GH said:

I am sorry to have posted in French. Here is what Google comes up with
on an image search for oeillets d'inde
http://images.google.com/images?q=oeillets+dinde&hl=en
my French is not so good for flowers and I was hoping someone would
identify it.

Most of the pictures seem to be /Tagetes patula/ which has the English
common name 'French Marigold. ' This flower is native to Mexico and
Guatamala, despite what the English and French names suggest.

/Tagetes/ are supposed to repel nematode worms but this is most
effectively done by planting them in masses and tilling them in the
year before the tomatoes are planted.

North Carolina Department of Agricultu

"The roots of these attractive flowering plants contain chemicals that
kill nematodes. As a method of biocontrol, growing marigolds is not
only pleasing to the eye but economically and environmentally sound
as well. One drawback, however, is that the benefits are not realized
until the following year. Also, the treatment frequently needs to be
repeated with marigolds and vegetables grown in alternate years."
http://www.ncagr.com/agronomi/nnote1.htm

Applying a mulch around the tomato plants will help prevent weeds and
disease.

Tomato plants are more likely to attract aphids if they are given too much
nitrogen fertilizer.

Kelp spray will help prevent diseases of the tomato leaves.
--
Pat in Plymouth MI ('someplace.net' is comcast)

Any technology distinguishable from magic is insufficiently advanced.
(attributed to Don Marti)