All posts by Dennis Van Dyk

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/

 

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.

Matador/Warrior/Silencer and Imidan proposed phase out

The PMRA have proposed to cancel the registration of both lambda-cyhalothrin (Matador/Silencer/Warrior) and phosmet (Imidan). The decisions can be found here:

Lambda-cyhalothrin
Phosmet

The decisions state that lambda-cyhalothrin poses an unacceptable risk from dietary exposure (worst case scenario cumulative food residues would be too high), while phosmet poses a risk during application and post-application activities. The proposed precautions such as revised restricted entry intervals would not be agronomically feasible (e.g. 12 day REI for scouting carrots, 43 days for moving irrigation pipe).

Public consultation is now open until September 23 (lambda-cyhalothrin) or September 30 (phosmet) so if growers wish to make comments on these proposed decisions you can submit them to pmra.publications@hc-sc.gc.ca, or talk to your growers’ association who can comment on your behalf.

 

University of Guelph Potato Research Field Day

The UofG along with the Ontario Potato Board will be hosting the Potato Research Field Day on Wednesday August 16th at the Elora Research Station.

Come on out to view over 100 processing and table varieties where you can see the dug potatoes and foliage side by side. You can also hear about low glycemic impact potatoes from Dr. Reena Pinhero and an update on the CHC potato research cluster from Mary Kay Sonier of the PEI Potato Board. A free lunch will also be provided.

The flyer can be found HERE with more details, start time and directions.