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Posted by westy1941 z5 NO IL ( on
Mon, May 10, 10 at 21:54

Is it too late to apply Merit? I had a major iris borer problem last summer so I dug them all up - all 400+ - and was advised to apply 'Merit' in the spring. I killed every last freakin' one of the suckers (while I threw up) - I'm in Illinois - is it too late to use Merit? I never want to see another borer.


Follow-Up Postings:

RE: Merit

Please see the attached link. It recommends applying before having 2-70 degree days.

This is my second year of applying. I did it last year and didn't lose any to borers.

Here is a link that might be useful: MERIT to prevent borers

RE: Merit

Thank you so much!!! I don't know where you are, but we in Chicagoland have had an historically warm April and now in May it has been cool - even nearly freezing two nights ago. I am going to apply it anyway - can't hurt. And of course as this great info advises, check the leaves and crush them before they get to the rhizome - if it's not too late. Thanks again - appreciate all that information you attached.


RE: Merit

I'm in RI. We've had pretty much the same weather as you. Freeze and frost warnings the previous 2 nights! ARGH!!!

Thankfully I'm within the city limits so we only got into the low 40's both nights but it sure has kept the iris buds from opening.

RE: Merit

Just out of curiosity, where can you buy Merit at in a small quantity? Thanks

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