Abstract
AbstractDeficit irrigation has been widely investigated as a valuable strategy for dry regions where water is the limiting factor in crop cultivation. Soil moisture can be one of the important factors that influence root-knot nematode (RKN) disease development. To determine how different levels of irrigation can affect disease development, irrigation regimes ranging from 20% to full field capacity (FC) were applied to tomato and eggplant plants inoculated with Meloidogyne javanica (M. javanica) under controlled conditions. In addition, in vitro bioassays were done to evaluate the effect of water potential and soil moisture content on M. javanica viability in the soil and reproduction on plant hosts. The relative egg hatching percentage decreased significantly with decreasing water potential from –0.1 to –1 MPa. The use of 80% irrigation level caused minor reductions in growth but significantly reduced nematode infection load. Nematode infection was reduced even further at lower levels of irrigation, however this also led to marked reductions in fresh and dry weights of the tomato and eggplants. Therefore, deficit irrigation could be used at a rate of 80% or 60% of FC to increase water use efficiency and reduce the level of RKN (M. javanica) infection without greatly reducing the growth performance of tomato and eggplant crops.Keywords: deficit irrigationmanagementwater potentialwater use efficiency FundingThis work is a part of research project financially supported by Scientific Research Support Fund of Jordan-Ministry of Higher Education and Scientific Research in a co-ordination with the Scientific Research Deanship of Mutah University, Karak, Jordan.
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Claims 6
Claim · model-written summary
Lower water potential significantly reduced nematode egg hatching.
- Taxon
- tomato and eggplant
Solanum lycopersicum
Solanum melongenae1 - Treatment
- decreasing water potential from –0.1 to –1 MPae0
- Interactor
- Meloidogyne javanicaMeloidogyne javanicae1pathogen
- Outcome
- relative egg hatching percentagee0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The relative egg hatching percentage decreased significantly with decreasing water potential from –0.1 to –1 MPa”
e1“tomato and eggplant plants inoculated with Meloidogyne javanica (M. javanica)”
Claim · model-written summary
Irrigation at 80% caused minor growth reductions.
- Taxon
- tomato and eggplantSolanum lycopersicumSolanum melongenae1
- Treatment
- 80% irrigation levele0
- Outcome
- growthe0
- Direction
- reductionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The use of 80% irrigation level caused minor reductions in growth”
e1“tomato and eggplant plants”
Claim · model-written summary
Irrigation at 80% significantly reduced nematode infection load.
- Taxon
- tomato and eggplantSolanum lycopersicumSolanum melongenae1
- Treatment
- 80% irrigation levele0
- Interactor
- Meloidogyne javanicaMeloidogyne javanicae1pathogen
- Outcome
- nematode infection loade0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The use of 80% irrigation level caused minor reductions in growth but significantly reduced nematode infection load”
e1“tomato and eggplant plants inoculated with Meloidogyne javanica (M. javanica)”
Claim · model-written summary
Lower irrigation levels reduced nematode infection further.
- Taxon
- tomato and eggplantSolanum lycopersicumSolanum melongenae1
- Treatment
- lower levels of irrigatione0
- Interactor
- Meloidogyne javanicaMeloidogyne javanicae1pathogen
- Outcome
- Nematode infectione0
- Direction
- reduced even furthere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nematode infection was reduced even further at lower levels of irrigation”
e1“tomato and eggplant plants inoculated with Meloidogyne javanica (M. javanica)”
Claim · model-written summary
Lower irrigation markedly reduced plant fresh weight.
- Taxon
- tomato and eggplantsSolanum lycopersicumSolanum melongenae0
- Treatment
- lower levels of irrigatione0
- Outcome
- fresh and dry weightse0
- Direction
- reductionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lower levels of irrigation, however this also led to marked reductions in fresh and dry weights of the tomato and eggplants”
Claim · model-written summary
The authors proposed 80% or 60% field capacity deficit irrigation to improve water use efficiency while limiting infection and growth loss.
- Taxon
- tomato and eggplantSolanum lycopersicumSolanum melongenae0
- Interactor
- M. javanicaMeloidogyne javanicae0pathogen
- Outcome
- deficit irrigation could be used at a rate of 80% or 60% of FCe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“deficit irrigation could be used at a rate of 80% or 60% of FC to increase water use efficiency and reduce the level of RKN (M. javanica) infection without greatly reducing the growth performance of tomato and eggplant crops”
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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.