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Group Title: Research report - North Florida Experiment Station, University of Florida - 94:9
Title: Application of nematicides to peanut at varying lifestage intervals for management of Meloidogyne arenaria
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Permanent Link: http://ufdc.ufl.edu/UF00073723/00001
 Material Information
Title: Application of nematicides to peanut at varying lifestage intervals for management of Meloidogyne arenaria
Series Title: IFAS NFREC Research report
Physical Description: 4 leaves : ; 28 cm.
Language: English
Creator: Rich, J. R ( Jimmy Ray ), 1950-
Gorbet, Daniel W ( Daniel Wayne ), 1942-
North Florida Research and Education Center (Quincy, Fla.)
Publisher: North Florida Research and Education Center
Place of Publication: Quincy FL
Publication Date: 1994
 Subjects
Subject: Peanuts -- Diseases and pests -- Control -- Florida   ( lcsh )
Nematode diseases of plants -- Control -- Florida   ( lcsh )
Peanuts -- Effect of pesticides on -- Florida   ( lcsh )
Genre: government publication (state, provincial, terriorial, dependent)   ( marcgt )
non-fiction   ( marcgt )
 Notes
Statement of Responsibility: Jimmy R. Rich, Daniel W. Gorbet.
General Note: Cover title.
Funding: Research report (North Florida Research and Education Center (Quincy, Fla.)) ;
 Record Information
Bibliographic ID: UF00073723
Volume ID: VID00001
Source Institution: Marston Science Library, George A. Smathers Libraries, University of Florida
Holding Location: Florida Agricultural Experiment Station, Florida Cooperative Extension Service, Florida Department of Agriculture and Consumer Services, and the Engineering and Industrial Experiment Station; Institute for Food and Agricultural Services (IFAS), University of Florida
Rights Management: All rights reserved, Board of Trustees of the University of Florida
Resource Identifier: oclc - 84649234

Table of Contents
    Copyright
        Copyright
    Title Page
        Page 1
    Materials and methods
        Page 2
    Results and discussion
        Page 3
        Page 4
    Tables
        Page 5
Full Text





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











SIFAS NFREC Research Report 94: 9


















Application of Nematicides to Peanut at Varying Lifestage

Intervals for Management of Meloidogyne Arenaria


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Jimmy R. Rich
University of Florida
Route 3 Box 4370
Quincy, FL 32351


Daniel W. Gorbet
University of Florida
3925 Highway 71
Marianna, FL 32446


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At-pegging nematicide treatments on peanut are a part of

standard recommendations for management of the peanut root-knot

nematode, Meloidogyne arenaria. Application has generally been

recommended in a 14-18" band at 35-45 days after planting. While

this has been widely accepted for use on peanut cultivars such as

Florunner, little information is available on longer season

cultivars like Southern Runner. This test was conducted to

determine if nematicide treatment later in the season may be more

beneficial for longer season cultivars.

Materials and Methods

A field trial was conducted at the IFAS North Florida Research

and Education Center, Marianna, in a Chipola loamy sand soil

infested with the peanut root-knot nematode, Meloidoqyne arenaria.

The site contained preplant populations of M. arenaria averaging

127/100 cm3 of soil. Before planting, the plot area was prepared

by moldboard plowing and double discing. Plots were 2 rows (36"

wide rows) by 20' long. Treatments were placed in a randomized

complete block design and replicated 6 times.

All materials placed in the test were granular formulations

except the liquid formulation of SM-9. Initial chemical

applications were made at-planting of Southern Runner peanut on May

21, 1993 (Table 1). The granular materials were applied with two

tractor-mounted Gandy applicators in a 12-14" band over the row.

\ An at-planting Thimet treatment was similarly applied and utilized

as the control treatment. Over the top "pegging time" treatments

were applied at 4 different time intervals at the same band width.

The SM-9 was applied in 20 gal. of water/A broadcast and double-








disc incorporated to 3-4" deep.

Peanut plants were observed for symptoms of phytotoxicity over

the season. Soil samples were taken in-row on September 14, and

five soil cores (1" dia.) to 10" deep were taken in each plot and

composite. Nematodes were extracted from soil utilizing the

centrifugation, sugar-flotation technique and quantitated to number

of juveniles/100 cm3 soil.

Peanuts were dug on November 2 and combined on November 8.

In-shell peanuts were force air-dried to 10% moisture, weighed, and

yields converted to Ibs/A. Additionally, peanut pods were rated

for quality on a relative scale of 1-5 where 5 showed the most pods

galled and discolored.

Results and Discussion
Peanut growth was good in all plots, and no phytotoxocity was

observed in any of the treatments. Application of Temik at 84 and

103 days significantly improved yield compared to the other

treatments and the control. Pod quality index was generally best

in the higher yielding treatments and conversely worse in the lower

yielding treatments. Nematode numbers were variable and

corresponded less to peanut yield.

Data from this test may indicate that later applications of

"pegging time" treatments could be useful for longer season

varieties such 'as Southern Runner. A positive effect on pod

quality index may also be a beneficial by-product of later

applications. These data, however, should only be seen as an

indication since populations of nematodes were low and variable in

the plots. Additionally, peanuts were grown under dryland








conditions which could have affected the results in this

experiment. Nevertheless, further tests under more controlled

conditions appear to be warranted from these data.







Influence of "pegging time" nematicide treatment on


.peanut yield, pod quality index and root-knot nematode numbers.



Formulation Days after Yield Pod Nematodes/

Chemical in lbs./A1 planting2 lbs/A index3 100 cm3 soil



Temik 15G 10.0 103 3240 a4 1.67 a 451 ab

Temik 15G 10.0 84 3087 a 2.00 a 410 ab

SM-9 2.0 0 2900 b 3.17 bc 347 ab

Nemacur 15G 16.7 0 2848 b 2.33 abc 566 a

Temik 15G 10.0 49 2788 b 2.00 a 406 ab

Temik 15G 10.0 28 2748 b 2.50 abc 193 b

Temik 15G 10.0 0 2745 b 2.17 ab 413 ab

Thimet 15G 6.7 0 2738 b 3.33 c 274 ab

Mocap 15G 16.7 84 2702 b 3.17 bc 183 b



1 The SM-9 treatment rate is listed as quarts/A.

2 Zero (0) indicates application at-planting only while all other

treatments received a 10 lbs/A application of Temik at-planting

plus the amount of Temik or Mocap specified at days after

planting.

3 Pod quality index was based on a relative scale of 1-5 with 5

representing the most severe pod galling and discoloration.

4 Column means followed by the same letter are not significantly

different (P<0.05) according to Duncan's Multiple Range Test.


Table 1.




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