Table 6 Allelopathic suppression of diseases and nematodes
Allelopathic source
Application
mode/rate
Pathogen/disease suppression
References
Neem cake
1% (mass/
mass soil)
67–90% decrease in lesion (Pratylenchus
penetrans) number and root-knot
nematodes in the tomato crop
[183]
Neem cake
1% (mass/
mass soil)
23% decrease in nematodes in maize
roots and 70% decrease in root-knot
nematodes in the soil around roots
Rice
Root
exudates
(1.5 mL)
37% decrease in the spore germination of
Fusarium rum f. sp. Niveum
[184]
Rice
Root
exudates
(20 mL)
71.9% decrease in the spore germination
of Fusarium rum f. sp. Niveum
Neem
Leaf water
extract (20%
w/v)
53.22% decrease in the growth of
Fusarium solani f. sp. Melongenae
[185]
Sweetworm wood
(Artemisia annua)
Leaf water
extract (20%
w/v)
42.2% decrease in the growth of
Fusarium solani f. sp. Melongenae
Neem cake
3% (w/w)
61.03% decrease in the number of female
root-knot nematode (Meloidogyne
javanica) in roots
[176]
Barley + potato
Grown in
rotation
55.1% decrease in the inoculum intensity
of Rhizoctonia solani (JG Kühn)
[186]
Rice
Root
exudates
(20 L)
71.88% decrease in the spore production
of Fusarium oxysporum f. sp. Niveum
[184]
Eucalyptus
Leaf water
extract (20%
w/v)
46.76% decrease in the growth of
Fusarium solani f. sp. Melongenae
[185]
Neem cake
3% (w/w)
63.7% decrease in egg masses of rootknot nematodes in roots
[176]
Neem leaves
3% (w/w)
38.3% decrease in the number of female
root-knot nematode in roots
[176]
Indian mustard
(Brassica juncea L.)
+ potato
Grown in
rotation
45.5% decrease in the inoculum intensity
of Rhizoctonia solani (JG Kühn)
[186]
Neem leaves
3% (w/w)
60.34% decrease in the egg masses of
root-knot nematodes in the roots
[176]
Rhubarb (Rheum
emodi L.)
Leaf water
extract (20%
w/v)
37.2% decrease in the growth of
Fusarium solani f. sp. Melongenae
[185]
Tulsi (Ocimum
sanctum Linn)
Leaf water
extract (20%
w/v)
44% decrease in the growth of Fusarium
solani f. sp. Melongenae
Turnip (Brassica
rapa L.) + potato
Grown in
rotation
56.2% decrease in the inoculum intensity
of Rhizoctonia solani (JG Kühn)
[186]
23 Ecological Management of Agricultural Pests Through Allelopathy
565
Allelopathic source
Application
mode/rate
Pathogen/disease suppression
References
Neem cake
1% (mass/
mass soil)
67–90% decrease in lesion (Pratylenchus
penetrans) number and root-knot
nematodes in the tomato crop
[183]
Neem cake
1% (mass/
mass soil)
23% decrease in nematodes in maize
roots and 70% decrease in root-knot
nematodes in the soil around roots
Rice
Root
exudates
(1.5 mL)
37% decrease in the spore germination of
Fusarium rum f. sp. Niveum
[184]
Rice
Root
exudates
(20 mL)
71.9% decrease in the spore germination
of Fusarium rum f. sp. Niveum
Neem
Leaf water
extract (20%
w/v)
53.22% decrease in the growth of
Fusarium solani f. sp. Melongenae
[185]
Sweetworm wood
(Artemisia annua)
Leaf water
extract (20%
w/v)
42.2% decrease in the growth of
Fusarium solani f. sp. Melongenae
Neem cake
3% (w/w)
61.03% decrease in the number of female
root-knot nematode (Meloidogyne
javanica) in roots
[176]
Barley + potato
Grown in
rotation
55.1% decrease in the inoculum intensity
of Rhizoctonia solani (JG Kühn)
[186]
Rice
Root
exudates
(20 L)
71.88% decrease in the spore production
of Fusarium oxysporum f. sp. Niveum
[184]
Eucalyptus
Leaf water
extract (20%
w/v)
46.76% decrease in the growth of
Fusarium solani f. sp. Melongenae
[185]
Neem cake
3% (w/w)
63.7% decrease in egg masses of rootknot nematodes in roots
[176]
Neem leaves
3% (w/w)
38.3% decrease in the number of female
root-knot nematode in roots
[176]
Indian mustard
(Brassica juncea L.)
+ potato
Grown in
rotation
45.5% decrease in the inoculum intensity
of Rhizoctonia solani (JG Kühn)
[186]
Neem leaves
3% (w/w)
60.34% decrease in the egg masses of
root-knot nematodes in the roots
[176]
Rhubarb (Rheum
emodi L.)
Leaf water
extract (20%
w/v)
37.2% decrease in the growth of
Fusarium solani f. sp. Melongenae
[185]
Tulsi (Ocimum
sanctum Linn)
Leaf water
extract (20%
w/v)
44% decrease in the growth of Fusarium
solani f. sp. Melongenae
Turnip (Brassica
rapa L.) + potato
Grown in
rotation
56.2% decrease in the inoculum intensity
of Rhizoctonia solani (JG Kühn)
[186]
23 Ecological Management of Agricultural Pests Through Allelopathy
565