Stink bug control at different stages of soybean development

Ecco, Marlon; Borella Júnior, Célio; Miranda, Débora de Souza; Araújo, Marcio Silva; Almeida, André Cirilo de Sousa; Jesus, Flávio Gonçalves de

doi:10.1590/1808-1657001132018

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SCIENTIFIC ARTICLE • Arq. Inst. Biol. 87 • 2020 • https://doi.org/10.1590/1808-1657001132018 copy

Stink bug control at different stages of soybean development

Controle de percevejos em diferentes estádios de desenvolvimento da planta de soja

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

This study evaluates the effects of combinations of pyrethroids and neonicotinoids on the control of stink bugs at different stages of soybean crop development. The experiment was set up in a factorial randomized block design (4×6: 4 treatments and 6 stages) with 4 repetitions. The following treatments were tested during the V6/V7, R2, R4, R5.1, R5.5 and R 6 phenological stages: 1 – control (no application), 2 – thiamethoxam + λ-cyhalothrin, 3 – acetamiprid + α-cypermethrin, and 4 – dinotefuran + α-cypermethrin. Infestation, number of damaged seeds, number of pods, number of pods per plant, and yield (kg/ha) were evaluated. Stink bug infestations were smaller when applications commenced during the vegetative stages (V6-V8). Pod numbers and yields were highest in the dinotefuran + α-cypermethrin treatment with applications from V6/V8 to R4. The active ingredients dinotefuran + α-cypermethrin reduced stink bug populations and increased yields and could therefore be considered in integrated pest management (IPM) programs for soybean crops.

KEYWORDS
Glycine max ; stink bugs; pentatomids; chemical control

Stages (S)	INF¹ 1 INF = infestation (nº of stink bugs·plot-1)	NPD² 2 NPD = number of pods (10 plants)	PDS³ 3 PDS = percentage of damaged seeds (%) and	YLD⁴ 4 >YLD = yield (kg·ha-1).Means followed by the same letter within the same column do not differ by the LSD test (5%).
V6/V8	11.00 d	604.94 b	37.91 e	3334.68 a
R1	12.88 c	640.31 a	39.54 d	3065.70 b
R4	14.75 b	594.44 b	43.46 c	3054.06 b
R5.3	14.88 b	483.75 c	71.81 a	2817.04 c
R5.5	15.00 b	477.00 c	71.36 ab	2631.49 d
R6	16.69 a	463.19 c	70.31 b	2175.14 e
F (E)	11.09	49.07	1347.39	57.01
P (E)	P < 0.05	P < 0.05	P < 0.05	P < 0.05
Treatment (T)	INF	NPD	PDS	YLD
Control	27.50 a	2325.52 d	71.375 a	474.63 c
Thiamethoxam + λ-cyhalothrin	7.88 c	3060.93 b	50.09 c	573.46 a
Acetamiprid + α-cypermethrin	14.96 b	2657.06 c	54.37 b	535.50 b
Dinotefuran + α-cypermethrin	6.46 d	3341.90 a	47.09 d	592.17 a
F (T)	392.95	103.14	822.95	32.81
P (T)	P < 0.05	P < 0.05	P < 0.05	P < 0.05
F (SxT)	1.88	6.63	176.34	8.29
P (SxT)	P < 0.05	P < 0.05	P < 0.05	P < 0.05
CV (%)	16.74%	7.57%	3.32%	8.16%

Stages	Number of stink bugs (m²)¹ 1 Means followed by the same upper-case letters in columns and lower-case letters in rows, do not differ by the LSD test (5%).
Stages	Control	Thiamethoxam + λ-cyhalothrin	Acetamiprid + α-cypermethrin	Dinotefuran + α-cypermethrin	P (S)
V6/V8	26.75 Aa	3.75 Cc	9.75 Cb	3.75 Ac	P < 0.05
R1	27.75 Aa	6.75 BCc	11.75 Cb	5.25 Ac	P < 0.05
R4	28.75 Aa	8.25 Abc	15.25 Bb	6.75 Ac	P < 0.05
R5.3	26.75 Aa	7.50 Bc	17.50 ABb	7.75 Ac	P < 0.05
R5.5	27.25 Aa	9.50 Abc	15.75 Bb	7.50 Ac	P < 0.05
R6	27.75 Aa	11.50 Ac	19.75 Ab	7.75 Ad	P < 0.05
P (T)	0.8422	P < 0.05	P < 0.05	0.1083
Stages	Number of pods (10 plants)
Stages	Control	Thiamethoxam + λ-cyhalothrin	Acetamiprid + α-cypermethrin	Dinotefuran + α-cypermethrin	P (S)
V6/V8	448.25 Ab	675.50 Aa	628.50 Aa	667.50 Aa	P < 0.05
R1	494.50 Ac	686.75 Aab	650.25 Ab	729.75 Aa	P < 0.05
R4	481.50 Ab	667.25 Aa	503.50 Bb	725.50 Aa	P < 0.05
R5.3	477.00 Aa	482.25 Ba	492.00 Ba	483.75 Ba	P = 0.9714
R5.5	480.50 Aa	481.00 Ba	465.75 Ba	480.75 Ba	P = 0.9514
R6	466.00 Aa	448.00 Ba	473.00 Ba	465.75 Ba	P = 0.8743
P (T)	0.7685	P < 0.05	P < 0.05	P < 0.05
Stages	Percentage of damaged seeds (%)
Stages	Control	Thiamethoxam + λ-cyhalothrin	Acetamiprid + α-cypermethrin	Dinotefuran + α-cypermethrin	P (S)
1 - V6/V8	71.25 Aa	25.20 Cc	31.80 Cb	23.40 BCc	P < 0.05
2 - R1	72.78 Aa	29.40 Bc	33.33 Cb	22.68 Cd	P < 0.05
3 - R4	72.05 Aa	30.33 Bc	45.80 Bb	25.68 Bd	P < 0.05
4 - R5.3	72.05 Aa	73.25 Aa	72.28 Aa	69.65 Aa	P = 0.0508
5 - R5.5	72.50 Aa	70.80 Aa	72.65 Aa	69.48 Aa	P = 0.0553
6 - R6	67.63 Bb	71.58 Aa	70.35 Aa	71.68 Aa	P < 0.05
P (T)	P < 0.05	P < 0.05	P < 0.05	P < 0.05
Stages	Yield (kg·ha^-1)
Stages	Control	Thiamethoxam + λ-cyhalothrin	Acetamiprid + α-cypermethrin	Dinotefuran + α-cypermethrin	P (S)
V6/V8	2367.33 Ac	3689.28 Aab	3411.20 Ab	3870.93 Aa	P < 0.05
R1	2336.08 Ad	3250.58 Bb	2827.40 Bc	3848.75 Aa	P < 0.05
R4	2304.58 Ad	3298.80 Bb	2850.33 Bc	3762.53 Aa	P < 0.05
R5.3	2402.35 Ac	3014.23 BCb	2492.83 Cc	3358.75 Ba	P < 0.05
R5.5	2290.90 Ab	2876.43 Ca	2477.38 Cb	2881.25 Ca	P < 0.05
R6	2251.88 Aa	2236.25 Da	1883.23 Db	2329.20 Da	P < 0.05
P (T)	0.9357	P < 0.05	P < 0.05	P < 0.05

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[1] *Corresponding author: andre.almeida@ifgoiano.edu.br