Abstract
The degree of control of purple nutsedge ( Cyperus rotundus L.) provided by Bactra verutana Zeller, a native moth, was evaluated for various stress conditions. Two, three, or four weekly infestations each with three larvae per live shoot, reduced purple nutsedge dry weight an average 77% compared with an average 55% for one infestation. Eight weekly infestations reduced plant dry weight 98%. Neither caging of the larvae on the plants nor osmotic stress with NaCl to −8 bars influenced larval efficacy, but nitrogen deficiency did reduce the effect of the larvae about 75%. Purple nutsedge had no effect on the dry weight of cucumber ( Cucumis sativus L., ‘Straight Eight’) after 1 month, whether larvae were or were not present. Purple nutsedge did reduce the plant dry weight of okra ( Abelmoschus esculentus (L.) Moench, ‘Clemson Spineless’) 64%, but repeated (eight) weekly infestations of larvae gave a plant weight of okra equal to that of okra grown without purple nutsedge. Purple nutsedge reduced the bulb and root dry weight of onion ( Allium cepa L., ‘Big Valley’) 37%, but repeated weekly infestations of larvae gave onion growth equal to that of onion grown without purple nutsedge.
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Claims 10
Claim · model-written summary
Two to four weekly moth infestations reduced purple nutsedge dry weight by 77% on average versus 55% for one infestation.
- Taxon
- purple nutsedgee0
- Treatment
- Two, three, or four weekly infestations each with three larvae per live shoote0
- Interactor
- Bactra verutana Zeller
.jpg?width=60)
Bactra verutanae1herbivore - Outcome
- purple nutsedge dry weighte0
- Direction
- reducede0
- Value
- 77%e0
- Qualifier
- 55%e0
- Comparator
- one infestatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Two, three, or four weekly infestations each with three larvae per live shoot, reduced purple nutsedge dry weight an average 77% compared with an average 55% for one infestation.”
e1“Bactra verutana Zeller, a native moth”
Claim · model-written summary
Eight weekly infestations reduced purple nutsedge dry weight by 98%.
- Taxon
- Purple Nutsedget0
- Treatment
- Eight weekly infestationse0
- Interactor
- Bactra verutanaZellerBactra verutanat0herbivore
- Outcome
- plant dry weighte0
- Direction
- reducede0
- Value
- 98%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Eight weekly infestations reduced plant dry weight 98%.”
t0“Purple Nutsedge byBactra verutanaZeller”
Claim · model-written summary
Caging the larvae did not influence their efficacy against purple nutsedge.
- Taxon
- Purple Nutsedget0
- Treatment
- caging of the larvae on the plantse0
- Interactor
- Bactra verutanaZellerBactra verutanat0herbivore
- Outcome
- larval efficacye0
- Direction
- influencede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Neither caging of the larvae on the plants nor osmotic stress with NaCl to −8 bars influenced larval efficacy”
t0“Purple Nutsedge byBactra verutanaZeller”
Claim · model-written summary
Osmotic stress with NaCl to −8 bars did not influence larval efficacy on purple nutsedge.
- Taxon
- Purple Nutsedget0
- Treatment
- osmotic stress with NaCl to −8 barse0
- Interactor
- Bactra verutanaZellerBactra verutanat0herbivore
- Outcome
- larval efficacye0
- Direction
- influencede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Neither caging of the larvae on the plants nor osmotic stress with NaCl to −8 bars influenced larval efficacy”
t0“Purple Nutsedge byBactra verutanaZeller”
Claim · model-written summary
Nitrogen deficiency reduced larval efficacy against purple nutsedge by about 75%.
- Taxon
- Purple Nutsedget0
- Treatment
- nitrogen deficiencye0
- Interactor
- Bactra verutanaZellerBactra verutanat0herbivore
- Outcome
- effect of the larvaee0
- Direction
- reducee0
- Value
- 75%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“nitrogen deficiency did reduce the effect of the larvae about 75%.”
t0“Purple Nutsedge byBactra verutanaZeller”
Claim · model-written summary
Purple nutsedge did not affect cucumber dry weight after one month, with or without larvae.
- Taxon
- cucumber
Cucumis sativuse0 - Material
- Straight Eighte0
- Treatment
- Purple nutsedgee0
- Interactor
- Purple nutsedgee0weed
- Outcome
- dry weight of cucumbere0
- Direction
- no effecte0
- Qualifier
- after 1 monthe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Purple nutsedge had no effect on the dry weight of cucumber ( Cucumis sativus L., ‘Straight Eight’) after 1 month, whether larvae were or were not present.”
Claim · model-written summary
Purple nutsedge reduced okra plant dry weight by 64%.
- Taxon
- okra
.jpg?width=60)
Abelmoschus esculentuse0 - Material
- Clemson Spinelesse0
- Treatment
- Purple nutsedgee0
- Interactor
- Purple nutsedgee0weed
- Outcome
- plant dry weight of okrae0
- Direction
- reducee0
- Value
- 64%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Purple nutsedge did reduce the plant dry weight of okra ( Abelmoschus esculentus (L.) Moench, ‘Clemson Spineless’) 64%”
Claim · model-written summary
Eight weekly larval infestations restored okra weight to that of okra without purple nutsedge.
- Taxon
- okraAbelmoschus esculentuse0
- Treatment
- repeated (eight) weekly infestations of larvaee0
- Interactor
- purple nutsedgee0weed
- Second interactor
- