Wheat School: Should you spray for rust?

by

Both stripe rust and leaf rust have been identified in the Ontario wheat crop. Will it affect your crop? What steps should you take to keep your crop safe from these leaf diseases?

In this episode of RealAgriculture Wheat School, resident agronomist Peter Johnson explains that stripe rust should be a concern for all growers while leaf rust is more of an isolated challenge that should only concern a few.

Last week, leaf rust was confirmed in a wheat field in Bruce County, Ontario. “We had a ton of leaf rust in the crop last year, but this is a case of us having the right conditions for it to overwinter,” says Johnson. “We should spray that field but it doesn’t put a huge spore load into the environment.” He adds that all growers should scout for leaf rust, and spray should they find it, “but it’s not a big deal for everybody.”

Johnson is more concerned about the potential impact of stripe rust, which had a tremendous impact on the 2016 Ontario crop. He notes that stripe rust blows in from south of the border so “the chances your wheat crop got exposed to stripe rust are really, really high.”

Do you need to spray a fungicide for stripe rust? That all depends on the variety, says Johnson. He recommends all growers go to www.gocereals.ca and check out the stripe rust tolerance rating for their variety.

He advises growers to keep a close eye on Venture and 25R46 – two of the hardest hit varieties last year. “If you have those in the field, you need to scout close and if you see even one pustule of leaf rust, you need to go out immediately and put on a fungicide.”

If growers see stripe rust in varieties with intermediate tolerance – a 4 rating – a fungicide is also required. “But if you have a variety with a 1 rating for stripe rust I think the genetic tolerace is good enough that the fungicide is not critical at this time,” adds Johnson. “You have to scout, but you may be able to wait and only have to spray your fusarium fungicide.”

Related: Wheat School: Identifying and Managing Stripe Rust

Click here for more Wheat School episodes.

Other Episodes

Wheat School (view all)Season 8 (2017) Episode 20
Episodes:

Please register to read and comment.

Privacy Preference Center

Necessary

Necessary cookies help make a website usable by enabling basic functions like page navigation and access to secure areas of the website. The website cannot function properly without these cookies.

gdpr, __cfduid, PHPSESSID, wordpress_test_cookie, woocommerce_items_in_cart, woocommerce_cart_hash, wp_woocommerce_session, wordpress_logged_in, wordpress_sec, wp-settings, wp-settings-time, __cf_mob_redir, wordpress_cache, realag
__cfduid

Marketing

Measuring interactions with the ads on the domain.

__gads,fsk_ut_2317
IDE

Statistics

These are used to track user interaction and detect potential problems. These help us improve our services by providing analytical data on how users use this site.

_ga,_gid,_gat,_cb,_chartbeat2,_chartbeat4
_ga,_gid
metrics_token

Preferences

Preference cookies enable the website to remember information that changes the way the website behaves or looks, like your preferred language or the region that you are in.

chartdefaults, comment_author, comment_author_email, comment_author_url
JSESSIONID, _os_session,anonymous_votes,csrf-param,csrf-token,user,user-id,user-platform,intercom-session,intercom-lou,intercom-session
personalization_id, tfw_exp

 

Register for a RealAgriculture account to manage your Shortcut menu instead of the default.

Register