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Efficacy of Fluorinated Nematicides for Management of Root-knot Nematodes in California Processing Tomatoes

Antoon T. Ploeg

Antoon T. Ploeg

Department of Nematology, University of California RiversideRiverside,
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Ploeg, Antoon T.
, 
Scott Edwards

Scott Edwards

Department of Nematology, University of California RiversideRiverside,
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Edwards, Scott
, 
Angelo Loffredo

Angelo Loffredo

Department of Nematology, University of California RiversideRiverside,
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Loffredo, Angelo
 und 
Jörn Ole Becker

Jörn Ole Becker

Department of Nematology, University of California RiversideRiverside,
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Becker, Jörn Ole
  
23. Okt. 2024
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Artikel-Kategorie: Research Paper
Online veröffentlicht: 23. Okt. 2024
Eingereicht: 19. Apr. 2024
DOI: https://doi.org/10.2478/jofnem-2024-0034
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© 2024 Antoon T. Ploeg et al., published by Sciendo
This work is licensed under the Creative Commons Attribution 4.0 International License.

Figure 1.

Correlation between reduction in tomato root-galling (galldiff) and percent yield difference (yielddiff) relative to untreated control treatments from ten field trials. Line fitted according yielddiff = 0.63 × galldiff2 + 4.43 × galldiff. adjusted R2=0.83.
Correlation between reduction in tomato root-galling (galldiff) and percent yield difference (yielddiff) relative to untreated control treatments from ten field trials. Line fitted according yielddiff = 0.63 × galldiff2 + 4.43 × galldiff. adjusted R2=0.83.

Tomato fruit yield and root-galling at harvest as affected by nematicide treatments in ten field trials at the SouthCoast Research and Ex tension Center, Irvine, CA_

Trial Treatment number Product ai kg/ha Application method1 Timing2 kg/plant Galling index
I 1 untreated control 1.09b3 7.1a3
2 oxamyl 0.14 1 5 d pre 1.23ab 5.6b
0.14 2 21 d post
3 fluensulfone 3.84 1 5 d pre 1.48a 3.1c
P - value 0.031 0.002
II 1 untreated control 1.16b 7.0a
2 oxamyl 0.14 1 5 d pre 1.31ab 6.2a
0.14 2 21 d post
3 fluensulfone 3.84 1 5 d pre 1.42a 5.6ab
4 fluensulfone 3.84 1 5 d pre 1.23b 3.4b
3.84 2 21 d post
P - value 0.015 0.007
III 1 untreated control 1.00 7.7a
2 oxamyl 0.56 1 at-plant 1.11 7.2ab
0.56 2 28 d post
3 fluensulfone 2.97 1 7 d pre 1.27 6.6b
4 fluensulfone 4.00 1 7 d pre 1.24 6.4b
P - value 0.12 0.007
IV 1 untreated control 1.18 7.6a
2 oxamyl 1.12 2 at-plant 1.29 6.2ab
1.12 2 15 d post
3 fluensulfone 1.40 1 7 d pre 1.32 6.5ab
4 fluensulfone 1.96 1 7 d pre 1.49 4.9bc
5 fluensulfone 2.81 1 7 d pre 1.37 4.5cd
6 fluazaindolizine 0.56 2 at-plant 1.47 3.3cd
7 fluazaindolizine 0.28 2 at-plant 1.41 3.9cd
0.28 2 15 d post
8 fluazaindolizine 0.56 2 at-plant 1.61 2.8d
0.28 2 15 d post
P - value 0.06 <0.001
V 1 untreated control 0.74c 9.1a
2 fluazaindolizine 0.56 2 at-plant 1.23a 2.5de
0.56 2 14 d post
0.56 2 28 d post
3 fluazaindolizine 1.12 2 at-plant 1.20a 2.2e
0.56 2 14 d post
0.56 2 28 d post
4 fluensulfone 2.97 1 14 d pre 0.91bc 4.2cd
5 fluensulfone 4.00 1 14 d pre 1.06ab 3.4cde
6 oxamyl 1.12 2 at-plant 0.95b 6.8ab
1.12 2 14 d post
7 fluopyram 0.25 2 at-plant 1.04ab 4.9bc
0.25 2 14 d post
P - value <0.001 <0.001
VI 1 untreated control 1.05 5.5a
2 fluazaindolizine 0.56 2 at-plant 1.38 1.5c
0.56 2 14 d post
0.56 2 28 d post
3 fluazaindolizine 1.12 2 at-plant 1.43 1.1c
0.56 2 14 d post
0.56 2 28 d post
4 fluazaindolizine 1.12 1 3 d pre 1.34 2.4bc
0.56 2 14 d post
0.56 2 28 d post
5 oxamyl 1.12 2 at-plant 1.18 5.5a
1.12 2 14 d post
1.12 2 28 d post
6 fluopyram 0.25 2 at-plant 1.19 4.3ab
7 fluopyram 0.25 2 at-plant 1.45 2.2bc
0.25 2 14 d post
8 fluopyram 0.25 2 at-plant 1.34 2.1bc
0.25 2 28 d post
P - value 0.21 <0.001
VII 1 untreated control 1.34 5.8a
2 fluopyram 0.25 2 at-plant 1.62 2.7b
0.25 2 14 d post
3 fluensulfone 2.97 1 14 d pre 1.32 5.8a
4 fluensulfone 4.00 1 14 d pre 1.44 4.1ab
5 fluazaindolizine 1.12 2 at-plant 1.61 2.4b
0.56 2 14 d post
6 fluazaindolizine 0.56 2 at-plant 1.51 3.0b
0.56 2 14 d post
0.56 2 28 d post
7 fluazaindolizine 2.24 1 3 d pre 1.36 3.7ab
8 fluazaindolizine4 2.24 1 3 d pre 1.52 3.6ab
9 fluazaindolizine 2.24 1 10 d pre 1.49 3.6ab
10 fluazaindolizine4 2.24 1 10 d pre 1.30 4.1ab
P - value 0.17 <0.001
VIII 1 untreated control 4.07 3.4a
2 fluensulfone 2.80 1 7 d pre 3.80 1.0b
P - value 0.70 0.009
IX 1 untreated control 2.00 5.6 (a)
2 fluazaindolizine 1.12 2 at plant 1.98 4.4(ab)
3 fluazaindolizine 2.24 2 at plant 2.10 2.7(b)
4 fluazaindolizine 1.12 2 at plant 1.96 3.3(ab)
0.56 2 30 d post
5 fluazaindolizine 1.12 2 at plant 2.04 4.3(ab)
1.12 2 30 d post
6 fluopyram 0.19 2 at plant 2.12 3.7(ab)
P - value 0.99 0.07
X 1 untreated control 2.50 6.0(a)
2 fluensulfone 2.97 1 7 d pre 2.55 5.6(ab)
3 fluensulfone 4.00 1 7 d pre 2.80 4.4(ab)
4 fluopyram 0.19 1 at plant 2.70 5.6(ab)
5 fluazaindolizine 1.12 1 at plant 2.53 4.1(ab)
6 fluazaindolizine 2.24 1 at plant 2.66 3.7(b)
P - value 0.99 0.07
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