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Eugene, OR

Hey all,

Quick question regarding PM prevention and Compass. As far as I know I didn't have any PM last year, on the tops or undersides of the leaves, despite not using a fungicide but I would like to ensure it doesn't bite me in the butt this year.

How long does Compass protect against PM? Is the "translaminar" movement good enough to not require an under leaf application? Is it gentle on the leaves? I'm a chicken when it comes to applying anything to the leaves as I'm afraid of burning them and ending my season early.

Any advice would be greatly appreciated.

7/25/2005 9:09:52 PM

Topsfield, Ma.

I've applied Compass twice so far this season, on top and bottom of leaves as best possible. No bad effects. Used leftovers on an old Lilac that already had PM, and I'm amazed at the good results. Also mixed some Neptunes Seaweed with it. Hope this helps. Duff

7/26/2005 9:36:06 PM

Ctpumpkin@optonline.net

Compass is considered a fairly mild strobilurin & plant injury is rare. Indeed it is also very safe for the user having earned the title "reduced risk pesticide" by the EPA.

Translaminar movement is mostly just a gassing off of the material. It does re-collect on nearby leaves but every effort should still be made to make a thorough application wherever possible.

Like any other fungicide, Compass will last only as long as the environmental conditions & pathogen pressure will allow. Maybe as short as 7 days to as long as 21. But keep in mind that younger plants might still be growing. Longer residual is more likely to be realized on vines that have been terminated.

7/26/2005 10:22:27 PM

Appalachian Mtns.

Brian....use a fogger or atomizer sprayer to get the underside of the leaves with the easiest and most thorough effect, and less work on you. OR, if you use a Solo sprayer, they make a double head attachment that allows for independent, 360 degree movement/rotation of each head and will allow the spraying of the undersides of the leaves to be SOOOOO much simpler and less time consuming.

7/27/2005 6:24:10 AM

Eugene, OR

Thank you for all the replies. It's just amazing that no matter what question I have, I can always count on this site for the answers!

Wish I could afford a fogger but I hardly spray as it is so I guess the money can be better spent on other silly things like the power bill LOL. I have a sprayer but it's no Solo. I'll just try my best to get even coverage on the tops and bottoms of the leaves. Thanks again everyone.

7/27/2005 1:17:51 PM