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

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)

1 Note: Numbers in parentheses are days before or after planting.

Table 2.

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

1 Notes: Herbivores are displayed for 2017 and 2018 trials combined. Root-knot nematode values are displayed for 2017 and 2018 separately. ^aPi, Pm, and Pf are mean values prior to planting, at midseason (62 and 67 days after planting in 2017 and 2018), and at harvest, respectively. ^bns represents not significant at P > 0.05.

Table 3.

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
ANOVA^c
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

1 ^aPi, Pm, and Pf are mean values prior to planting, at midseason (62 and 67 days after planting in 2017 and 2018), and at harvest, respectively. ^bValues followed by different letters in the same column for the same variable are significantly different according to Fischer’s LSD at P < 0.05. *Represent significant effects at P ≤ 0.05; ns represents not significant at P > 0.05.

Table 4.

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

	Pi^a	Pm	Pf
Bacterivores
Nematicide
Control	515	356	360
Aldicarb	508	305	360
Fluopyram	540	337	484
1,3-Dichloropropene	555	351	395
ANOVA^b
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

1 Notes: ^aPi, Pm, and Pf are mean values prior to planting, at midseason (47 and 64 days after planting in 2017 and 2018), and at harvest, respectively; ^bns represents not significant at P > 0.05.

Table 5.

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

1 Notes: ^aPi, Pm, and Pf are mean values prior to planting, at midseason (47 and 64 days after planting in 2017 and 2018), and at harvest, respectively;

2 ^bns represents not significant at P >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.

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Articles in this issue

DOI: https://doi.org/10.21307/jofnem-2020-028 | Journal eISSN: 2640-396X | Journal ISSN: 0022-300X

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Language: English

Page range: 1 - 10

Submitted on: Oct 1, 2019

Published on: Apr 16, 2020

Published by: Society of Nematologists, Inc.

In partnership with: Paradigm Publishing Services

Publication frequency: 1 issue per year

Keywords:

Meloidogyne arenaria ,

nematode community,

nematicide,

peanut,

peanut root-knot nematode

Related subjects:

Life sciences,

Life sciences, other

© 2020 Zane J. Grabau, Mark D. Mauldin, Alemayehu Habteweld, Ethan T. Carter, published by Society of Nematologists, Inc.
This work is licensed under the Creative Commons Attribution 4.0 License.

Volume 52 (2020): Issue 1 (January 2020)

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

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Table 2.

Table 3.

Table 4.

Table 5.

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