinnacleJune 6, 2016 — Some topics are relevant year after year, but you might not always take the time to filter through previous posts to find them. I’ve highlighted some here that might be of interest this week. Click on the preview images below to jump to the articles. Continue reading Seasonal Topics – June 6, 2016

Pesticide drift – You can’t say you didn’t know

From sprayers101.com. By Jason Deveau, OMAFRA.

sprayers101When it comes to information about pesticide drift, it’s easy to find and there’s a lot of it. I have an archive of 29 articles written by the Ontario Ministry of Agriculture staff spanning 1999 to 2014. There’s so much, in fact, that it sometimes feels like there’s nothing left to say that hasn’t already been said. Here are four common themes – see if you recognize any:

  • The Carrot: This theme outlines the benefits to not drifting, like better neighbourly relations, reduced environmental impact and saving money in wasted pesticide.
  • The Stick: Insurance adjusters or regulators give stats or case studies warning of the wasted time and the financial, legal, and insurance impacts of drift.
  • The Heart: Those impacted by drift vent their frustration and emotional and financial impact, or those accused talk about the conflict, irritation and personal insult of being accused.
  • The Facts: Technical specialists lay out math, methods and models of how to keep spray where it belongs with talk of wind-speed, nozzles and pressure. Continue reading Pesticide drift – You can’t say you didn’t know

Annual rye-grass and clover sensitivity to soil applied corn herbicides

Annual rye-grass and clover sensitivity to soil applied corn herbicidesVegetable growers using cover crops in rotation with corn will be interested in a new article on the tolerance of cover crops to various soil applied corn herbicides. The article, by Dr. Darren Robinson (University of Guelph, Ridgetown Campus) and Mike Cowbrough (OMAFRA), is found on fieldcropnews.com.