Newbie gardener here, trying to figure out what is eating these spots into my leaves. I say "spots" because they aren't all holes. Many of them are spots in the leaves that have gotten tissue paper thin. A few weeks ago I say these tiny, oblong, lime green bugs on the under sides of the leaves. I haven't seen them in a few weeks though. Anyone have any ideas? Thank you!!
My 14 mature Knockout shrubs around our porch got attacked by sawfly larvae several weeks ago. By the time I realized it was a problem and got a systemic drench down, they had practically defoliated several of the bushes. Now I'm in a watch-and-wait pattern to see if I need to do a severe pruning, or if they'll re-leaf out.
Sevin can be used, but it's toxic to bees, so don't spray it on the flowers.
Bayer makes a 3-in-1 drench that feeds and protects against fungus, pest and other diseases. I'd recommend finding it and following the label for application. I was planning to apply a bag of Beaty'sMagic Mills Mix rose food when mine got attacked, so my local landscape supply recommended a different systemic insecticide/fungicide to pour around the base of the plants (applying another fertilizer wouldn't have been warranted.)
Ok, the day after spraying, one rose's leaves turned brown and were beginning to curl. Now, a week later, it has 4 leaves left and they don't look so hot. I have not done any more spraying, but I am afraid I might have killed the poor guy. He is still blooming though. :(
Mine almost completely defoliated before the systemic drench and fertilizer kicked in. Now they are putting on a flush of new leaves and a few blooms. Water and time. The Japanese beetles have arrived - I need to take a bucket of soapy water out today to the perennial borders. Uck.