Abstract
Peanut is an important crop in Alabama, where it is vulnerable to damage by root-knot nematodes, particularly peanut root-knot nematodes (PRKN, Meloidogyne arenaria Race 1). Peanut cultivars with resistance to this nematode, as well as nematicides, are used for minimizing yield losses due to PRKN. In this study, the efficacy of the nematicides fluopyram and aldicarb, applied in-furrow, along with cultivar resistance, are evaluated for managing PRKN populations and damage attributed to them, as well as impacts on pod yields and non-target effects on other diseases. In 2016, 2017, and 2018 on an irrigated site with a resident PRKN population, each of two nematicides as well as a control were applied to each of three peanut cultivars. Peanut cultivars included the PRKN-susceptible industry standard Georgia-06G along with the PRKN-resistant Tifguard (2016 only), Georgia-14N (all years), and TifNV-High O/L (2017 and 2018). TifNV-High O/L often had superior plant vigor ratings compared with Georgia-06G and to a lesser extent Georgia-14N. Similar plant vigor, pod galling, PRKN junvenile counts, as well as yield were often noted across all nematicide treatments, including the no-nematicide control. While early and late leaf spot diseases, caused by Passalora arachidicola and Nothopassalora personata, respectively, were low in all study years, these diseases were lower in 2018 on TifNV-High O/L and Georgia-14N than on Georgia-06G. Stem rot, caused by Agroathelia rolfsii, occurrence was low in each study year; however, Georgia-06G had greater disease indices than the nematode resistant cultivars with Georgia-14N having the least damage. While resistant cultivars had lower PRKN juvenile counts and negligible pod galling compared with Georgia-06G in each study year, TifNV-High O/L produced significantly greater yield in 2017 and 2018 than Georgia-06G or Georgia-14N. Georgia-14N had greater yield than Georgia-06G only in 2016. Overall, the PRKN-resistant cultivars often produced greater pod yields while suffering less damage from diseases and PRKN when compared with the current susceptible industry standard Georgia-06G, while no yield protection was provided by either nematicide.
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Claims 13
Claim · model-written summary
TifNV-High O/L often had superior vigor to Georgia-06G and to a lesser extent Georgia-14N.
- Taxon
- peanut
Arachis hypogaeat0 - Material
- TifNV-High O/Le0
- Outcome
- plant vigor ratingse0
- Direction
- superiore0
- Qualifier
- to a lesser extent Georgia-14Ne0
- Comparator
- Georgia-06Ge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“TifNV-High O/L often had superior plant vigor ratings compared with Georgia-06G and to a lesser extent Georgia-14N.”
t0“peanut root-knot”
Claim · model-written summary
Plant vigor, pod galling and juvenile counts were often similar across nematicide treatments.
- Taxon
- peanutArachis hypogaeat0
- Treatment
- nematicide treatmentse0
- Interactor
- PRKNe0pest
- Outcome
- plant vigor, pod galling, PRKN junvenile countse0
- Direction
- Similare0
- Comparator
- no-nematicide controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Similar plant vigor, pod galling, PRKN junvenile counts, as well as yield were often noted across all nematicide treatments, including the no-nematicide control.”
t0“peanut root-knot”
Claim · model-written summary
Yield was often similar across nematicide treatments.
- Taxon
- peanutArachis hypogaeat0
- Treatment
- nematicide treatmentse0
- Outcome
- yielde0
- Direction
- Similare0
- Comparator
- no-nematicide controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Similar plant vigor, pod galling, PRKN junvenile counts, as well as yield were often noted across all nematicide treatments, including the no-nematicide control.”
t0“peanut root-knot”
Claim · model-written summary
Leaf spot diseases were lower on TifNV-High O/L than Georgia-06G in 2018.
- Taxon
- peanutArachis hypogaeat0
- Material
- TifNV-High O/Le0
- Interactor
- Passalora arachidicolaMycosphaerella arachidise1pathogen
- Second interactor
- Nothopassalora personataNothopassalora personatae1pathogen
- Outcome
- these diseasese0
- Direction
- lowere0
- Qualifier
- 2018e0
- Comparator
- Georgia-06Ge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“these diseases were lower in 2018 on TifNV-High O/L and Georgia-14N than on Georgia-06G.”
e1“early and late leaf spot diseases, caused by Passalora arachidicola and Nothopassalora personata”
t0“peanut root-knot”
Claim · model-written summary
Leaf spot diseases were lower on Georgia-14N than Georgia-06G in 2018.
