| ||Title Page|
| ||Materials and methods|
| ||Results and discussion|
| Material Information
||Application of nematicides to peanut at varying lifestage intervals for management of Meloidogyne arenaria
||IFAS NFREC Research report
||4 leaves : ; 28 cm.
||Rich, J. R ( Jimmy Ray ), 1950-
Gorbet, Daniel W ( Daniel Wayne ), 1942-
North Florida Research and Education Center (Quincy, Fla.)
||North Florida Research and Education Center
||Place of Publication:
||Peanuts -- Diseases and pests -- Control -- Florida ( lcsh )
Nematode diseases of plants -- Control -- Florida ( lcsh )
Peanuts -- Effect of pesticides on -- Florida ( lcsh )
||government publication (state, provincial, terriorial, dependent) ( marcgt )
non-fiction ( marcgt )
||Statement of Responsibility:
||Jimmy R. Rich, Daniel W. Gorbet.
||Research report (North Florida Research and Education Center (Quincy, Fla.)) ;
|Table of Contents
Materials and methods
Results and discussion
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
site maintained by the Florida
Cooperative Extension Service.
Copyright 2005, Board of Trustees, University
SIFAS NFREC Research Report 94: 9
Application of Nematicides to Peanut at Varying Lifestage
Intervals for Management of Meloidogyne Arenaria
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
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
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.