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Figure 1:
Gall and egg formation of Meloidogyne javanica (A and B), M. incognita race 3 (C and D), and M. arenaria race 1 (E and F) on cultivars of oilseed radish, white (Tachiibuki) and black (Pratex) oats under greenhouse conditions. Tomato cv. Rutgers was used as a susceptible host. Gall severity was assessed based on a scale 0 to 5 where 0 = no galls, and 5 ≥ 100 galls on roots. Data are the mean of two trials with ten replicates. Bars with the same letter(s) are not significantly different based on the Tukey’s test.
Figure 2:
Representative images of roots of oilseed radish cv. Eco-Till (A) and oat cv. Pratex (B) infected with Meloidogyne arenaria at 28 days after inoculation.
Figure 3:
Hematoxylin-Eosin stained cross sections of root tissues of oilseed radish cv. Carwoodi (A) and Eco-Till (B) infected with Meloidogyne incognita at 28 days after inoculation. N, female nematode; GC, giant cell.
Figure 4:
Cross sections of root tissues of oat cv. Pratex (A) and Tachiibuki (B) infected with Meloidogyne javanica at 28 days after inoculation. N, female nematode; GC, giant cell.
Number of second-stage juveniles (J2), and young and adult (egg-laying) females of Meloidogyne spp. in roots of oilseed radish (Eco-Till, susceptible; Carwoodi, resistance) at early-stage of infection (1, 3, and 5 days after inoculation; DAI) and at 28 DAI in the greenhouse.
J2
J2
J2
Young female
Adult female
Nematode/Cultivar
1 DAI
3 DAI
5 DAI
28 DAI
28 DAI
M. javanica
Eco-Till
8.5 a
19.7 a
30.6 a
20.7 a
17.6 a
Carwoodi
2.7 a
12.3 a
27.0 a
6.6 b
4.2 b
M. incognita race 3
Eco-Till
7.0 a
19.6 a
31.3 a
12.0 a
9.6 a
Carwoodi
3.1 a
12.3 a
27.1 a
3.6 b
1.6 b
M. arenaria race 1
Eco-Till
7.5 a
16.3 a
28.0 a
10.3 a
18.0 a
Carwoodi
5.0 a
21.6 a
23.6 a
3.0 b
1.8 b
Reproduction of Meloidogyne javanica, M. incognita race 3, and M. arenaria race 1 on oilseed radish, white (Tachiibuki) and black (Pratex) oats under greenhouse conditions.
M. javanica
M. incognita race 3
M. arenaria race 1
Cultivar
Rfy
Host statusz
Rf
Host status
Rf
Host status
Tomatox
24.0 a
Good
11.1 a
Good
16.5 a
Good
Cannavaro
22.1 a
Good
2.7 cde
Good
3.1 c
Good
Final
22.0 a
Good
2.5 bc
Good
10.2 b
Good
Control
11.0 b
Good
0.3 e
Poor
1.7 c
Maintenance
Image
8.2 bc
Good
7.7 ab
Good
8.2 b
Good
Eco-Till
7.7 bc
Good
3.5 cde
Good
12.5 ab
Good
Pratex
7.1 bc
Good
3.9 cd
Good
9.7 b
Good
Cardinal
4.4 bc
Good
1.2 de
Good
1.9 c
Maintenance
Tachiibuki
3.6 bc
Good
0.2 e
Poor
0.3 c
Poor
Karakter
1.9 bc
Maintenance
1.1 e
Maintenance
0.9 c*
Poor
Concorde
1.8 bc
Maintenance
1.7 de
Maintenance
2.5 c
Good
Carwoodi
1.0 c*
Poor
0.2 e
Poor
0.2 c
Poor
Number of second-stage juveniles (J2), and young and adult (egg-laying) females of Meloidogyne spp. in roots of oat (Pratex, susceptible; Tachiibuki, resistance) cultivars at early-stage of infection (1, 3, and 5 days after inoculation; DAI) and at 28 DAI in the greenhouse.
