monique at mail.bio.tamu.edu
Tue Aug 17 09:10:21 EST 1999
Look for scale insects. They can look like little brown
bumps--motionless and appearing legless. Ficus are especially prone to
infestation. Scale excrete honeydew just as aphids do. Ficus usually
do not ooze their white sap unless damaged.
David Hershey wrote:
> I have seen this same problem indoors on Ficus benjamina and a 7 foot
> tall potted grapefruit. I have not seen aphids or other pests so it does
> not seem to be an insect problem. It might be a physiological problem.
> It seems sap is oozing out of the leaf onto the upper leaf surface.
> Possibly it is coming through stomates or hydathodes? A wild guess is
> that when the tree isn't growing indoors in the winter, it still
> photosynthesizes and the excess photosynthates ooze out. Might be a good
> project for an plant anatomy class to study.
> On Ficus benjamina, I also notice a small accumulation of a white
> exudate on the underside of the leaf where the blade joins the petiole
> but it does not seem sticky. Another wild guess is might Ficus benjamina
> be an ant plant in its native habitat and the sugary sap be to feed ants
> and the white exudate be a food body?
> If you can give the plant a shower, you can wash the sticky sap off. I
> hose off the grapefruit tree in the spring when it is taken outdoors for
> the summer.
> David Hershey
> dh321 at excite.com
> Lee, Julia wrote:
> > We are pretty lost, and need help...HELP... HELLPP!
> > We have a ficus benjamina, when we first moved it into the office, lost good
> > number of leaves, finally got it to do nicely, leaves came back, but not it
> > exudes a sticky substance....and it "rains" onto other plants (around, close
> > to it), and fall onto an adjacent desk... we have inspectect it and do not
> > see any "buggies".... please HELP!!!! .... it it a beautiful 7 ft. tree....
> > THANKS!!!
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