Abstract
The sugarcane aphid, Melanaphis sacchari (Zehntner) (Hemiptera: Aphididae), is an invasive sorghum pest that has threatened over 90% of North American sorghum production. Resident parasitoids, coccinellids, syrphids, and lacewings prey on this aphid. Our objective was to compare and estimate parasitoid and predator suppression of sugarcane aphids placed on resistant and susceptible hybrids in a field setting using natural enemy exclusion cages. During 2018 and 2019 along the Texas Gulf Coast and Central Oklahoma, three natural enemy exclusion treatments-no exclusion (full access for parasitoids and predators), partial exclusion (access limited to parasitoids), and complete exclusion (excludes parasitoids and predators)-were used. The parasitoid Aphelinus nigritus Howard (Hymenoptera: Aphelinidae) accounted for 90% of recovered natural enemies. In 2018, aphid suppression attributable to A. nigritus was ca. 95% on the resistant hybrids and 80% on the susceptible hybrids when comparing aphid counts from complete and partial exclusion treatments, while few predators were observed. In 2019, aphid suppression was attributed to a combination of predation and parasitism. Relatively more predators were recorded at both sites, accounting for 14% to 33% of specimens recovered in the no exclusion treatment. Aphid suppression attributed to predators and parasitoids ranged from 85% on aphid-resistant hybrids and 27% on susceptible hybrids in south Texas and >95% on both hybrids in Oklahoma when comparing aphid abundance in the complete and no exclusion treatments. Parasitism and predation contributed to aphid regulation on both hybrids, which may accrue multiple benefits leading to a more resilient sugarcane aphid management system.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 9
Claim · model-written summary
In 2018, natural enemies suppressed sugarcane aphid by ca. 95% on resistant sorghum hybrids when complete exclusion was compared with partial exclusion, attributable to A. nigritus.
- Material
- resistant hybridse1
- Treatment
- complete exclusione6
- Interactor
- Melanaphis sacchariMelanaphis saccharie0pest
- Second interactor
- A. nigrituse1biocontrol_agent
- Outcome
- aphid suppression attributable to A. nigrituse1
- Direction
- increaseinferrede1
- Value
- ca. 95%e1
- Comparator
- partial exclusione1
SorghumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sugarcane aphid, Melanaphis sacchari (Zehntner) (Hemiptera: Aphididae), is an invasive sorghum pest that has threatened over 90% of North American sorghum production”
e1“In 2018, aphid suppression attributable to A. nigritus was ca. 95% on the resistant hybrids and 80% on the susceptible hybrids when comparing aphid counts from complete and partial exclusion treatments, while few predators were observed”
e6“complete exclusion (excludes parasitoids and predators)”
Claim · model-written summary
In 2018, natural enemies suppressed sugarcane aphid by 80% on susceptible sorghum hybrids when complete exclusion was compared with partial exclusion, attributable to A. nigritus.
- Material
- susceptible hybridse1
- Treatment
- complete exclusione6
- Interactor
- Melanaphis sacchariMelanaphis saccharie0pest
- Second interactor
- A. nigrituse1biocontrol_agent
- Outcome
- aphid suppression attributable to A. nigrituse1
- Direction
- increaseinferrede1
- Value
- 80%e1
- Comparator
- partial exclusione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sugarcane aphid, Melanaphis sacchari (Zehntner) (Hemiptera: Aphididae), is an invasive sorghum pest that has threatened over 90% of North American sorghum production”
e1“In 2018, aphid suppression attributable to A. nigritus was ca. 95% on the resistant hybrids and 80% on the susceptible hybrids when comparing aphid counts from complete and partial exclusion treatments, while few predators were observed”
e6“complete exclusion (excludes parasitoids and predators)”
Claim · model-written summary
In 2018, few predators were observed on the sorghum hybrids.
- Outcome
- few predators were observede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sugarcane aphid, Melanaphis sacchari (Zehntner) (Hemiptera: Aphididae), is an invasive sorghum pest that has threatened over 90% of North American sorghum production”
e1“while few predators were observed”
Claim · model-written summary
In 2019, aphid suppression on sorghum hybrids was attributed to a combination of predation and parasitism.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sugarcane aphid, Melanaphis sacchari (Zehntner) (Hemiptera: Aphididae), is an invasive sorghum pest that has threatened over 90% of North American sorghum production”
e7“In 2019, aphid suppression was attributed to a combination of predation and parasitism”
Claim · model-written summary
Predators accounted for 14% to 33% of specimens recovered in the no exclusion treatment, at both sites in Texas and Oklahoma.
