Abstract
Pang, W., S. L. Hafez, P. Sundararaj, B. Shafii, and E. Fallah. 2009. Pathogenicity of Pratylenchus penetrans on onion. Nematropica 39:35-46. Pathogenicity of Pratylenchus penetrans on onion was tested both under greenhouse and microplot conditions. For the greenhouse study, seedlings of onion (Allium cepa) cultivar Tioga were inoculated with P. penetrans at 0, 3000, 6000, 9000, or 1200 females + juveniles/ pot. In field microplots, onions were inoculated 0, 26500, 53000, 106000, or 212000 females + juveniles of P. penetrans/ microplot. Cultural practices recommended by onion production in Idaho were carried out and data on fresh and dry weight of the plant top and roots, bulb diameter and weight, and nematode population in roots and soil were collected at harvest. Increasing inoculum levels led to significant reductions in onion growth and increased nematode population at harvest. Significant reduction in plant growth began at 3000 P. penetrans/ pot or 26500/ microplot. Bulb weight reduction ranged from 31.5% to 64.2% at the inoculum level of 26500 and 212000 P. penetrans / microplot, respectively, in field microplots. Maximum reduction in plant total dry weight was 84.2% at 12000 P. penetrans/ pot under greenhouse conditions. This study will help onion growers in Idaho make decisions on whether or not to grow onions in a field with a specific population density of P. penetrans in the soil.
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Claims 5
Claim · model-written summary
Increasing P. penetrans inoculum significantly reduced onion growth
- Taxon
- onion
Allium cepae0 - Treatment
- Increasing inoculum levelse1
- Interactor
- Pratylenchus penetrans
Pratylenchus penetranse0pathogen - Outcome
- onion growthe1
- Direction
- significant reductionse1
- Setting
- greenhouse and microplot conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pathogenicity of Pratylenchus penetrans on onion was tested both under greenhouse and microplot conditions”
e1“Increasing inoculum levels led to significant reductions in onion growth and increased nematode population at harvest”
Claim · model-written summary
Increasing P. penetrans inoculum increased the nematode population at harvest
- Taxon
- onionAllium cepae0
- Treatment
- Increasing inoculum levelse1
- Interactor
- Pratylenchus penetransPratylenchus penetranse0pathogen
- Outcome
- nematode populatione1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pathogenicity of Pratylenchus penetrans on onion was tested both under greenhouse and microplot conditions”
e1“Increasing inoculum levels led to significant reductions in onion growth and increased nematode population at harvest”
Claim · model-written summary
Significant reduction in onion growth began at 3000 P. penetrans per pot or 26500 per microplot
- Taxon
- onionAllium cepae0
- Treatment
- 3000 P. penetrans/ pote2
- Interactor
- P. penetransPratylenchus penetranse2pathogen
- Outcome
- plant growthe2
- Direction
- Significant reductione2
- Qualifier
- began at 3000 P. penetrans/ pot or 26500/ microplote2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pathogenicity of Pratylenchus penetrans on onion was tested both under greenhouse and microplot conditions”
e2“Significant reduction in plant growth began at 3000 P. penetrans/ pot or 26500/ microplot”
Claim · model-written summary
Bulb weight of onion was reduced by 31.5% to 64.2% at 26500 and 212000 P. penetrans per microplot in field microplots
- Taxon
- onionAllium cepae0
- Treatment
- the inoculum level of 26500 and 212000 P. penetrans / microplote3
- Interactor
- P. penetransPratylenchus penetranse3pathogen
- Outcome
- Bulb weighte3
- Direction
- reductione3
- Value
- 31.5% to 64.2%e3
- Setting
- field microplotse3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pathogenicity of Pratylenchus penetrans on onion was tested both under greenhouse and microplot conditions”
e3“Bulb weight reduction ranged from 31.5% to 64.2% at the inoculum level of 26500 and 212000 P. penetrans / microplot, respectively, in field microplots”
Claim · model-written summary
Maximum reduction of onion total dry weight was 84.2% at 12000 P. penetrans per pot in the greenhouse
- Taxon
- onionAllium cepae0
- Treatment
- 12000 P. penetrans/ pote4
- Interactor
- P. penetransPratylenchus penetranse4pathogen
- Outcome
- plant total dry weighte4
- Direction
- Maximum reductione4
- Value
- 84.2%e4
- Setting
- greenhouse conditionse4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pathogenicity of Pratylenchus penetrans on onion was tested both under greenhouse and microplot conditions”
e4“Maximum reduction in plant total dry weight was 84.2% at 12000 P. penetrans/ pot under greenhouse conditions”
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- positive
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See all 93 papers →inoculation · Pratylenchus penetrans · Allium cepa (onion)Results agree
1 paper in the same direction as this paper
- negative
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.