How To Apply Mancozeb To Norway Maple Trees To Prevent Tar Spot On Leaves

I have some Manzate 200 wettable powder (80% mancozeb). Please advise solution mixing strength and if a sticking product (such as liquid dish soap) can used. Should the mixture be applied to the tree trunk or as a soil drench? What is the best time of the year to apply in the Mississauga, Ontario (zone 5) area? Any other useful information would be appreciated. Thank you.

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1 Comment To "How To Apply Mancozeb To Norway Maple Trees To Prevent Tar Spot On Leaves"

#1 Comment By GKH_Susan On 11/26/2021 @ 11:02 pm

The article below gives amounts to use, plus follow the instructions on the Manzate container. The Manzate instructions say to use a spreader-sticker if needed. You will spray it on the leaves beginning at bud break. See more below:

https://agsci.oregonstate.edu/sites/agscid7/files/horticulture/osu-nursery-greenhouse-and-christmas-trees/onn100110.pdf ^[1]
http://hyg.ipm.illinois.edu/pastpest/200220c.html ^[2]
https://www.gardeningknowhow.com/ornamental/trees/maple/maple-tar-spot-disease.htm ^[3]

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URL to article: https://questions.gardeningknowhow.com/how-to-apply-mancozeb-to-norway-maple-trees-to-prevent-tar-spot-on-leaves/

URLs in this post:

[1] https://agsci.oregonstate.edu/sites/agscid7/files/horticulture/osu-nursery-greenhouse-and-christmas-trees/onn100110.pdf: https://agsci.oregonstate.edu/sites/agscid7/files/horticulture/osu-nursery-greenhouse-and-christmas-trees/onn100110.pdf

[2] http://hyg.ipm.illinois.edu/pastpest/200220c.html: http://hyg.ipm.illinois.edu/pastpest/200220c.html

[3] https://www.gardeningknowhow.com/ornamental/trees/maple/maple-tar-spot-disease.htm: https://www.gardeningknowhow.com/ornamental/trees/maple/maple-tar-spot-disease.htm

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