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Copyright 2005, Board of Trustees, University
SUniversity of-Florida Library
'7 Institute of Food and Agricultural Scierces
OCT 23 19
CENTRAL FLORIDA RESEARCH AND EDUCATION CENTER
Sanford, Florida Univers;ty o
Research Report SAN 87-03 Novee--
CUCUMBER NEMATICIDE TRIAL
H. L. Rhoades
Cucumber is an important fresh market vegetable crop in Florida
with a reported value of $37.4 million produced on 16,100 harvested
acres during the 1984-85 crop year. It is produced primarily on fine
sand type soils where it is attacked by several plant nematode species.
Particularly important are the sting nematodes, Belonolaimus
o longicaudatus, and the root-knot nematodes, Meloidogvne spp.
The nematicide trial was conducted in the fall of 1985 at the
Central Florida Research and Education Center, Sanford, FL, on Myakka
fine sand infested with B. longicaudatus, M. incognita, and the lance
nematode, Hoplolaimus galeatus. The experiment was designed to compare
the efficacy of soil fumigants with nonfumigant organophosphorus and
carbamate nematicides. The experimental design was a randomized
complete block with five replicates. Plot size was 5 feet (1 row) X 38
feet. The nematicides involved in the test were:
1. Telone II (dichloropropene), Dow Chemical Co.
2. Busan 1020 (metam-sodium), Buckman Laboratories, Inc.
1. Mocap (ethoprop), Rhone-Poulenc, Inc.
2. Nemacur (fenamiphos), MOBAY Chemical Corp.
3. Furadan (carbofuran), FMC Corp.
4. Counter (terbufos), American Cyanamid Co.
5. Vydate (oxamyl), E.I. DuPont de Nemours & Co., Inc.
6. Standak (aldoxycarb), Union Carbide Co., Inc.
On 6 September, 6-inch ridges were prepared with disk-hillers for
all plots. On 13 September, approximately 2 inches of the bed tops were
removed with a leveling board before application of the soil fumigant
treatments. The soil fumigants were applied with a hand injector with
Telone injected as a single line of injections spaced 10 inches apart
and 6 inches deep and Busan 1020 in a double line of injections spaced
10 inches apart and 6 inches deep. On 24 September, the tops of the
remaining beds were leveled in the same manner with a leveling board and
the nonfumigants applied. Mocap, Nemacur, Furadan, and Counter were
applied as granules in 15-inch bands and incorporated 2 inches deep with
rotary cultivator tines. Liquid formulations of Vydate and Standak were
added to water and sprayed in 15-inch bands, then incorporated in the
same manner as the granules. 'Poinsett' cucumbers were seeded on the
same day. Cultural practices were normal for the area and the cucumbers
were harvested six times during 12 November 3 December. Soil samples
were collected on 2 December for determining populations of the
ectoparasitic nematodes, and on 5 December, eight plants were dug from
each plot and the roots indexed for root-knot nematode galling.
The results are presented in Table 1. All nematicides but Busan
1020 significantly reduced sting nematode populations, but only the soil
fumigants, effectively reduced lance nematode populations. All but
Busan, Furadan, and Counter reduced root-knot galling. All treatments
significantly increased yield indicating that early control had been
provided by all of the nematicides which allowed for plant establishment
and increased yield.
Table 1. Effect of nematicides
on nematode populations and yield of
Stinga Lance a Root-kngt Yield
Treatment Rate/A nemas nemas index (Ib/plot)
Check --- 37 203 4.91 46
Telone II 3 gal 3 10 1.85 107
Busan 1020 10 38 61 3.93 90
20 26 48 4.73 80
Mocap 2 lb 9 151 2.71 103
a 3 4 211 2.03 103
Nemacur 2 13 160 2.28 98
3 6 116 2.15 117
Furadan 2 n 5 120 4.95 92
Counter 2 n 11 104 4.45 97
Vydate 2 9 166 3.70 91
Standak 2 7 215 2.86 105
LSD 0.05 16 80 0.73 25
aAverage number of nematodes extracted from 100 cc of soil.
bBased on a root galling index of 1, no galling, to 5, severe galling.