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Nematicide efficacy at managing Meloidogyne arenaria and non-target effects on free-living nematodes in peanut production

Zane J. Grabau
Zane J. Grabau
, 
Mark D. Mauldin
Mark D. Mauldin
, 
Alemayehu Habteweld
Alemayehu Habteweld
 et 
Ethan T. Carter
Ethan T. Carter
   | 16 avr. 2020
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Publié en ligne: 16 avr. 2020
Pages: 1 - 10
Reçu: 01 oct. 2019
DOI: https://doi.org/10.21307/jofnem-2020-028
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© 2020 Zane J. Grabau et al., published by Sciendo.
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1:

2017 peanut yield as affected by nematicide treatments. Different letters indicate significantly different means based on Fisher’s protected LSD at α = 0.05.
2017 peanut yield as affected by nematicide treatments. Different letters indicate significantly different means based on Fisher’s protected LSD at α = 0.05.

Omnivore-predator abundances/100 cm3 soil and diversity as affected by nematicide application for 2017 and 2018 trials combined.

Pi a Pm Pf
Omnivore-predators
Nematicide
 Control 37 19 33
 Aldicarb 50 24 29
 Fluopyram 38 11 19
 1,3-Dichloropropene 40 27 45
ANOVA b
 Nematicide (N) ns ns ns
 Year × Nematicide ns ns ns
Aporcelaimellus
Nematicide
 Control 22 9 12
 Aldicarb 27 11 15
 Fluopyram 16 6 6
 1,3-Dichloropropene 16 14 17
ANOVA
 Nematicide (N) ns ns ns
 Year × Nematicide ns ns ns
Hill’s N1 Genera Diversity
Nematicide
 Control 6.9 7.7 5.6
 Aldicarb 8.8 7.9 5.6
 Fluopyram 8.9 7.3 5.6
 1,3-Dichloropropene 8.1 5.9 6.2
ANOVA
 Nematicide (N) ns ns ns
 Year × Nematicide ns ns ns
Hill’s N1 Guild Diversity
Nematicide
 Control 3.9 4.2 2.9
 Aldicarb 4.6 4.3 3.0
 Fluopyram 4.5 4.1 2.9
 1,3-Dichloropropene 4.2 3.6 3.2
ANOVA
 Nematicide (N) ns ns ns
 Year × Nematicide ns ns ns

Fungivores abundances/100 cm3 soil as affected by nematicide application for 2017 and 2018 trials combined.

Pi a Pm b Pf
Fungivores
Nematicide
 Control 198 159 a 245 ab
 Aldicarb 214 82 ab 229 ab
 Fluopyram 217 130 a 323 a
 1,3-Dichloropropene 203 29 b 168 b
ANOVAc
 Nematicide (N) ns * *
 Year × Nematicide ns ns ns
Filenchus
Nematicide
 Control 42 31 a 58
 Aldicarb 27 19 ab 46
 Fluopyram 37 40 a 65
 1,3-Dichloropropene 23 6 b 46
ANOVA
 Nematicide (N) ns * ns
 Year × Nematicide ns ns ns
Aphelenchus
Nematicide
 Control 55 33 a 48
 Aldicarb 52 19 ab 51
 Fluopyram 63 27 ab 63
 1,3-Dichloropropene 66 11 b 23
ANOVA
 Nematicide (N) ns * ns
 Year × Nematicide * ns ns
Aphelenchoides
Nematicide
 Control 85 34 135
 Aldicarb 121 20 126
 Fluopyram 104 27 185
 1,3-Dichloropropene 109 11 92
ANOVA
 Nematicide (N) ns ns ns
 Year × Nematicide ns ns ns

Bacterivore abundances/100 cm3 soil as affected by nematicide application for 2017 and 2018 trials combined.

Pia Pm Pf
Bacterivores
Nematicide
 Control 515 356 360
 Aldicarb 508 305 360
 Fluopyram 540 337 484
 1,3-Dichloropropene 555 351 395
ANOVAb
 Nematicide (N) ns ns ns
 Year × Nematicide ns ns ns
Cephalobus
Nematicide
 Control 274 123 148
 Aldicarb 228 97 153
 Fluopyram 257 115 184
 1,3-Dichloropropene 261 123 144
ANOVA
 Nematicide (N) ns ns ns
 Year × Nematicide ns ns ns
Eucephalobus
Nematicide
 Control 50 56 46
 Aldicarb 79 57 47
 Fluopyram 63 59 82
 1,3-Dichloropropene 94 69 68
ANOVA
 Nematicide (N) ns ns ns
 Year × Nematicide ns ns ns
Acrobeles
Nematicide
 Control 72 70 24
 Aldicarb 92 66 35
 Fluopyram 83 75 36
 1,3-Dichloropropene 74 91 44
ANOVA
 Nematicide (N) ns ns ns
 Year × Nematicide ns ns ns

Schedule for data collection and trial maintenance.

Task 2017 2018
Preplant soil samples 10 April (39) 29 March (52)
1,3-D applied 5 May (14) 4 May (16)
Peanuts planted/in-furrow aldicarb and fluopyram applied 19 May 20 May
Midseason soil samples 20 July (62) 26 July (67)
Harvest soil and root samples 19 September (122) 24 September (126)
Peanuts inverted 2 October (135) 15 October (147)
Peanuts combined 5 October (138) 21 October (153)

Total herbivore and root-knot nematode abundances/100 cm3 soil as affected by nematicide application.

Pi a Pm Pf
Herbivores
Nematicide
 Control 606 348 1,506
 Aldicarb 310 370 1,428
 Fluopyram 321 375 1,779
 1,3-Dichloropropene 326 350 1,088
ANOVA b
 Nematicide (N) ns ns ns
 Year × Nematicide ns ns ns
Root-knot nematodes−2017
Nematicide
 Control 30 64 1,755
 Aldicarb 26 69 1872
 Fluopyram 58 72 2,284
 1,3-Dichloropropene 7 33 1,041
ANOVA
 Nematicide (N) ns ns ns
Root-knot nematodes−2018
Nematicide
 Control 725 12 348
 Aldicarb 437 11 35
 Fluopyram 403 13 281
 1,3-Dichloropropene 549 0 26
ANOVA
 Nematicide (N) ns ns ns
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