Abstract
Onion maggot (Delia antiqua) is a prominent pest of allium crops in temperate zones worldwide. Management of this pest relies on prophylactic insecticide applications at planting that target the first generation. Because effective options are limited, growers are interested in novel tactics such as deployment of entomopathogenic nematodes. We surveyed muck soils where onions are typically grown to determine if entomopathogenic nematode species were present, and then evaluated the compatibility of entomopathogenic nematode species with the insecticides commonly used to manage D. antiqua. We also evaluated the efficacy of these entomopathogenic nematodes for reducing D. antiqua infestations in the field. No endemic entomopathogenic nematodes were detected in surveys of muck fields in New York. Compatibility assays indicated that, although insecticides such as spinosad and, to some extent, cyromazine did cause mortality of entomopathogenic nematodes, these insecticides did not affect infectivity of the entomopathogenic nematodes. Field trials indicated that applications of entomopathogenic nematodes can reduce the percentage of onion plants killed by D. antiqua from 6% to 30%. Entomopathogenic nematodes reduced D. antiqua damage and increased end of season yield over two field seasons. Applications of entomopathogenic nematodes may be a viable option for reducing D. antiqua populations in conventional and organic systems. Together with other management tactics, like insecticide seed treatments, applications of entomopathogenic nematodes can provide a yield boost and a commercially acceptable level of D. antiqua control.
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Claims 9
Claim · model-written summary
No endemic entomopathogenic nematodes were detected in New York muck fields.
- Taxon
- Onion
Allium cepat0 - Outcome
- No endemic entomopathogenic nematodes were detectede0
- Setting
- muck fields in New Yorke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No endemic entomopathogenic nematodes were detected in surveys of muck fields in New York.”
t0“Onion”
Claim · model-written summary
Spinosad caused nematode mortality.
- Taxon
- OnionAllium cepat0
- Treatment
- spinosade0
- Outcome
- mortality of entomopathogenic nematodese0
- Direction
- causee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“insecticides such as spinosad and, to some extent, cyromazine did cause mortality of entomopathogenic nematodes”
t0“Onion”
Claim · model-written summary
Cyromazine caused some nematode mortality.
- Taxon
- OnionAllium cepat0
- Treatment
- cyromazinee0
- Outcome
- mortality of entomopathogenic nematodese0
- Direction
- causee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“insecticides such as spinosad and, to some extent, cyromazine did cause mortality of entomopathogenic nematodes”
t0“Onion”
Claim · model-written summary
These insecticides did not affect nematode infectivity.
- Taxon
- OnionAllium cepat0
- Treatment
- these insecticidese0
- Outcome
- infectivity of the entomopathogenic nematodese0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“these insecticides did not affect infectivity of the entomopathogenic nematodes”
t0“Onion”
Claim · model-written summary
Nematodes reduced onion plant mortality from D. antiqua by 6% to 30%.
- Taxon
- onionAllium cepae0
- Treatment
- applications of entomopathogenic nematodese0
- Interactor
- D. antiqua
Delia antiquae0pest - Outcome
- percentage of onion plants killed by D. antiquae0
- Direction
- reducee0
- Value
- 6% to 30%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“applications of entomopathogenic nematodes can reduce the percentage of onion plants killed by D. antiqua from 6% to 30%”
Claim · model-written summary
Nematodes reduced D. antiqua damage over two field seasons.
- Taxon
- OnionAllium cepat0
- Treatment
- Entomopathogenic nematodese0
- Interactor
- D. antiquaDelia antiquae0pest
- Outcome
- D. antiqua damagee0
- Direction
- reducede0
- Qualifier
- over two field seasonse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Entomopathogenic nematodes reduced D. antiqua damage and increased end of season yield over two field seasons.”
t0“Onion”
Claim · model-written summary
Nematodes increased end of season yield over two field seasons.
- Taxon
- OnionAllium cepat0
- Treatment
- Entomopathogenic nematodese0
- Outcome
- end of season yielde0
- Direction
- increasede0
- Qualifier
- over two field seasonse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Entomopathogenic nematodes reduced D. antiqua damage and increased end of season yield over two field seasons.”
t0“Onion”
Claim · model-written summary
The authors consider nematode application viable for D. antiqua reduction in conventional and organic systems.
- Taxon
- OnionAllium cepat0
- Interactor
- D. antiquaDelia antiquae0pest
- Outcome
- Applications of entomopathogenic nematodes may be a viable option for reducing D. antiqua populationse0
- Qualifier
- conventional and organic systemse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Applications of entomopathogenic nematodes may be a viable option for reducing D. antiqua populations in conventional and organic systems.”
t0“Onion”
Claim · model-written summary
The authors conclude nematodes alongside other management tactics can boost yield and provide acceptable control.
- Taxon
- OnionAllium cepat0
- Interactor
- D. antiquaDelia antiquae0pest
- Outcome
- yield boost and a commercially acceptable level of D. antiqua controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Together with other management tactics, like insecticide seed treatments, applications of entomopathogenic nematodes can provide a yield boost and a commercially acceptable level of D. antiqua control.”
t0“Onion”
The same questions in other papers
spinosad · pest · Allium cepa (onion)Positive and negative results
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11 papers in the same direction as this paper · 1 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- no effect
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See all 14 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.