My rose bushes are suffering from what I'm pretty sure are Rose and Pear Slugs (Sawflies). See photo. They just started to attack my roses this past week. They appeared last year & really beat up the roses all summer. I'm concerned they'll kill the bushes this year. Is there an effective organic treatment? I was thinking of Neem Oil but was told it doesn't work on Sawflies. Thanks!
Hi, I'm not experienced with sawflies, but have you tried to strengthen your roses? You can bury old rusty nails (or other iron bits) near the main root, and add powdered blood near the base of the plant. That seems to keep my roses happy for the most part. My main struggles with them are aphids, and black spot.Both are horrible in my area. I haven't got a great solution for either of those, but a water hose at full blast for the aphids, and neem and pruning for the black spot. Good luck, and if I can find any other advice other than just to strengthen the plant from within, I will certainly share with you.
Thanks, I haven't even fertilized the roses this year. I should add we've had endless snow & then rain since February of this year so I haven't been watering, let alone blasting the roses with water.
Please don't use neem when the roses (or any other plant) is flowering. Neem might be 'organic' and very safe for humans but the active ingredient azadirachtin it is apparently really bad for bees. So like all pesticides it is important to use it in an appropriate manner.
If you must spray it, cut off all the flowers or cover it well. Long term adding some nutrients to the rose and adding plants that attract beneficial insects should help.
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