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Compatibility of fluazaindolizine and oxamyl with Pasteuria penetrans on spore attachment to juveniles of Meloidogyne javanica and M. incognita

Eleni Nasiou
Eleni Nasiou
, 
Tim Thoden
Tim Thoden
, 
Iro V. Pardavella
Iro V. Pardavella
 and 
Emmanuel A. Tzortzakakis
Emmanuel A. Tzortzakakis
   | Jul 21, 2020
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Published Online: Jul 21, 2020
Page range: 1 - 7
DOI: https://doi.org/10.21307/jofnem-2020-070
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© 2020 Eleni Nasiou et al., published by Sciendo
This work is licensed under the Creative Commons Attribution 4.0 International License.

Average number of spores per juvenile of Meloidogyne incognita and M. javanica exposed to spores of Pasteuria penetrans (Pp) which had been previously incubated for 1, 7, and 21 days in the nematicides fluazaindolizine and oxamyl.

Pp 3 Pp blend
Incubation period
Treatments 1 day 7 days 21 days 1 day 7 days 21 days
Experiment 4
 M. incognita
  Control (Pp untreated) 1.26 c 1.64 b 3.46 b 0.78 c 2.86 a 0.32 b
  Fluazaindolizine 50 ppm 2.84 b 1.50 b 3.36 b 0.98 bc 2.42 a 1.06 a
  Fluazaindolizine 250 ppm 4.28 a 2.48 a 4.08 b 1.28 ab 2.20 a 1.08 a
  Oxamyl 50 ppm 4.68 a 2.76 a 5.02 a 1.33 a 2.38 a 0.94 a
  Spores/dish (× 103) 20 20 20 10 15 20
  J2/dish 320 550 550 1,000 170 1,150
  Incubation period 24 h 24 h 24 h 48 h 48 h 48 h
Experiment 5
 M. javanica
  Control (Pp untreated) 4.54 b
  Fluazaindolizine 50 ppm 5.28 b
  Fluazaindolizine 250 ppm 4.66 b
  Oxamyl 50 ppm 7.70 a
  Spores/dish (× 103) 15
  J2/dish 550
  Incubation period 24 h
Experiment 6
 M. javanica
  Control (Pp untreated) 2.58 c 4.16 b 3.56 c 3.88 b 3.58 c 2.34 c
  Fluazaindolizine 50 ppm 3.60 b 3.96 b 4.38 b 4.02 b 4.82 b 2.96 b
  Fluazaindolizine 250 ppm 4.02 ab 3.78 b 4.74 b 4.10 b 5.16 ab 3.00 b
  Oxamyl 50 ppm 4.30 a 4.80 a 5.42 a 5.90 a 5.86 a 4.46 a
  Spores/dish (× 103) 20 20 20 10 6 8
  J2/dish 1,000 1,000 700 350 300 400
  Incubation period 48 h 48 h 48 h 48 h 48 h 48 h

Average number of spores per juvenile of Meloidogyne javanica (M.j.) and M. incognita (M.i.) exposed to spores of Pasteuria penetrans (Pp blend) which had been previously incubated for 1, 7, and 21 days in the nematicides fluazaindolizine and oxamyl.

Experiment 1 Experiment 2 Experiment 3
Treatments M.j. M.i. M.j. M.i. M.j.
Control (Pp untreated) 3.88 bc 6.22 cd 3.42 e 1.86 cd 15.50 ab
Fluazaindolizine 5 ppm
1 day 3.46 c 8.72 ab 6.04 cde 1.14 cd 14.60 abc
7 days 5.20 abc 8.72 ab 7.56 bcd 1.86 cd 17.92 a
21 days 4.26 bc 7.52 bcd 12.70 a 1.90 cd 15.92 ab
Fluazaindolizine 50 ppm
1 day 7.06 a 10.04 a 3.68 e 1.02 d 17.96 a
7 days 4.90 bc 7.72 bcd 6.58 bcde 1.68 cd 11.70 c
21 days 5.74 ab 7.88 bcd 9.76 abc 3.64 b 16.22 ab
Fluazaindolizine 250 ppm
1 day 15.32 abc
7 days 14.66 abc
21 days 13.64 bc
Oxamyl 25 ppm
1 day 4.94 bc 6.16 d 3.72 e 1.40 cd
7 days 4.18 bc 6.40 cd 4.78 de 2.32 c
21 days 5.42 abc 8.04 bc 10.04 ab 6.14 a
Spores/dish (× 103) 20 20 20 20 15
J2/dish 180 180 300 550 100
Incubation period 24 h 24 h 48 h 48 h 24 h

Number of egg masses per gram of root of tomato plants infected with juveniles of Meloidogyne incognita and M. javanica pre-exposed to spores of Pasteuria penetrans (Pp 3).

Pp 3
Incubation period
Treatments 7 days 21 days
Experiment 4
 M. incognita
  Control without Pp 55.50 a 49.60 a
  Pp untreated 10.50 b 42.60 ab
  Fluazaindolizine 50 ppm 19.90 b 19.10 c
  Fluazaindolizine 250 ppm 3.50 b 31.40 abc
  Oxamyl 50 ppm 20.70 b 24.90 bc
Experiment 6
 M. javanica
  Control without Pp 103.43 a 86.89 a
  Pp untreated 62.70 ab 72.55 ab
  Fluazaindolizine 50 ppm 59.40 ab 57.31 bc
  Fluazaindolizine 250 ppm 47.29 b 48.23 c
  Oxamyl 50 ppm 79.56 ab 59.65 bc
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