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Group Title: IFAS NFREC Quincy research report - University of Florida Institute of Food and Agricultural Sciences ; 93-6
Title: Monsanto cucumber nematicide trial, 1992
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Permanent Link: http://ufdc.ufl.edu/UF00074346/00001
 Material Information
Title: Monsanto cucumber nematicide trial, 1992
Series Title: IFAS NFREC Quincy research report
Physical Description: 4 leaves : ; 28 cm.
Language: English
Creator: Rich, J. R ( Jimmy Ray ), 1950-
Hochmuth, Robert C ( Robert Conway ), 1957-
North Florida Research and Education Center (Quincy, Fla.)
Publisher: North Florida Research and Education Center
Place of Publication: Quincy Fla
Publication Date: 1993
 Subjects
Subject: Cucumbers -- Diseases and pests -- Control -- Florida   ( lcsh )
Nematode diseases of plants -- Control -- Florida   ( lcsh )
Genre: government publication (state, provincial, terriorial, dependent)   ( marcgt )
non-fiction   ( marcgt )
 Notes
Statement of Responsibility: Jimmy R. Rich, Robert C. Hochmuth.
General Note: Cover title.
Funding: Research report (North Florida Research and Education Center (Quincy, Fla.)) ;
 Record Information
Bibliographic ID: UF00074346
Volume ID: VID00001
Source Institution: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: oclc - 85763763

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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




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MONSANTO CUCUMBER NEMATICIDE TRIAL 1992


IFAS NFREC Quincy Research Report 93-6


Jimmy R. Rich
North Florida Research
and Education Center
Route 3 Box 4370
Quincy, Florida 32351


Robert C. Hochmuth
Suwannee Valley Agricultural
Research and Education Center
Route 2 Box 2181
Live Oak, Florida 32060


eP!l o0 A4!sJaOAun









Plant parasitic nematodes are one of the most limiting factors

in field crop and vegetable production in north Florida. As part

of the Nematology Research program based at the IFAS North Florida

Research and Education Center, Quincy, a test was conducted at Live

Oak with cucumber utilizing experimental nematicides from the

Monsanto Company.

Materials and Methods

A field trial was conducted at the IFAS Suwannee Valley

.Agricultural Research and Education Center, Live Oak, in a Lakeland

fine sand (93% sand, 4% silt, and 3% clay) infested with the peanut

root-knot nematode, Meloidoqyne arenaria, and stubby root

nematodes, Trichodorus spp. Preplant populations of M. arenaria

were 76/100 cm3 soil and 70/100 cm3 soil for Trichodorus spp.

Soybeans were planted in the field for the previous two years to

maintain nematode populations. The land was prepared by moldboard

plowing, double disking and rototilling. Plots were 25' long by

7.5' wide containing a single row. Treatments were placed in a

randomized complete block design and replicated six times.

Telone II was applied with a single chisel at 12" deep on

March 24, 1992. Before planting on April 7, 1992, granular

products were manually applied in a 4" wide furrow. Appropriate

rates of the materials were mixed in 200 g of dry sand for each

plot to insure uniform distribution. The liquid materials were

applied in 20 gal./A water over a 4" furrow in a 10" wide band

using a single 8005 Teejet nozzle. Seed of 'Dasher' cucumber were

planted to obtain an in-row spacing of 12" between plants. Normal

cultural practices, including overhead irrigation, were followed in









producing the crop. Foliar applied treatments were initiated on

May 15, 1992, with the first application made at the rate of 20

gal./A of water, and subsequent applications at 30 gal./A.

Applications were made biweekly using three nozzles per row.

Cucumbers were observed for signs of phytotoxicity and

differences in plant growth monitored. The crop was harvested 10

times beginning on June 1, 1992 and ending on June 22, 1992. On

June 25, root gall ratings were made on four plants/plot using a 0-

4 scale where 0 = no root galling and 4 = 76-100% of the roots

galled. Five 1" diameter soil cores were taken to a 12" depth in-

row from each plot and composite. Nematodes were extracted from

soil with the centrifugation-sugar floatation technique and

expressed as numbers per 100 cm3 soil.

