Abstract
Meloidogyne enterolobii is an emerging global threat and is damaging to sweetpotato (Ipomoea batatas) production in the southeast United States. Nematicide application is one of the few management strategies currently available against this nematode, and field testing is urgently needed. The objective of this study was to assess common nematicides for management of M. enterolobii and nontarget effects on free-living nematodes in sweetpotato field production. Treatments were (i) untreated control, (ii) fumigation using 1,3-dichloropropene, or at-transplant drench of fluorinated nematicides (iii) fluazaindolizine, (iv) fluopyram, or (v, vi) fluensulfone at 2 or 4 kg a.i./ha. In 2022, a field trial was conducted under severe M. enterolobii pressure and was repeated in 2023 in the same location without treatment rerandomization. Fumigation using 1,3-dichloropropene (1,3-D) was the only consistently effective nematicide at improving marketable yield relative to control and also consistently reduced most storage root galling measurements and midseason Meloidogyne soil abundances. Fluensulfone at 4 kg a.i./ha consistently improved total yield but not marketable yield, whereas fluensulfone at 2 kg a.i./ha, fluazaindolizine, and fluopyram did not improve yield. Each fluorinated nematicide treatment reduced at least one nematode symptom or nematode soil abundances relative to control, but none provided consistent benefits across years. Even with 1,3-D fumigation, yield was poor, and none of the nematicide treatments provided a significant return on investment relative to forgoing nematicide application. There were minimal effects on free-living nematodes. In summary, 1,3-D is an effective nematicide for M. enterolobii management, but additional management will be needed under severe M. enterolobii pressure.
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Claims 12
Claim · model-written summary
Fumigation with 1,3-dichloropropene was the only nematicide that consistently improved marketable yield of sweetpotato relative to the untreated control.
- Taxon
- Sweetpotato
_Flower.jpg?width=60)
Ipomoea batatast0 - Treatment
- Fumigation using 1,3-dichloropropenee0
- Outcome
- marketable yielde0
- Direction
- improvinge0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Flower.jpg?width=500)
Verbatim
t0“Sweetpotato”
e0“Fumigation using 1,3-dichloropropene (1,3-D) was the only consistently effective nematicide at improving marketable yield relative to control”
Claim · model-written summary
Fumigation with 1,3-dichloropropene consistently reduced most storage root galling measurements and midseason Meloidogyne soil abundances relative to control in sweetpotato.
- Taxon
- SweetpotatoIpomoea batatast0
- Treatment
- Fumigation using 1,3-dichloropropenee0
- Interactor
- Meloidogyne
_penetrates_a_tomato_root_-_USDA-ARS.jpg?width=60)
Meloidogynee0pest - Outcome
- storage root galling measurements and midseason Meloidogyne soil abundancese0
- Direction
- reducede0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_penetrates_a_tomato_root_-_USDA-ARS.jpg?width=500)
Verbatim
t0“Sweetpotato”
e0“Fumigation using 1,3-dichloropropene (1,3-D) was the only consistently effective nematicide at improving marketable yield relative to control and also consistently reduced most storage root galling measurements and midseason Meloidogyne soil abundances”
Claim · model-written summary
Fluensulfone at 4 kg a.i./ha consistently improved total yield of sweetpotato.
- Taxon
- SweetpotatoIpomoea batatast0
- Treatment
- Fluensulfone at 4 kg a.i./hae0
- Outcome
- total yielde0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sweetpotato”
e0“Fluensulfone at 4 kg a.i./ha consistently improved total yield”
Claim · model-written summary
Fluensulfone at 4 kg a.i./ha did not improve marketable yield of sweetpotato.
- Taxon
- SweetpotatoIpomoea batatast0
- Treatment
- Fluensulfone at 4 kg a.i./hae0
- Outcome
- marketable yielde0
- Direction
- no_changeinferrede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sweetpotato”
e0“Fluensulfone at 4 kg a.i./ha consistently improved total yield but not marketable yield”
Claim · model-written summary
Fluensulfone at 2 kg a.i./ha did not improve yield of sweetpotato.
