Group Title: Research report (North Florida Research and Education Center (Quincy, Fla.))
Title: Application of nematicides to peanut at varying lifestage intervals for management of the peanut root-knot nematode
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 Material Information
Title: Application of nematicides to peanut at varying lifestage intervals for management of the peanut root-knot nematode
Series Title: Research report (North Florida Research and Education Center (Quincy, Fla.))
Physical Description: 5 leaves : ; 28 cm.
Language: English
Creator: Rich, J. R ( Jimmy Ray ), 1950-
Gorbet, Daniel W ( Daniel Wayne ), 1942-
Barber, Stacey K
North Florida Research and Education Center (Quincy, Fla.)
Publisher: North Florida Research and Education Center
Place of Publication: Quincy Fla
Publication Date: 1995
Subject: Peanuts -- Effect of pesticides on   ( lcsh )
Nematocides   ( lcsh )
Genre: bibliography   ( marcgt )
non-fiction   ( marcgt )
Bibliography: Includes bibliographical references.
Statement of Responsibility: Jimmy R. Rich, Daniel W. Gorbet, Stacey K. Barber.
General Note: Cover title.
 Record Information
Bibliographic ID: UF00066133
Volume ID: VID00001
Source Institution: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: oclc - 71188527

Full Text

IFAS NFREC Research Report 95:5


Marston Science

APR 18 1995

University of Florida

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

Daniel W. Gorbet
University of Florida
3925 Highway 71
Marianna, FL 32466

Stacey K. Barber
University of Florida
Route 3, Box 4370
Quincy, FL 32351

At-pegging nematicide treatment on peanut is a part of standard

recommendations for management of the peanut root-knot nematode, Meloidogvne

arenaria. Application has generally been recommended in a 14" inch band at 35

days after planting. While this has been widely accepted for use in peanut

cultivars such as Florunner, little information is available on longer season cultivars

such as Southern Runner. This test, in its second year, was conducted to

determine if nematicide treatment later in the season may be more beneficial in

longer season cultivars.


A field trial was conducted on the John King Farm near Greenwood, Florida

in a Chipola loamy sand soil infested with the peanut root-knot nematode,

Meloidogvne arenaria. The site was previously in tomato and contained preplant

populations of M. arenaria averaging 20/100 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 in the test were granular formulations, and initial chemical

applications were made at-planting of Southern Runner peanut on May 19, 1994

(Table 1). The granular nematicides were applied with two tractor-mounted Gandy

applicators as a modified infurrow, 8" wide band over the row. Over the top

"pegging time" treatments were applied at 5 different time intervals at a band

width of 12-14 inches.

Peanut plants were observed for symptoms of phytotoxicity over the season.

Soil samples were taken in-row on September 15, and six soil cores (1" dia.) to

10" deep were taken in each plot and composite. Nematodes were extracted

from a 100 cm3 aliquant of soil from each plot utilizing the centrifugation-sugar

flotation technique and juveniles were counted.

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

were force air-dried to 10% moisture, weighed, and yield converted to Ibs./A.


Early to midseason peanut growth was good in all plots, and no

phytotoxocity was observed in any of the treatments. Unfortunately, later in the

season, plants in two replications began dying from disease, primarily

Cylindrocladium black rot. Two replicates were subsequently discarded leaving

data from only four replicates for analysis.

At-pegging application of Temik at 28 and 70 days significantly improved

yield compared to the control. All at-pegging Temik 15G treatments numerically

increased yield over the at-planting Temik alone by greater than 250 Ibs./A and the

control by over 450 Ibs./A. Nematode numbers were variable and corresponded

only somewhat to peanut yield.

Data from this test may indicate that "at-pegging" applications may be made

later than the normally recommended 35 days after planting and could improve

yield when applied up to 70 days after planting. Thus, at-pegging applications

from 28-70 days could be useful for longer season varieties such as Southern

Runner. These data, however, should only be seen as an indication since

populations of nematodes low and were variable in the plots.


Data from two years testing indicated differing results concerning application

timing but good yield increases at all at-pegging time treatments with Temik.

These data probably indicate an interaction between environment and nematode

population levels. These tests plus two others, however, indicate a greater than

300 Ib./A yield advantage in applying the at-pegging treatment at dates ranging

from 28-85 days; however, the latter date is not a labeled application.

Table 1. Effect of "pegging-time" nematicide treatment on peanut yield, root galling

and nematode numbers in a Jackson county field trial, 1994.

Formulation Days after Yield M. arenania

Chemical1 Ibs/A2 planting2 Ibs/A 100 cm3 soil

Temik 15G 10.0 28 2870a* 327

Temik 15G 10.0 70 2630ab 326

Temik 15G 10.0 56 2386abc 165

Temik 15G 10.0 91 2322abc 510

Temik 15G 10.0 112 2310abc 452

Nemacur 15G 13.3 0 2277bc 379

Temik 15G + 10.0 + 0 + 2043c 537
Mocap 15G 16.7 91

Temik 15G 10.0 0 2004c 468

Control --- --- 1810c 562

Data significantly different at the P 50.05 according to Duncan's Multiple Range


1 Zero (0) indicates at-planting only while all other treatments, except the control,

received 10 Ibs/A of Temik 15G at-planting plus 10 Ibs. of Mocap 15G or Temik 15G

at the days specified after planting.

2All treatments were made as a modified in-furrow application and banded 8" wide at-

planting. At-pegging treatments were made as a 12-14" band application.

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