Everglades Station Mimeo Rpt. 63-22
NEMATODE CONTROL FOR.CELERY
J. A. Winchester
The root knot nematode appeared to be the major nematod(
celery in a nematode survey conducted in 1962. Numerous soil
trained from celery seedbeds and celery fields, and, although
nematodes were found, they were not numerous enough to be of
A celery seedbed test was conducted in an area known to
nematodes. The treatments, rates, and yields from this test
e causing injury to
L samples were ob-
several other plant
have root knot
are given in the
Root knot Yield/
rating at' plot.
Treatment. Rate/acre Rate/bed transplant pounds
1. Methyl bromide 864# (under plastic) 24 lbs. 1.2 20.6
2. Chloropicrin 6" deep 72 gals. inject 2 gals. 2.3 13.3
3. Chloropicrin 3" deep 72 gals. inject 2 gals. 2.1 14-.0
4. Nemex 108 gals. inject 3 gals. 1.5 20.0
5. Vorlex 72 gals. inject 3 gals. 1.2 22.7
6. DD 72 gals. inject 2 gals. 25 17.2
7. Ethylene dibromide W-85 14.4 gals. inject 0.4 gals. 1.3 25.0
8. Vapam 108 gals. in drench 3 gals. 2.8 13.7
9. Check 2.9 17.0
Root knot rating 0 5 for none to severe galling respectively.
All treatments were applied on June 6-7, 1962 and celery variety 5270 was
seeded in the seedbeds on June 30. On October 4, at first pulling, 10 plants
from each plot were rated from 0-5 for root knot galling. Enough plants were
taken from each plot to plant a single field row plot, and these were harvested
on January 22, 1963. The yields and root knot ratings for these plants are
given in the above table.
Of the materials tested, Nemex, Vorlex, Ethylene dibromide and methyl
bromide treatments had the least root knot at transplanting and the highest
yields. All of the materials used in this test are cleared for celery seedbed
use, but only DD and Vorlex can be used for field treatment for celery.
Since these are the results of a single experiment, no recommendations are
made. Ethylene dibromide W-85 must be used with caution because it may be toxic
to celery at slightly higher rates than that used in the test.
Prepared for presentation at the Annual Vegetable Crops Field Day held at
the Everglades Experiment Station May 9, 1963.
Assistant Nematologist, Everglades Experiment Station, Belle Glade, Fla.
I,). Cr3 -3.
Root Dip Test
Since most celery seedbeds have areas where root knot is severe, a test was
made to control the nematodes present on the roots of celery transplants. The
nematocides used were Bayer 25141 and Cynem which are products of the Chemagro
Corp. and American Cyanamid Co. respectively. These were applied as root dips
at concentrations of 1-400, 1-800, and 1-1600 for 10, 30, and 60 minutes. The
plants treated in this test were planted in nematode free muck soil, and 90
days later their roots were rated for root knot galling.
Root knot rating
L/ Root knot gallings from 1-5 for none to severe galling.
In this test Cynem gave excellent control of
on the celery roots, while the Bayer compound was
and Bayer 25141 are both experimental nematocides
on celery at this time.
root knot nematodes in galls
much less effective. Cynem
and are not cleared for use
EES Mimeo Rpt. 63-22