Summary

Data from this test were highly variable, particularly in

fruit yields. This was due predominately to uneven distribution of

nematodes that resulted in wide variances in yield data. Also, the

crop was maintained under optimum conditions for nutrients and

water, thus further minimizing differences in fruit yield.

However, root galling data would indicate that the at-plant

chemical applications produced the lowest gall ratings. These data

are consistent with other results that indicate the most critical

time for nematode management is in the first 4-6 weeks after

planting annual crops.







Table 1.


Influence of nematicides on root gall rating and yield of 'Dasher' cucumber in a
field trial at Live Oak, Florida, 1992.


Application Root Yield in
Treatment Product/A Methods1 Galling2 Ibs./Plant


Nemacur-3SC 42 oz. At-plant 0.33 a3 3.63 abc

MON 55510-10G 10 lbs At-plant 0.60 ab 3.02 c

Vydate-2L + 128 fl. oz. At-plant 0.65 ab 4.15 ab
MON 55567-4SL 16 fl. oz. 2X foliar

MON 55510-10G + 5 lbs. At-plant 0.77 abc 3.05 c
MON 55567-4SL 16 fl. oz. 2X foliar

MON 31342-10G + 5 lbs. At-plant 1.03 abcd 2.63 c
MON 31306-4SL 16 fl. oz. 3X foliar

MON 55567-4SL 32 fl. oz. 3X foliar 1.20 abcd 4.30 a

Vydate-2L + 128 fl. oz. At-plant
Vydate-2L 64 fl. oz. 2X foliar 1.27 bcde 3.63 abc

MON 55510-10G + 5 Ibs. At-plant 1.48 bcde 2.91 c
MON 55567-4SL 16 fl. oz. 3X foliar

MON 55567-4SL 16 fl. oz. 3X foliar 1.60 cde 3.46 abc

MON 55567-4SL 24 fl. oz. 3X foliar 1.62 cde 3.19 bc

Control --- --- 1.72 de 3.52 abc

Telone II 4.8 gal Preplant 1.99 e 3.21 bc


SFoliar applications were initiated when plants were approximately 6" tall and
were made every 14 days depending upon treatment protocol.


applications


2 Root gall ratings based upon a 0-4 scale were 0 = no root galling, 1 = 1-25 %, 2 = 26-50,
3 = 51-75%, and 4 = 76-100% of the plant root galled. Ratings were made on June 25 after
final harvest.
3 Column means followed by the same letter are not significantly different (P > 0.05)
according to Duncan's Multiple Range test.





Table 2. Nematode
1992.1,2


numbers 79 days after planting 'Dasher' cucumbers in a field trial at Live Oak, Florida,.


Application Total Root-Knot Stubby-Root Lesion
Treatment Product/A Method Nematodes Nematodes Nematodes Nematodes


MON 55567-4SL

Nemacur-3SC

MON 55510-10G +
MON 55567-4SL

MON 55567-4SL

Telone II

Vydate-2L +
Vydate-2L

MON 31342-10G +
MON 31306-4SL

Control

MON 55510-10G

Vydate-2L +
MON 55567-4SL

MON 55510-10G +
MON 55567-4SL

MON 55567-4SL


32 fl. oz.

42 oz.

5 lbs.
16 fl. oz.

24 fl. oz.

4.8 gal

128 fl. oz.
64 fl. oz.

5 Ibs.
16 fl. oz.



10 lbs

128 fl. oz.
16 fl. oz.

5 lbs.
16 fl. oz.

16 fl. oz.


3X foliar

At-plant

At-plant
2X foliar

3X foliar

Preplant

At-plant
2X foliar

At-plant
3X foliar



At-plant

At-plant
2X foliar

At-plant
3X foliar

3X foliar


1 Nematodes were extracted with
cm3 soil.

2 No significant differences (P


a centrifugation-sugar


floatation technique and represent numbers


> 0.05).


91

94


113


132


per 100




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