Re: CULT: Terimycin
- To: Multiple recipients of list <i*@rt66.com>
- Subject: Re: CULT: Terimycin
- From: b*@tiger.hsc.edu (Bill Shear)
- Date: Fri, 28 Mar 1997 10:09:03 -0700 (MST)
Bacterial leaf spot tends to produce clear spots on the leaves that get
larger and larger, eventually flow together and destroy the leaf. It is
often self-limiting, disappearing when the weather dries out.
Fungal leaf spots have a yellowish center surrounded by a brown zone. They
usually stay relatively small and only in heavy infestations run together.
Fungal leaf spot is probably the much more common sort. Spores overwinter
on old leaves, so perhaps also in small leaf bits that become a part of the
soil. It can appear very early in the year and persist and spread.
Terramycin would be of no use against fungal leaf spot; it is a general
agricultural antibiotic. I suspect that it would work on bacterial leaf
spot only if you repeatedly sprayed it. I would have some questions about
its effect on beneficial soil bacteria, particularly if it was used
regularly. Antibiotic resistance of disease-causing organisms would be
another potential problem.
Bill Shear
Department of Biology
Hampden-Sydney College
Hampden-Sydney VA 23943
(804)223-6172
FAX (804)223-6374
email<bills@tiger.hsc.edu>