- Outcome
- predatorse4
- Value
- 14% to 33%e4
- Qualifier
- of specimens recovered in the no exclusion treatmente4
- Setting
- Texas Gulf Coast and Central Oklahomae3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sugarcane aphid, Melanaphis sacchari (Zehntner) (Hemiptera: Aphididae), is an invasive sorghum pest that has threatened over 90% of North American sorghum production”
e3“During 2018 and 2019 along the Texas Gulf Coast and Central Oklahoma”
e4“Relatively more predators were recorded at both sites, accounting for 14% to 33% of specimens recovered in the no exclusion treatment”
Claim · model-written summary
Aphelinus nigritus accounted for 90% of recovered natural enemies.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sugarcane aphid, Melanaphis sacchari (Zehntner) (Hemiptera: Aphididae), is an invasive sorghum pest that has threatened over 90% of North American sorghum production”
e2“The parasitoid Aphelinus nigritus Howard (Hymenoptera: Aphelinidae) accounted for 90% of recovered natural enemies”
Claim · model-written summary
In south Texas, predators and parasitoids suppressed sugarcane aphid by 85% on aphid-resistant sorghum hybrids relative to no exclusion.
- Material
- aphid-resistant hybridse5
- Treatment
- complete exclusione6
- Interactor
- Melanaphis sacchariMelanaphis saccharie0pest
- Outcome
- aphid suppressione5
- Direction
- increaseinferrede5
- Value
- 85%e5
- Comparator
- no exclusione5
- Setting
- south Texase5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sugarcane aphid, Melanaphis sacchari (Zehntner) (Hemiptera: Aphididae), is an invasive sorghum pest that has threatened over 90% of North American sorghum production”
e5“Aphid suppression attributed to predators and parasitoids ranged from 85% on aphid-resistant hybrids and 27% on susceptible hybrids in south Texas and >95% on both hybrids in Oklahoma when comparing aphid abundance in the complete and no exclusion treatments”
e6“complete exclusion (excludes parasitoids and predators)”
Claim · model-written summary
In south Texas, predators and parasitoids suppressed sugarcane aphid by 27% on susceptible sorghum hybrids relative to no exclusion.
- Material
- susceptible hybridse5
- Treatment
- complete exclusione6
- Interactor
- Melanaphis sacchariMelanaphis saccharie0pest
- Outcome
- aphid suppressione5
- Direction
- increaseinferrede5
- Value
- 27%e5
- Comparator
- no exclusione5
- Setting
- south Texase5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sugarcane aphid, Melanaphis sacchari (Zehntner) (Hemiptera: Aphididae), is an invasive sorghum pest that has threatened over 90% of North American sorghum production”
e5“Aphid suppression attributed to predators and parasitoids ranged from 85% on aphid-resistant hybrids and 27% on susceptible hybrids in south Texas and >95% on both hybrids in Oklahoma when comparing aphid abundance in the complete and no exclusion treatments”
e6“complete exclusion (excludes parasitoids and predators)”
Claim · model-written summary
In Oklahoma, predators and parasitoids suppressed sugarcane aphid by more than 95% on both sorghum hybrids relative to no exclusion.
- Material
- both hybridse5
- Treatment
- complete exclusione6
- Interactor
- Melanaphis sacchariMelanaphis saccharie0pest
- Outcome
- aphid suppressione5
- Direction
- increaseinferrede5
- Value
- >95%e5
- Comparator
- no exclusione5
- Setting
- Oklahomae5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sugarcane aphid, Melanaphis sacchari (Zehntner) (Hemiptera: Aphididae), is an invasive sorghum pest that has threatened over 90% of North American sorghum production”
e5“Aphid suppression attributed to predators and parasitoids ranged from 85% on aphid-resistant hybrids and 27% on susceptible hybrids in south Texas and >95% on both hybrids in Oklahoma when comparing aphid abundance in the complete and no exclusion treatments”
e6“complete exclusion (excludes parasitoids and predators)”