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spots on leaves

Posted by mazelady tx (My Page) on
Fri, Sep 17, 10 at 17:35

I noticed a few white aphids on the underside of my tropical hibiscus leaves so I sprayed the leaves on both sides with organic pesticide. 3 or 4 days later the leaves had these spots on them. There aren't any aphids on them but I have found an ant or two crawling on the plant.
What is this? Could the aphids have a delayed effect? Maybe the organic pesticide? Help?

Here is a link that might be useful: Hibiscus leaf

Follow-Up Postings:

RE: spots on leaves

What was in the spray? Was is a soap of some kind?
The leaves appear to have been damaged by whatever you sprayed on them. From the photo it looks like the chemical puddled or dripped on to the leaf with greatest damage.
You don't need to use chemicals to control an aphid infestation, just hose them off the plant. An aphid hosed off it's plant very rarely can get back to it. Was the plant infested or did it only have a few aphids? Are you sure they were aphids? Live ones are rarely white.
Also, organic pesticides can be just as dangerous (or more) as inorganic and need to be handled with the same care.

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