- Taxon
- peanutArachis hypogaeat0
- Material
- Georgia-14Ne0
- Interactor
- Passalora arachidicolaMycosphaerella arachidise1pathogen
- Second interactor
- Nothopassalora personataNothopassalora personatae1pathogen
- Outcome
- these diseasese0
- Direction
- lowere0
- Qualifier
- 2018e0
- Comparator
- Georgia-06Ge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“these diseases were lower in 2018 on TifNV-High O/L and Georgia-14N than on Georgia-06G.”
e1“early and late leaf spot diseases, caused by Passalora arachidicola and Nothopassalora personata”
t0“peanut root-knot”
Claim · model-written summary
Stem rot occurrence was low each year.
- Taxon
- peanutArachis hypogaeat0
- Interactor
- Agroathelia rolfsii
Agroathelia rolfsiie0pathogen - Outcome
- Stem rote0
- Direction
- lowe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Stem rot, caused by Agroathelia rolfsii, occurrence was low in each study year; however, Georgia-06G had greater disease indices than the nematode resistant cultivars with Georgia-14N having the least damage.”
t0“peanut root-knot”
Claim · model-written summary
Georgia-06G had greater stem rot indices than resistant cultivars.
- Taxon
- peanutArachis hypogaeat0
- Material
- Georgia-06Ge0
- Interactor
- Agroathelia rolfsiiAgroathelia rolfsiie0pathogen
- Outcome
- disease indicese0
- Direction
- greatere0
- Comparator
- nematode resistant cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Stem rot, caused by Agroathelia rolfsii, occurrence was low in each study year; however, Georgia-06G had greater disease indices than the nematode resistant cultivars with Georgia-14N having the least damage.”
t0“peanut root-knot”
Claim · model-written summary
Georgia-14N had the least stem rot damage.
- Taxon
- peanutArachis hypogaeat0
- Material
- Georgia-14Ne0
- Interactor
- Agroathelia rolfsiiAgroathelia rolfsiie0pathogen
- Outcome
- damagee0
- Direction
- leaste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Stem rot, caused by Agroathelia rolfsii, occurrence was low in each study year; however, Georgia-06G had greater disease indices than the nematode resistant cultivars with Georgia-14N having the least damage.”
t0“peanut root-knot”
Claim · model-written summary
Resistant cultivars had lower PRKN juvenile counts than Georgia-06G.
- Taxon
- peanutArachis hypogaeat0
- Material
- resistant cultivarse0
- Interactor
- PRKNe0pest
- Outcome
- PRKN juvenile countse0
- Direction
- lowere0
- Comparator
- Georgia-06Ge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“resistant cultivars had lower PRKN juvenile counts and negligible pod galling compared with Georgia-06G in each study year”
t0“peanut root-knot”
Claim · model-written summary
Resistant cultivars had negligible pod galling compared with Georgia-06G.
- Taxon
- peanutArachis hypogaeat0
- Material
- resistant cultivarse0
- Interactor
- PRKNe0pest
- Outcome
- pod gallinge0
- Direction
- negligiblee0
- Comparator
- Georgia-06Ge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“resistant cultivars had lower PRKN juvenile counts and negligible pod galling compared with Georgia-06G in each study year”
t0“peanut root-knot”
Claim · model-written summary
TifNV-High O/L yielded significantly more than Georgia-06G and Georgia-14N in 2017 and 2018.
- Taxon
- peanutArachis hypogaeat0
- Material
- TifNV-High O/Le0
- Outcome
- yielde0
- Direction
- greatere0
- Qualifier
- 2017 and 2018e0
- Comparator
- Georgia-06G or Georgia-14Ne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“TifNV-High O/L produced significantly greater yield in 2017 and 2018 than Georgia-06G or Georgia-14N.”
t0“peanut root-knot”
Claim · model-written summary
Georgia-14N yielded more than Georgia-06G only in 2016.
- Taxon
- peanutArachis hypogaeat0
- Material
- Georgia-14Ne0
- Outcome
- yielde0
- Direction
- greatere0
- Qualifier
- 2016e0
- Comparator
- Georgia-06Ge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Georgia-14N had greater yield than Georgia-06G only in 2016.”
t0“peanut root-knot”
Claim · model-written summary
Neither nematicide provided yield protection.
- Taxon
- peanutArachis hypogaeat0
- Treatment
- nematicidee0
- Outcome
- yield protectione0
- Direction
- no yield protectione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no yield protection was provided by either nematicide.”
t0“peanut root-knot”
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