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Nematicidal Activity of Fosthiazate Against Soybean Cyst Nematode Heterodera glycines

Hai Yan Wu
Hai Yan Wu
, 
Man Luo
Man Luo
, 
Lu Yuan Zhang
Lu Yuan Zhang
 und 
Xun Bo Zhou
Xun Bo Zhou
   | 23. Apr. 2019
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Article Category: Arts & Humanities
Online veröffentlicht: 23. Apr. 2019
Seitenbereich: 1 - 9
Eingereicht: 22. Okt. 2018
DOI: https://doi.org/10.21307/jofnem-2019-021
© 2019 Hai Yan Wu et al., published by Sciendo
This work is licensed under the Creative Commons Attribution 4.0 International License.

Figure 1

Mortality rate (%) of H. glycines J2 exposure to fosthiazate with exposure time.
Mortality rate (%) of H. glycines J2 exposure to fosthiazate with exposure time.

Figure 2

The shape of H. glycines J2. (A, B) normal shape of J2; (B) natural shape of normal dead J2; (C, D) the shape of dead J2 killed by fosthiazate. Bar: A, C:100 µm, B, D:50 µm.
The shape of H. glycines J2. (A, B) normal shape of J2; (B) natural shape of normal dead J2; (C, D) the shape of dead J2 killed by fosthiazate. Bar: A, C:100 µm, B, D:50 µm.

Figure 3

Cumulative hatching percentage of H. glycines free eggs exposure to fosthiazate with exposure time. The error bars in the picture referred to standard error.
Cumulative hatching percentage of H. glycines free eggs exposure to fosthiazate with exposure time. The error bars in the picture referred to standard error.

Effect of fosthiazate on control of H. glycines in the pot experiment.

Treatment Amount of fosthiazate (a.i.) (mg) Average number of cyst Population decrease (%)
Water 0 412 a
0.5% DMSO 0 432 a
2.18 mg/l 0.0044 389 ab 5.43
5.45 mg/l 0.0109 232 bc 43.64
13.62 mg/l 0.0272 194 c 53.00
34.04 mg/l 0.0681 135 cd 67.21
85.10 mg/l 0.1702 9 d 97.94

Mortality rate (%) of H. glycines J2 at different durations after exposure to different concentrations of fosthiazate.

Exposure time (hr)
Concentration (mg/l) 2 4 6 8 10 12
13.62 2.86 ± 0.74 a 9.80 ± 1.15 a 19.48 ± 2.29 a 32.96 ± 3.81 a 73.04 ± 2.52 a 86.35 ± 1.33 a
8.61 1.97 ± 0.86 ab 7.96 ± 0.85 a 13.54 ± 0.48 b 26.32 ± 2.04 b 67.23 ± 3.14 b 79.77 ± 2.72 b
5.45 1.55 ± 0.61 abc 5.07 ± 0.90 b 10.90 ± 0.86 bc 22.64 ± 1.22 b 39.15 ± 1.68 c 66.82 ± 3.26 c
3.44 2.24 ± 0.70 ab 5.17 ± 0.99 b 8.10 ± 1.16 cd 11.18 ± 1.62 c 21.35 ± 1.88 d 48.39 ± 1.93 d
2.18 0.89 ± 0.60 bc 4.29 ± 1.20 bc 6.41 ± 0.98 d 6.41 ± 0.98 cd 10.01 ± 0.65 e 13.43 ± 0.57 e
0.5% DMSO 0.52 ± 0.52 bc 1.93 ± 1.00 cd 1.90 ± 0.73 e 2.27 ± 0.68 de 2.27 ± 0.68 f 3.23 ± 0.80 f
Water 0.00 ± 0.00 c 0.00 ± 0.00 d 0.00 ± 0.00 e 0.00 ± 0.00 e 0.00 ± 0.00 f 0.00 ± 0.00 f

Toxicity of fosthiazate to H. glycines J2 at different treatment exposure time.

Exposure time (h) Slope(±SE) Correlation coefficient LC50 (95%CI) LC90 (95%CI)
4 0.54 (± 0.10) 0.95 3912.59 (317.10−48275.85) 941773.86 (9,541.28−92957,985.01)
8 1.38 (± 0.18) 0.98 25.00 (16.53−37.80) 212.43 (83.90−537.87)
12 2.65 (± 0.44) 0.97 4.41 (3.53−5.50) 13.41 (9.36−19.20 )

Lengths of H. glycines J2 at 60 h after replaced fosthiazate with distilled water

Length (µm)
Treatment Stylet Esophageal glands to head Hyaline region Entire body
Fosthiazate 24.16 ± 0.41 b 155.11 ± 3.74 b 57.98 ± 1.13 a 371.77 ± 10.97 b
Water 25.77 ± 0.33 a 199.48 ± 2.03 a 27.99 ± 0.59 b 501.04 ± 8.44 a
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