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May 13, 2020 9:34 PM CST
|I'm new to roses, planted a few bushes last year, and a couple trees this year. I'm having trouble with 4 out of 5 of them. Different types of leaf discoloration and I can't find identical photos on Google to figure out what's wrong. All 4 plants have a different type of issue.
I had a pretty nasty aphid infestation so I'm wondering if that had anything to do with it. Funny enough, the leaves are perfect in the plant that was hit hardest by aphids.
Can anyone give me some insight? Thank you!
1 and 4 were planted last year, 2 and 3 this year.
May 13, 2020 10:50 PM CST
|Since you stated you had a bad aphid infestation, all that damage looks like typical aphid damage.
That puckering on the leaves is typical of damage from insects with sucking mouth parts (vs. chewing mouth parts which would leaves holes in the leaves) namely aphids.
When you see severe aphid infestation try using a strong spray of water on them. They'll fall off the foliage and drown and can't crawl back up.
Unfortunately, the damaged foliage won't recover, but you could pick it off if you want and new foliage will grow, providing you keep an eye on any new aphids you see.
IF you're not averse to using chemicals you could use a systemic rose food which poisons the foliage and kills the aphids at the same time as well as feeding the plant.
May 14, 2020 7:20 AM CST
|Thanks for the reply. I did apply a systemic 3 in 1 last week and it looks like it's just now taking effect. I've been spraying/flicking aphids off daily and they're finally in reduced numbers. Yesterday most of them were already dead when I flicked them off.
A few people I know (not necessarily experts, that's why I came here) are telling me it's black spot on all four plants. They're saying I should removed all affected leaves and stems and spray with a fungicide or neem oil.
SW Ohio River Valley (Zone 6b)
May 14, 2020 12:48 PM CST
|You have more than aphids going on..... possibly anthracnose. For how long does this systemic last? If you're choosing to go this route at least choose one with the shortest half-life. You can dilute it to decrease it further so as not to concur with flowering. Doesn't the 3 in 1 include a fungicide?|
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