Group Title: Research report - West Florida Research and Education Center ; 1999-6
Title: Evaluation of DiTera for management of Hoplolaimus galeatus and Belonolaimus longicaudatus on turf
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Permanent Link: http://ufdc.ufl.edu/UF00053547/00001
 Material Information
Title: Evaluation of DiTera for management of Hoplolaimus galeatus and Belonolaimus longicaudatus on turf
Series Title: Research report
Physical Description: 2 leaves : ; 28 cm
Language: English
Creator: Kinloch, Robert A
Unruh, J. Bryan ( Joseph Bryan )
West Florida Research and Education Center
Publisher: University of Florida, West Florida Research and Education Center
Place of Publication: Jay Fla
Publication Date: 1999]
 Subjects
Subject: Nematocides -- Florida   ( lcsh )
Bermuda grass -- Diseases and pests -- Florida   ( lcsh )
Genre: government publication (state, provincial, terriorial, dependent)   ( marcgt )
non-fiction   ( marcgt )
 Notes
Statement of Responsibility: R.A. Kinloch and J.B. Unruh.
General Note: Caption title.
General Note: Series number hand-changed.
 Record Information
Bibliographic ID: UF00053547
Volume ID: VID00001
Source Institution: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: oclc - 62319952

Full Text

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Q 5 QEvaluation of DiTera for Management of
9- Hoplolaimus galeatus and Belonolaimus longicaudatus on Turf

gaMABST SCIENCE LIBRARi
R. A. Kinloch and J. B. Unruh fRbN SCICE LIBRAI
MAR 2 9 10
University of Florida
West Florida Research and Education Center

Research Report 1999-4


A fungal distillation product, DiTera [Abbot Laboratories], was evaluated for its efficacy to
manage lance (Hoplolaimus galeatus) and sting (Belonolaimus longicaudatus) nematodes
infesting bermudagrass turf on the Fort Walton Beach Golf Course, Fort Walton Beach, Florida,
during 1998.

A site exhibiting poor turf growth symptoms on the east practice putting green of the golf
course was demarcated into 36 1-m2 plots. These were sampled for nematodes on 13 May by
removing five soil cores (2.54 cm wide X 20-cm deep), mixing the cores, and processing a 100
cm3 sub-sample via sugar centrifugation (Jenkins, 1964). Six replicates of six treatments, including
a non-treated check, were assigned to different plots such that the average pre-treatment numbers
of targeted nematodes were equally distributed among the treatments. All treatments were applied
surface-broadcast and drenched with irrigation water. Treatments applied on 28 May were
Nemacur [Rhone-Poulenc] at 112.1 kg/ha and DiTera at 28, 14.6 (two series), and 5.6 kg/ha. One
series of plots treated with 14.6 kg/ha DiTera and those receiving 5.6 kg/ha were repeatedly
treated with the same dosages on 10 June, 22 June, 9 July, and 23 July. Nematode soil population
density assays were repeated as described on 22 June, and 6 August. Turf quality ratings based on
a scale of 1 (poor) to 9 (excellent) were taken on 28 May and 6 July.

Numbers of lance nematodes averaged 127/100 cm3 soil across the plots prior to treatment and
remained at approximately the same level throughout the study (Table 1). Numbers of sting
nematodes were low at the initiation of the study and declined to almost undetectable levels at the
conclusion. No treatment had a significant effect on nematode population densities at any of the
sampling dates. Turf quality ratings improved between the two evaluation dates and no treatment
had a significant influence on them (Table 2).


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Table 1. Influence of DiTera and Nemacur on the soil population densities of lance,
Hoplolaimus galeatus, and sting, Belonolaimus longicaudatus, nematodes on bermudagrass turf.
Fort Walton Beach Golf Course, Florida, 1998.


Treatment Lai

No. applications (x) 13 May

Check (0) 141

DiTera 28 kg/ha (1) 144

DiTera 14.6 kg/ha (1) 118

DiTera 14.6 kg/ha (5) 118

DiTera 5.6 kg/ha (5) 122

Nemacur 112.1 kg/ha (1) 116

P < 0.05 nsd
Data are averages of six observations.


nce/100 cm3 soil

22 June 6 August

137 179

141 132

98 117

100 138

99 131

75 101


Sting/100 cm3 soil

13 May 22 June 6 August
1 2 0

4 2 1

4 4 0


nsd nsd nsd nsd nsd


Table 2. Influence of DiTera and Nemacur on bermudagrass turf quality ratings. Fort Walton
Beach Golf Course, Florida, 1998.


Treatment

No. applications (x)

Check (0)

DiTera 28 kg/ha (1)

DiTera 14.6 kg/ha (1)

DiTera 14.6 kg/ha (5)

DiTera 5.6 kg/ha (5)

Nemacur 112.1 kg/ha (1)
P < 0.05
Data are averages of six observations.


Turf quality rating 1 (poor) to 9 (excellent)

28 May 6 July

4.8 7

5.7 7

5.7 7

5.3 7

5.3 7


9809R


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