I have a very large Staghorn ( about 100 fronds /5 ft diameter), and recently found scale. It has lost about 15 fronds but I have gone over every frond and scrapped off the scale with finger nail, But , a week later I see more young scale ; I am thinking of applying oil with a cloth rather than spray . ( About 5ml /liter of water) . Any alternatives?

  • Wouldn't mind seeing photos of the big Staghorn. – Rhizoqueer May 27 '17 at 4:21
  • How is your staghorn doing?? Any pictures?? – TheGrumpyTurtle Aug 1 '17 at 23:13
  • It is doing very well . Removing scale with fingernail worked fine . it just took a week. New growth is coming out now. I am trying to figure out pictures. – blacksmith37 Aug 3 '17 at 14:33
  • I got a photo to Facebook , still working on it . – blacksmith37 Aug 3 '17 at 19:15

This article Scale Insects on Staghorn Ferns might be useful. You've done the right thing so far by chipping them off with a fingernail, but these ferns are pretty sensitive to treatment for scale.The recommendation is to use horticultural oil or insecticidal soap as a spray, but it's important that you do not allow any sunlight to reach the plant after its been treated for some days, because this will increase the risk of damage from the treatment you've used.

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