Leslie3200

Wow! Good timing on my part to find this a current thread. I just joined this group as I have been searching to find how to rid my elms of scale. One is a cork bark, probably, and the other was named after a woman? Hiller or something? Sorry, but it's all fading away from my memory banks as they have been planted in the ground for several years due to too many tragic losses after moving from zone 9 to zone 5. Last summer I noticed they had gross infestations of scale. I almost used Cygon but did a search and found that elms didn't like it. Now it's winter and I should either do a dormant spray or perhaps the Marathon (imicopriamid or something - it's the same stuff they use on dogs and cats to kill fleas, I believe).

I would really like to know exactly when I should treat them. The cork bark elm will be especially difficult to spray effectively, so I'd prefer the systemic. Should I wait until it starts leafing out, or let it get it's leaves well established first? Maybe right now? Any advice? What time of year did you use it Hector?

I'm zone 5 and they are currently under the snow, but it's been up to 50 degrees and before I know it, it will be spring!

Thanks
Leslie

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