Tracking the march of leek moth in Ontario

Leek moth (Acrolepiopsis assectella) is an invasive pest of European and Asian origin. The first North American detection occurred near the National Capitol Region (Ottawa) in 1993.  Since then, the leek moth has spread Continue reading Tracking the march of leek moth in Ontario

Spray Coverage in Carrot Potato and Onion

Jason Deveau, Application Technology Specialist – OMAFRA;
Dennis Van Dyk, Vegetable Crop Specialist – OMAFRA

In recent years, Syngenta has been promoting the Defy 3D nozzle in the UK, which is a 100° flat fan, designed to run alternating 38° forward or backward along the boom. They prescribe a boom height of 50 to 75 cm, 30-40 psi, and travel speeds of 10 to 14 km/h in cereals and vegetables. Compared to a conventional flat fan, they claim that the angle and medium-coarse droplets promise less drift and improved coverage.

In 2017, Hypro and John Deere began distributing the Defy 3D in North America. Our goal was to explore coverage from the 3D in vegetable crops. We compared the nozzle’s performance to common grower practices in onion, potato and carrot in the Holland Marsh area of Ontario.

Marsh

Continue reading Spray Coverage in Carrot Potato and Onion

Nozzle choice in vegetable crops – an Australian perspective

Here is a great article on sprayers101.com about spray nozzle selection in vegetable crops.

During my many years of work in the Australian vegetable and horticultural industry, I am continually asked:

What is the best spray unit to use?

My answer is quite simple:

The one that has been correctly set up and matched to the crop you are spraying.

That can be hard to achieve, especially in vegetable crops where the target can vary enormously from bare ground to upright leaf crops (e.g. onions), to horizontal leaf crops (e.g. potato and brassica).

Generally, I have found that air-assist booms offer the best starting point for achieving good spray coverage of vegetable crops. However, like any spray boom, they must be set up correctly. Air-assist booms are more expensive and require a few more horses to operate, which is why most Australian vegetable growers prefer to make do with a non air-assist boom.

So, if air-assist isn’t an option, it then becomes imperative to determine the most suitable nozzles for their particular requirements. I have worked in many vegetable crops over the years. I’ve held my share of “fluorescent dye nights” and checked spray coverage and canopy penetration with many grower groups. Based on my experience, there are three types of nozzles I recommend for most vegetable crops:

Read more here:

http://sprayers101.com/nozzle-choice-in-vegetable-crops-an-australian-perspective/

 

Corn Earworm and Late Planted Sweet Corn

Corn earworm pressure often increases as we head into September. With turbulent weather patterns originating in the Gulf of Mexico, flights of airborne moths are generally quite high.  As the tradewinds mix with the cooler air of the great lakes, these high populations are dropped into Southern Ontario.  Any sweet corn at the green silk stage is highly susceptible to corn earworm infestation.

For earworm control, cover green silks with an insecticide such as Coragen or Voliam Express.  Avoid insecticides from the pyrethroid family.  Corn earworm are known to be resistant to the pyrethroids.  Lannate TNG is a good rotational partner for Coragen and Voliam Express.

Heliothis trap for corn earworm monitoring

Muck Crops Research Station Grower Field Day

If you are a carrot or onion grower, or just interested in the latest vegetable research you are invited to the University of Guelph Muck Crops Grower Field Day on Thursday, September 7.  See the announcement below:

Grower Field Day Variety Trials 2017 invitation

The carrot and onion variety trials will be on display with entries from the major vegetable seed suppliers.

You can also view the onion research trials on topics like Stemphylium leaf blight, downy mildew and onion maggot. Research trials on carrot weevil control, carrot weed control and celery leaf curl will be featured and it’s also great opportunity to interact with University of Guelph researchers, other growers and industry reps.

The Muck Crops Research Station is at 1125 Woodchoppers Lane, King ON, L7B 0E9 with Stokes Seeds providing coffee and donuts and a free lunch compliments of Solar Seeds.

Information for commercial vegetable production in Ontario