Paper · 2000 · African plant protection

Occurrence and prominence of insect guilds on vegetable amaranth (Amaranthus hybridus) cultivated in the central Free State, South Africa.

Stefan Louw; E. Myburgh

9
claims
16
verbatim quotes
4
citations
2
research areas
—
Not open access

Abstract

In the 1995/96 growing season 92 species of insects were sampled in direct association with cultivated Amaranthus hybridus at Tempe airbase, near Bloemfontein in the central Free State Province. These species comprised live feeding guilds, i.e. phytophages, sap suckers, predators, parasitoids and tourists. The stems, leaves, seeds and pollen of the plant were severely attacked by several species of the phytophagous guild. Dominance and prominence values of all the amaranth insects were determined. Overall three phytophages (A stylus atromaculatus, a Lygus sp. and an unidentified Coreidae sp. and a predator, Hippodamia variegata, were numerically superior. Although not dominant or prominent within the arthropod guild structure on amaranth, the most structurally injurious species proved to be the pigweed weevil Hypolixus haerens. Both larvae and adults of this weevil attack the crop, the former as leaf chewers and the latter as stem borers.

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Claims 9

Observationobservedoriginal resultmeasured

Claim · model-written summary

Ninety-two insect species were sampled in association with cultivated amaranth.

Taxon
Amaranthus hybridusAmaranthus hybriduse0
Interactor
insectsInsectae0pest
Outcome
species of insectse0
Value
92 speciese0
Setting
Tempe airbase, near Bloemfontein in the central Free State Provincee0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Amaranthus hybridus
Amaranthus hybridus · TaxonUser:MarkusHagenlocher · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“In the 1995/96 growing season 92 species of insects were sampled in direct association with cultivated Amaranthus hybridus at Tempe airbase, near Bloemfontein in the central Free State Province.”

✓ located verbatim in the source · abstract, characters 0–194 · show in text ↑
Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

Phytophagous insects severely attacked amaranth stems, leaves, seeds and pollen.

Taxon
vegetable amarantht0
Interactor
phytophagous guilde0pest
Outcome
stems, leaves, seeds and pollen of the plant were severely attackede0

Verbatim

e0

“The stems, leaves, seeds and pollen of the plant were severely attacked by several species of the phytophagous guild.”

✓ located verbatim in the source · abstract, characters 308–425 · show in text ↑
t0

“vegetable amaranth (Amaranthus hybridus)”

✓ located verbatim in the source · title, characters 46–86 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

A stylus atromaculatus was numerically superior among insects associated with amaranth.

Taxon
vegetable amarantht0
Interactor
A stylus atromaculatuse0pest
Outcome
numerically superiore0

Verbatim

e0

“Overall three phytophages (A stylus atromaculatus, a Lygus sp. and an unidentified Coreidae sp. and a predator, Hippodamia variegata, were numerically superior.”

✓ located verbatim in the source · abstract, characters 503–663 · show in text ↑
t0

“vegetable amaranth (Amaranthus hybridus)”

✓ located verbatim in the source · title, characters 46–86 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

a Lygus sp. was numerically superior among insects associated with amaranth.

Taxon
vegetable amarantht0
Interactor
a Lygus sp.e0pest
Outcome
numerically superiore0

Verbatim

e0

“Overall three phytophages (A stylus atromaculatus, a Lygus sp. and an unidentified Coreidae sp. and a predator, Hippodamia variegata, were numerically superior.”

✓ located verbatim in the source · abstract, characters 503–663 · show in text ↑
t0

“vegetable amaranth (Amaranthus hybridus)”

✓ located verbatim in the source · title, characters 46–86 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

an unidentified Coreidae sp. was numerically superior among insects associated with amaranth.

Taxon
vegetable amarantht0
Interactor
an unidentified Coreidae sp.e0pest
Outcome
numerically superiore0

Verbatim

e0

“Overall three phytophages (A stylus atromaculatus, a Lygus sp. and an unidentified Coreidae sp. and a predator, Hippodamia variegata, were numerically superior.”

✓ located verbatim in the source · abstract, characters 503–663 · show in text ↑
t0

“vegetable amaranth (Amaranthus hybridus)”

✓ located verbatim in the source · title, characters 46–86 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Hippodamia variegata was numerically superior among insects associated with amaranth.

Taxon
vegetable amarantht0
Interactor
Hippodamia variegataHippodamia variegatae0other
Outcome
numerically superiore0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Hippodamia variegata
Hippodamia variegata · InteractorHectonichus · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Overall three phytophages (A stylus atromaculatus, a Lygus sp. and an unidentified Coreidae sp. and a predator, Hippodamia variegata, were numerically superior.”

✓ located verbatim in the source · abstract, characters 503–663 · show in text ↑
t0

“vegetable amaranth (Amaranthus hybridus)”

✓ located verbatim in the source · title, characters 46–86 · show in text ↑
Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

Hypolixus haerens was the most structurally injurious amaranth insect despite lacking dominance or prominence.

Interactor
Hypolixus haerensHypolixus picae0pest
Outcome
most structurally injurious speciese0
Qualifier
not dominant or prominente0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Amaranthus caudatus
Amaranthus caudatus · TaxonTubifex · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Although not dominant or prominent within the arthropod guild structure on amaranth, the most structurally injurious species proved to be the pigweed weevil Hypolixus haerens.”

✓ located verbatim in the source · abstract, characters 664–839 · show in text ↑
Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

Hypolixus haerens larvae chew amaranth leaves.

Organ / stage
leavese0
Interactor
pigweed weevil Hypolixus haerensHypolixus picae0pest
Outcome
leaf chewerse0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Amaranthus caudatus
Amaranthus caudatus · TaxonTubifex · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“The stems, leaves, seeds and pollen of the plant were severely attacked by several species of the phytophagous guild. Dominance and prominence values of all the amaranth insects were determined. Overall three phytophages (A stylus atromaculatus, a Lygus sp. and an unidentified Coreidae sp. and a predator, Hippodamia variegata, were numerically superior. Although not dominant or prominent within the arthropod guild structure on amaranth, the most structurally injurious species proved to be the pigweed weevil Hypolixus haerens. Both larvae and adults of this weevil attack the crop, the former as leaf chewers and the latter as stem borers.”

✓ located verbatim in the source · abstract, characters 308–952 · show in text ↑
t0

“vegetable amaranth (Amaranthus hybridus)”

✓ located verbatim in the source · title, characters 46–86 · show in text ↑
Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

Hypolixus haerens adults bore amaranth stems.

Organ / stage
stemse0
Interactor
pigweed weevil Hypolixus haerensHypolixus picae0pest
Outcome
stem borerse0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Amaranthus caudatus
Amaranthus caudatus · TaxonTubifex · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“The stems, leaves, seeds and pollen of the plant were severely attacked by several species of the phytophagous guild. Dominance and prominence values of all the amaranth insects were determined. Overall three phytophages (A stylus atromaculatus, a Lygus sp. and an unidentified Coreidae sp. and a predator, Hippodamia variegata, were numerically superior. Although not dominant or prominent within the arthropod guild structure on amaranth, the most structurally injurious species proved to be the pigweed weevil Hypolixus haerens. Both larvae and adults of this weevil attack the crop, the former as leaf chewers and the latter as stem borers.”

✓ located verbatim in the source · abstract, characters 308–952 · show in text ↑
t0

“vegetable amaranth (Amaranthus hybridus)”

✓ located verbatim in the source · title, characters 46–86 · show in text ↑