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Group Title: Cucumber nematicide trial.
Title: Cucumber nematicide trial. 1985
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Permanent Link: http://ufdc.ufl.edu/UF00075808/00002
 Material Information
Title: Cucumber nematicide trial. 1985
Series Title: Cucumber nematicide trial.
Translated Title: Research Report - University of Florida Central Florida Research and Education Center ( English )
Physical Description: Serial
Language: English
Creator: Rhoades, H. L.
Publisher: Central Florida Research and Education Center, University of Florida
Publication Date: 1985
 Record Information
Bibliographic ID: UF00075808
Volume ID: VID00002
Source Institution: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: oclc - 144607735

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HISTORIC NOTE


The publications in this collection do
not reflect current scientific knowledge
or recommendations. These texts
represent the historic publishing
record of the Institute for Food and
Agricultural Sciences and should be
used only to trace the historic work of
the Institute and its staff. Current IFAS
research may be found on the
Electronic Data Information Source
(EDIS)

site maintained by the Florida
Cooperative Extension Service.






Copyright 2005, Board of Trustees, University
of Florida







(t- University of Florida

CENTRAL FLORIDA RESEARCH AND EDUCATION CENTER

Sanford, Flor HUME LIBRARY
Research Report SAN 86-03 iugust 1985

CUCUMBER NEMATICID TRI LS i

H. L. Rhoade .F.A,S.- Univ. of Florida

Cucumber is an important vegetable crop in Florida with a reported value of
$34 million produced on 15,100 harvested acres in 1983-84. It is produced pri-
marily on fine sand type soils where it is attacked by several plant nematode
species. Particularly important are the sting nematode, Belonolaimus
longicaudatus, and the root-knot nematodes, Meloidogyne spp.

Two nematicide trials (one in the fall of 1984 and the other in the spring
of 1985) were conducted 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 experiments were 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 for both experiments. Plot size was 5 feet (1 row) X 38
feet. The nematicides involved in the test were:

1. Telone II (1,3-D), Dow Chemical Co.
2. Busan (SMDC), Buckman Laboratories, Inc.
3. Nemacur (fenamiphos), MOBAY Chemical Corp.
4. Mocap (ethoprop), Rhone-Poulenc, Inc.
5. Furadan (carbofuran), FMC Corp.
6. Vydate (oxamyl), E. I. DuPont de Nemours & Co., Inc.
7. Counter (terbufos), American Cyanamid Co.
8. Standak (aldoxycarb), Union Carbide Co.

In the fall experiment, the soil fumigant, Busan, was applied 3 inches deep
by chisel application (2 chisels spaced 10 inches apart). Immediately after
chemical application, 6-inch ridges were formed for this and other treatments. On
September 13, approximately 2 inches of the beds were removed for the treatment
Telone II, which was applied in a single line of injections spaced 10 inches apart
and 6 inches deep with a hand injector. On September 24, approximately 2 inches
of the ridges for the remaining treatments were removed with a leveling board and
nonfumigant materials applied. Nemacur, Mocap, 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. One treat-
ment consisted of 2 weekly foliar sprays of Vydate (beginning at 14 days) in
addition to a soil application of this material. 'Poinsett' cucumbers were seeded
on September 25. Cultural practices were normal for the area and the cucumbers
were harvested six times during November 13 December 10. Soil samples were
collected on November 26 for determining populations of the ectoparasitic nematode:
and on December 10, eight random plants were dug from each plot and the roots
indexed for root-knot nematode galling.









The results of the experiment are presented in Table 1. All treatments
appeared to have effectively reduced sting nematode populations, but only the
soil fumigants, Telone II and Busan, affected lance nematode populations. All
but Counter significantly reduced root-knot galling. All treatments signifi-
cantly increased yield indicating that the sting and root-knot nematodes were
the primary pests in the test.

Table 1. Effect of nematicides on nematode populations and yield of cucumbers.

Stinga Lancea Root-knot Yield
Treatment Rate/A nemas nemas index (Ib/plot)

Check -- 32 48 3.74 76

Telone II 5 gal 2 2 1.73 101

Busan 15 10 2 2.22 90
30 4 1 1.52 101
45 2 0 1.60 109

Vydate 2 lb 6 57 1.67 92
2 lb soil + 1 lb foliar 3 55 1.62 98

Nemacur 2 lb 3 41 1.87 90

Mocap 2 2 58 1.36 98
3 4 67 1.32 100

Furadan 2 7 92 1.72 96
3 14 57 2.00 103

Counter 2 3 75 2.97 97

Standak 2 2 89 2.25 88
3 2 49 2.37 97

LSD 0.05 0.86 12


aAverage number of nematodes extracted from 1003
Based on a root galling index of 1, no galling,


cm of soil.
to 5, severe galling.


The spring experiment was conducted in the same manner as the one in the
fall. The cucumber ridges were prepared on February 12, 1985. On February 19,
approximately 2 inches of the ridges were removed with a leveling board then
the soil fumigants, Telone II and Busan, were applied with a hand injector as in
the fall experiment. The nonfumigants were applied as previously on February 26,
and 'Poinsett' cucumbers were planted on February 28. The cucumbers were
harvested 7 times during May 1-28. Soil samples were collected for ecto-
parasitic nematode population determinations on April 29 and the roots were
indexed for root-knot nematode galling on May 28.











The results are presented in Table 2. These results are similar to those
obtained in the fall experiment; however, Busan applied at only 10 gal/A and
Standak at 2 or 3 Ib/A failed to reduced root-knot nematode galling. Neverthe-
less, all treatments increased yield significantly, indicating that sufficient
early nematode control had occurred to allow good growth and yield. Mocap
applied at 3 lb/A appeared to have been phytotoxic since growth and yield were
much less than when this material was applied at only 2 Ib/A.

Table 2. Effect of nematicides on nematode populations and yield of cucumbers.


Stinga Lancea Root-knotb Yield
Treatment Rate/A nemas nemas index (Ib/plot)

Check 38 104 3.76 22

Telone II 3 gal 15 2 2.30 111

Busan 10 23 14 3.70 95
S20 26 19 2.55 136

Nemacur 2 lb 9 140 1.95 106
3 19 146 1.72 127

Furadan 2 22 170 2.65 102
3 18 101 2.85 90

Mocap 2 11 88 2.74 90
3 18 123 2.05 60

Vydate 2 20 128 2.52 103
S3 12 131 2.71 120

Counter 2 14 125 2.75 94
3 12 92 2.68 85

Standak 2 16 124 4.12 81
S3 14 121 4.25 104

LSD 0.05 NS 74 0.65 36


aAverage number of nematodes extracted for 1003


cm of soil.


Based on a root galling index of 1, no galling, to 5 severe galling.




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