Abstract
'!he disastrous effects of nematodes on the productivity of crop plants are often not reoognized but they can be daronstrated urr:Jer different farming systans, soU am climatic conditions by the use of nematicides. For exartt>le, ~ types of positive' yield responses te OOCP (nanaticide) have been cbse1:ved with : (1) soybeans (infected by Pratylenchus BefaenBiB and AphaBmaBtylenchuB BtrotuPatuB) and groundnuts ( infected by A. BtroturotuB am Scutellonema caveneBBi),aro (2) ground:nuts affected by cll.Jlil disease caused by a vi.rus transmitted by a fungus sensitive te the nanaticide. DBCP treat:rœnt of a groundnuts chlorosis thought te be due te neroatodes had, h<J'<ileWer, no effect on the disease or yields aro it was sub+ + sequently established that the syrrptars were due te K ,Na ,Cl toxicities resulting fran the large anount of ash accunulating on the spots where plant residues were burnt at the tiroe of land preparation. Relatively few nerratological stuclies have been carried out in vast areas of Africa, with its diversity of geogra:Jhical and climatic regions. Many of the studies have been restricted to falIDistic surveys. Investigations of faillla rarely suffice in themselves for the dectection of agricultural probla:JS due te nerratodes. 'Ihis is especially true in the case of cultivated crops in Africa r which are often gr<:JNIl on recently cleare(1, land where nerratoae populations are often very varied and contain new species. High populations of polyphagic r pathogenic nerratodes (viz., Meloidogyne, Rotylenchulus and P~atylenchus spp) and the presence of species specifie te certain crops (viz., Radopholus similis on banana and Tylenchulus semipenet~ans on citrus are almost always associated wi th crop damage. This is not always the case with other species whose pathoger'lici ty is unknown because of their r'='Cent discovenematologist, ORSTOM B.P. 1386, Daka~, Senegal
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Claims 6
Claim · model-written summary
Nematicide treatment produced a positive yield response in soybeans infected by two nematodes.
- Taxon
- soybeans
Glycine maxe0 - Treatment
- OOCP (nanaticide)e0
- Interactor
- Pratylenchus BefaenBiBe0pathogen
- Second interactor
- AphaBmaBtylenchuB BtrotuPatuBe0pathogen
- Outcome
- yield responsese0
- Direction
- positivee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“positive' yield responses te OOCP (nanaticide) have been cbse1:ved with : (1) soybeans (infected by Pratylenchus BefaenBiB and AphaBmaBtylenchuB BtrotuPatuB)”
t0“Nematicide application”
Claim · model-written summary
Nematicide treatment produced a positive yield response in groundnuts infected by two nematodes.
- Taxon
- groundnuts
Arachis hypogaeae0 - Treatment
- OOCP (nanaticide)e1
- Interactor
- A. BtroturotuBe0pathogen
- Second interactor
- Scutellonema caveneBBie0pathogen
- Outcome
- yield responsese1
- Direction
- positivee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“groundnuts ( infected by A. BtroturotuB am Scutellonema caveneBBi)”
e1“positive' yield responses te OOCP (nanaticide) have been cbse1:ved with”
Claim · model-written summary
Nematicide treatment produced a positive yield response in groundnuts affected by a viral disease transmitted by a susceptible fungus.
- Taxon
- ground:nutse0
- Treatment
- OOCP (nanaticide)e1
- Interactor
- vi.ruse0pathogen
- Second interactor
- funguse0pathogen
- Outcome
- yield responsese1
- Direction
- positivee1
Not reportedComparator
Verbatim
e0“ground:nuts affected by cll.Jlil disease caused by a vi.rus transmitted by a fungus sensitive te the nanaticide”
e1“positive' yield responses te OOCP (nanaticide) have been cbse1:ved with”
Claim · model-written summary
DBCP treatment had no effect on the chlorosis or yields of groundnuts.
- Taxon
- groundnutsArachis hypogaeae0
- Treatment
- DBCP treat:rœnte0
- Interactor
- neroatodese0pathogen
- Outcome
- disease or yieldse0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“DBCP treat:rœnt of a groundnuts chlorosis thought te be due te neroatodes had, h<J'<ileWer, no effect on the disease or yields”
Claim · model-written summary
The groundnut chlorosis was subsequently attributed to potassium, sodium and chloride toxicities from ash accumulations.
- Taxon
- groundnutsArachis hypogaeae1
- Outcome
- chlorosise1
- Qualifier
- K ,Na ,Cl toxicities resulting fran the large anount of ash accunulatinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“syrrptars were due te K ,Na ,Cl toxicities resulting fran the large anount of ash accunulating on the spots where plant residues were burnt at the tiroe of land preparation”
e1“groundnuts chlorosis”
Claim · model-written summary
High populations of listed pathogenic nematodes and crop-specific nematodes were almost always associated with crop damage.
- Taxon
- bananae0
- Interactor
- Radopholus similis
Radopholus similise0pathogen - Outcome
- crop damagee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“High populations of polyphagic r pathogenic nerratodes (viz., Meloidogyne, Rotylenchulus and P~atylenchus spp) and the presence of species specifie te certain crops (viz., Radopholus similis on banana and Tylenchulus semipenet~ans on citrus are almost always associated wi th crop damage”
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1 paper more in this group
See all 5 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.