Daylilies forum: Mancozeb fungicide

Views: 285, Replies: 9 » Jump to the end
Name: Maurice
Grey County, Ontario (Zone 4b)
Image
admmad
Aug 23, 2018 5:44 AM CST
Has anyone who uses Mancozeb had all the new daylily leaves become yellow or whitish instead of green, as seen in this photo? If so did the plants recover?
Thumb of 2018-08-23/admmad/fefebb

Maurice
Name: Mike
Hazel Crest, IL (Zone 5b)
There's a place of quiet rest !
Image
Hazelcrestmikeb
Aug 23, 2018 9:41 AM CST
Never heard of this until now Admmad. Interesting to hear what anyone has to say.
robinseeds.com
"Life as short as it is, is amazing isn't it ?" Michael Burton
"Be your best you".
Name: Maurice
Grey County, Ontario (Zone 4b)
Image
admmad
Aug 23, 2018 12:16 PM CST
@Hazelcrestmikeb
Do you use Mancozeb?
Maurice
Name: Judy
Louisiana (Zone 9b)
Region: Louisiana Daylilies Tropicals Region: Gulf Coast Hybridizer Seller of Garden Stuff
Image
judydu2
Aug 24, 2018 5:30 AM CST
I've used Mancozeb with Zinc as my contact fungicide for several years. I've never had it harm or cause discoloration to any daylily parts. It does need agitation to keep the solids in suspension, so I have to keep shaking my 2-gallon sprayer as I go along.
Name: Maurice
Grey County, Ontario (Zone 4b)
Image
admmad
Aug 24, 2018 7:01 AM CST
@judydu2
It does need agitation to keep the solids in suspension, so I have to keep shaking my 2-gallon sprayer as I go along.

I assume that would mean that if the sprayer is not agitated the plants that were sprayed when the sprayer was near empty would receive a much higher dose than recommended? Or does the sprayer clog and stop spraying effectively? Or both?


Maurice
Name: Larry
Enterprise, Al. 36330 (Zone 8b)
Composter Garden Photography Million Pollinator Garden Challenge Garden Ideas: Master Level Plant Identifier Celebrating Gardening: 2015
Region: Alabama
Image
Seedfork
Aug 24, 2018 8:03 AM CST
I have used immunox, it never seemed to do much good. Also, I did not like it because it left a slight white film on the foliage.
The foliage itself never seemed to have been bothered by it.
Name: Frank Mosher
Nova Scotia, Canada (Zone 6a)
Lover of wildlife (Raccoon badge) Birds Roses Clematis Lilies Peonies
Region: Canadian Photo Contest Winner: 2017 Million Pollinator Garden Challenge
Image
fwmosher
Aug 24, 2018 8:34 AM CST
The following was just released by Pest Control Canada, Government Agency, June 2018 and is a re-evaluation of Mancozeb:

"An evaluation of available scientific information found that foliar application of mancozeb to potatoes meets current standards for the protection of human health and the environment when used according to the conditions of registration which include required amendments to label directions...... All other uses of mancozeb are being cancelled due to unacceptable risks to human health and will be removed from the labels."
My personal note: This is a very harmful, read toxic fungicide! Even in using Mancozeb on potato plants, in our Canadian Province of PEI, Prince Edward Island, (large potato grower) every year over the past five years, there are (HUGE) fish kills because of the runoff into their rivers and streams! Every Year! When some fungicide runoff causes thousands of fish to float to the surface, belly up, that is a bad chemical! There are several, very safe fungicides available. California has Mancozeb listed as a Carcinogenic, with other very critical health warnings and issues as well. Without getting political, in the US now, your EPA has been stripped of almost all regulatory authority. Scary.
Name: Barbie
Northwest Florida (Zone 8b)
Garden Art Daylilies Dog Lover Cat Lover Region: Florida Amaryllis
Irises Vegetable Grower Keeps Horses
Image
QHBarbie
Aug 25, 2018 3:50 PM CST
I use Mancozeb on my daylilies and tall bearded irises with no problems. It's the only thing that controls root rot in the irises here.
Name: Mike
Hazel Crest, IL (Zone 5b)
There's a place of quiet rest !
Image
Hazelcrestmikeb
Aug 27, 2018 10:18 AM CST
Admmad I have never used it.
robinseeds.com
"Life as short as it is, is amazing isn't it ?" Michael Burton
"Be your best you".
Name: Judy
Louisiana (Zone 9b)
Region: Louisiana Daylilies Tropicals Region: Gulf Coast Hybridizer Seller of Garden Stuff
Image
judydu2
Aug 31, 2018 8:14 PM CST
admmad said:@judydu2
I assume that would mean that if the sprayer is not agitated the plants that were sprayed when the sprayer was near empty would receive a much higher dose than recommended? Or does the sprayer clog and stop spraying effectively? Or both?




I don't know the answers to your questions. I do know it has never clogged my sprayer, and mine is just a small, hand-held 2-gallon tank. I don't know which of the solids may be inert (if any) or which may be active. All I can say is that in my garden, Mancozeb has not harmed my daylilies whether spraying from a full tank or near empty. I spray just after the dew has evaporated and before the sun gets brutal, or on cloudy days.

« Garden.org Homepage
« Back to the top
« Forums List
« Daylilies forum
You must first create a username and login before you can reply to this thread.

Member Login:

Username:

Password:

[ Join now ]

Today's site banner is by dirtdorphins and is called "Agastache"