| Rates/ ml Treatments |
No. of galls* |
RGI** |
No. of eggmasses |
EI** |
No.of eggs/ eggmass |
Nematode population in Soil |
Females population in Root |
Final population (Pf) |
Rf *** |
| Clayey soil |
| Bio-arc |
5 |
32.0b |
4.0 |
22.3b |
3.0 |
1009.95b |
584.5b |
34.5b |
23141.4 |
11.6 |
| 10 |
29.8b |
3.0 |
20.8b |
3.0 |
874.95c |
439.5c |
33.5b |
18672.5 |
9.3 |
| 15 |
20.5c |
3.0 |
17.5c |
3.0 |
689.95d |
399.5d |
22.5c |
12496.4 |
6.2 |
| 20 |
20.0cd |
3.0 |
14.5cd |
3.0 |
587.45e |
388.5e |
21.3cd |
8927.8 |
4.5 |
| Nemastrol |
0.25 |
13.8e |
3.0 |
11.3e |
3.0 |
312.45j |
299.5k |
15.8e |
3846.0 |
1.9 |
| Bio-arc +Nemastrol |
5+ 0.25 |
19.3cd |
3.0 |
14.3cd |
3.0 |
489.95f |
372.5f |
20.5cd |
7399.3 |
3.7 |
| 10+ 0.25 |
18.0c-e |
3.0 |
13.0de |
3.0 |
417.45g |
361.2g |
19.5c-e |
5807.6 |
2.9 |
| 15+0.25 |
16.0de |
3.0 |
11.8de |
3.0 |
392.45h |
359.5h |
18.3c-e |
5008.7 |
2.5 |
| 20+0.25 |
15.8de |
3.0 |
11.3e |
3.0 |
349.95i |
337.5i |
17.5de |
4309.4 |
2.2 |
| Oxamyl |
|
7.3f |
2.0 |
10.0f |
2.0 |
249.95k |
300.5j |
10.3f |
2810.3 |
1.4 |
| N alone |
|
53.5a |
4.0 |
43.8a |
4.0 |
1339.95a |
1399.5a |
54.8a |
60145.6 |
30.0 |
| Sandy soil |
| Bio-arc |
5 |
41.5b |
4.0 |
33.3b |
4.0 |
1074.95b |
1443.8ab |
45.5b |
37285.9 |
18.6 |
| 10 |
41.3b |
4.0 |
30.5c |
3.0 |
964.95c |
1000.5a-c |
44.0b |
30476.0 |
15.2 |
| |
15 |
17.3d |
4.0 |
30.3c |
3.0 |
862.45d |
810.0bc |
37.0c |
26979.7 |
13.5 |
| 20 |
24.8d |
3.0 |
22.5d |
3.0 |
736.25e |
507.6bc |
26.3d |
17099.5 |
8.5 |
| Nemastrol |
0.25 |
14.3fg |
3.0 |
11.5fg |
3.0 |
351.25j |
279.5c |
15.0f |
4333.9 |
2.2 |
| Bio-arc +Nemastrol |
5 +0.25 |
23.8d |
3.0 |
22.3d |
3.0 |
574.95f |
400.5c |
24.8de |
13246.7 |
6.6 |
| 10+0.25 |
18.5e |
3.0 |
14.5e |
3.0 |
509.95g |
384.5c |
21.8de |
7800.6 |
3.9 |
| 15+0.25 |
18.3ef |
3.0 |
12.8ef |
3.0 |
449.95h |
362.5c |
21.3e |
6143.2 |
3.0 |
| 20+0.25 |
16.3ef |
3.0 |
11.8ef |
3.0 |
417.45i |
347.5c |
21.0e |
5294.4 |
2.6 |
| Oxamyl |
11.5g |
3.0 |
11.0g |
3.0 |
117.45k |
360.5j |
12.5f |
1665.0 |
0.8 |
| N alone |
58.5a |
4.0 |
50.5a |
4.0 |
1379.95a |
2069.5a |
61.0a |
71819.8 |
35.9 |
|
| *Each value presented the mean of four replicates N = M. incognita (2000 eggs/ plant ) . Means in each column followed by the same letter(s) did not differ at P ± 0.05
according to Duncan`s multiple range test. * * Root gall index (RGI) or egg masses index (EI) was determined according to the scale given by Taylor and Sasser as
follows : 0= no galls or egg masses, 1= 1-2 galls or egg masses , 2= 3-10 galls of egg masses, 3= 11-30 galls or egg masses, 4= 31-100 galls or egg masses and 5=
more than 100 galls or egg masses ** Reproudction factor ( Rf) = No. of eggs per root + Nematode population in soil + No. of developmental stages + No. of females/
No. of eggs inocula |
| Table 2: Impact of Bio-arc and Nemastrol (a mixture of active ingredients) singly and concomitantly on the development and reproduction of M. incognita infecting sugarbeet var. Negma grown in two soil types under greenhouse conditions at 27 ± 3°C. |
