Health Canada’s Pest Management Regulatory Agency (PMRA) initiated a special review of chlorothalonil (i.e. Bravo, Echo, etc.) in 2018. The entire consultation document can be found here [Proposed Special Review Decision PSRD2022-01 Special review of chlorothalonil and its associated end-use products - Canada.ca]. PMRA has come to the conclusion that chlorothalonil use poses a concern for human health and the environment. Health Canada is proposing continued registration of greenhouse ornamentals but all other uses of chlorothalonil are proposed for cancellation. If you wish to read the consultation documents and raise any concerns, you can do so at the PMRA publication section [https://www.canada.ca/en/health-canada/corporate/contact-us/pest-management-regulatory-agency-publications.html] by May 11th, 2022. Please consider making your voice heard. The Fruit and Vegetable Growers of Canada (formerly Canadian Horticulture Council) is also conducting a survey so that they can respond to PMRA’s proposed cancellation. You can find the surveys here:
·
Fruit and Vegetable
Survey: https://www.surveymonkey.com/r/NJ3WJHF
·
Potato Survey: https://www.surveymonkey.com/r/P98D3Q7
Responses will be accepted until April 15, 2022.
Chlorothalonil is one of the few Class M (multisite) fungicides
available in a number of crops. Without
it in a rotation, growers will be forced to rely on single site fungicides that
all pose a greater risk of pathogens developing resistance. For many diseases,
growers have other control options available to them, but with the loss of a
multisite fungicide, great attention needs to be paid to rotating FRAC
Groups. As always, you can find further
information on control options on Perennia’s commodity specific pages. Pest Management Guides are in the process of
being updated for the 2022 growing season and should be available in the coming
weeks. In the meantime, Management
Guides from 2021 are still available.
Brassicas:
In Brassicas, chlorothalonil has been used to control
Alternaria leaf spot and downy mildew in broccoli, brussels sprouts, cabbage,
and cauliflower. Other products are
available to use to control Alternaria such as Fontelis (7), Luna Privilege (7),
Inspire (3) and Quadris Top (11, 3). For
downy mildew in Brassicas, available products include Pristine WG (7, 11),
Zampro (40, 45), Quadris Top (11, 3) and Captan 50-WP (M4). Please check out
Perennia’s Broccoli, Brussel Sprout, Cabbage and Cauliflower page: https://www.perennia.ca/portfolio-items/brassica/?portfolioCats=122 for
PHI and REI details.
Carrots:
In carrots, Bravo has been historically used to manage leaf blights (Cercospora and Alternaria). Other control options include Quadris Top (11, 3), Cabrio EG (11), Fontelis (7), Luna Privilege (7) and Miravis Duo (7, 3) for Cercospora and Quadris Top (11, 3), Cabrio EG (11), Pristine EG (7, 11), and Fontelis (7) for Alternaria. Please check out Perennia’s Carrot page: https://www.perennia.ca/wp-content/uploads/2018/03/Guide-to-Pest-Management-in-Carrots-2021.pdf for PHI and REI details.
Celery:
In celery, Bravo has been historically used to manage leaf
blights (Cercospora and Alternaria). Other control options include Quadris Top (11, 3), Cabrio EG (11),
Fontelis (7), Luna Privilege (7) and Miravis Duo (7, 3) for Cercospora
and Quadris Top (11, 3), Cabrio EG (11), Pristine EG (7, 11), and Fontelis (7)
for Alternaria. Please check out Perennia’s Celery page: https://www.perennia.ca/wp-content/uploads/2018/03/Guide-to-Pest-Management-in-Celery-2021.pdf
for PHI and REI details.
Cucumbers:
Anthracnose, powdery mildew and scab in cucumber, controlled
by Cabrio EG (11), Pristine WG (7, 11), Proline 480SC (3), Inspire (3),
Fontelis (7), Vertisan (7), and Miravis Duo (7, 3) for Anthracnose, Cabrio EG
(11), Pristine WG (7, 11), Proline 480SC (3), Inspire (3), Fontelis (7),
Vertisan (7), Luna Privilege (7), and Quadris Top (11, 3) for powdery mildew,
and Pristine WG (7, 11), Inspire (3), Fontelis (7), Luna Privilege (7), and
Miravis Duo (7, 3), for scab. Please check out
Perennia’s Cucumber page: https://www.perennia.ca/wp-content/uploads/2018/03/Guide-to-Pest-Management-in-Carrots-2021.pdf
for PHI and REI details.
Onions:
With the loss of Bravo, botrytis leaf blight in onion has
other control options such as Scala SC (9), Fontelis (7), Luna Tranquility (7,
9), Quadris Top (11, 3), Sercadis (7), and Miravis Duo (7, 3). Please check out Perennia’s Onion page: https://www.perennia.ca/wp-content/uploads/2018/03/Guide-to-Pest-Management-in-Onion-2021.pdf
for PHI and REI details.
Parsnip:
Root canker in parsnip, unfortunately has no registered
fungicides that do not contain chlorothalonil. If you are struggling with this disease, please reach out to myself,
Dustin MacLean at (dustinmaclean@perennia.ca
or 902 324-9623.)
Potato:
Late blight, early blight, and botrytis vine rot in potato,
controlled by Dithane F-45 (M), Ridomil Gold MZ 68 WP (4, M), Quadris (11),
Headline EC (11) for late blight, Fontelis (7) and Ridomil Gold MZ 68 WP (4, M),
Quadris (11), Scala SC (9), Inspire (3), Luna Tranquility (7, 9) and Miravis
Duo (7, 3) for early blight, and Ridomil Gold 480SL (4) being the only
registered fungicide that does not contain chlorothalonil for control of
botrytis vine rot in potato. Please
check out Perennia’s Potato page: https://www.princeedwardisland.ca/sites/default/files/publications/potato_guide_2016.pdf
for PHI and REI details.
Tomato:
Early blight, late blight, Septoria leaf spot, anthracnose,
and botrytis gray mold in tomato, controlled by Cabrio EG (11), Inspire (3), Fontelis
(7), Vertisan (7), Luna Privilege (7), Luna Tranquility (7, 9), and Miravis Duo
(7, 3) for early blight, Acrobat 50WP (40) for late blight, Cabrio EG (11) and
Fontelis (7), and Cabrio EG (11) for Septoria leaf spot, Dynasty 100FS (11),
Inspire (3), Quadris Top (11, 3), Aprovia Top (3, 7) and Miravis Duo (7, 3) for
anthracnose, and Cyproflu (9, 12), Fontelis (7), and Luna Tranquility (7, 9)
for botrytis gray mold. Please check out Perennia’s Tomato page: https://www.perennia.ca/wp-content/uploads/2018/03/Tomato_2018.pdf
for PHI and REI details.
Perennia spray guides are updated annually and will be
posted on the Perennia commodity pages in the coming weeks. As always, this information is continuously
changing and therefore it can cease to be current and accurate. Pesticide
labels are the best source of information and should always be consulted prior
to using a product. The best source for the most up to date labels is the
Health Canada website: https://pr-rp.hc-sc.gc.ca/ls-re/index-eng.php
By: Dustin MacLean, Horticulturalist/Field Plant Pathologist