- Taxon
- SweetpotatoIpomoea batatast0
- Treatment
- fluensulfone at 2 kg a.i./hae0
- Outcome
- yielde0
- Direction
- did not improvee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sweetpotato”
e0“fluensulfone at 2 kg a.i./ha, fluazaindolizine, and fluopyram did not improve yield”
Claim · model-written summary
Fluazaindolizine did not improve yield of sweetpotato.
- Taxon
- SweetpotatoIpomoea batatast0
- Treatment
- fluazaindolizinee0
- Outcome
- yielde0
- Direction
- did not improvee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sweetpotato”
e0“fluensulfone at 2 kg a.i./ha, fluazaindolizine, and fluopyram did not improve yield”
Claim · model-written summary
Fluopyram did not improve yield of sweetpotato.
- Taxon
- SweetpotatoIpomoea batatast0
- Treatment
- fluopyrame0
- Outcome
- yielde0
- Direction
- did not improvee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sweetpotato”
e0“fluensulfone at 2 kg a.i./ha, fluazaindolizine, and fluopyram did not improve yield”
Claim · model-written summary
Each fluorinated nematicide treatment reduced at least one nematode symptom or nematode soil abundances relative to control, but none gave consistent benefits across years.
- Taxon
- SweetpotatoIpomoea batatast0
- Treatment
- fluorinated nematicide treatmente0
- Outcome
- nematode symptom or nematode soil abundancese0
- Direction
- reducede0
- Qualifier
- none provided consistent benefits across yearse0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sweetpotato”
e0“Each fluorinated nematicide treatment reduced at least one nematode symptom or nematode soil abundances relative to control, but none provided consistent benefits across years”
Claim · model-written summary
Even with 1,3-D fumigation, sweetpotato yield was poor.
- Taxon
- SweetpotatoIpomoea batatast0
- Treatment
- 1,3-D fumigatione0
- Outcome
- yield was poore0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sweetpotato”
e0“Even with 1,3-D fumigation, yield was poor”
Claim · model-written summary
None of the nematicide treatments provided a significant return on investment relative to forgoing nematicide application.
- Taxon
- SweetpotatoIpomoea batatast0
- Treatment
- nematicide treatmentse0
- Outcome
- return on investmente0
- Direction
- no_changeinferrede0
- Comparator
- forgoing nematicide applicatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sweetpotato”
e0“none of the nematicide treatments provided a significant return on investment relative to forgoing nematicide application”
Claim · model-written summary
The nematicide treatments had minimal effects on free-living nematodes.
- Taxon
- SweetpotatoIpomoea batatast0
- Interactor
- free-living nematodese0other
- Outcome
- free-living nematodese0
- Direction
- minimal effectse0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sweetpotato”
e0“There were minimal effects on free-living nematodes”
Claim · model-written summary
The authors conclude that 1,3-D is an effective nematicide for M. enterolobii management in sweetpotato, but additional management is needed under severe M. enterolobii pressure.
- Taxon
- SweetpotatoIpomoea batatast0
- Outcome
- M. enterolobii managemente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sweetpotato”
e0“1,3-D is an effective nematicide for M. enterolobii management, but additional management will be needed under severe M. enterolobii pressure”
The same questions in other papers
fluazaindolizine · yield · Ipomoea batatas (sweet potato)Results differ
1 in the opposite direction
- positive
fluopyram · yield · Ipomoea batatas (sweet potato)Results agree
1 paper in the same direction as this paper
- no effect
insecticide · yield · Ipomoea batatas (sweet potato)Positive and negative results
3 papers in the same direction as this paper · 5 reporting no difference from an alternative
- positive
- positive
- positive
5 papers more in this group
See all 9 papers →solarization · quality: postharvest · Ipomoea batatas (sweet potato)Results agree
1 paper in the same direction as this paper
- positive
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.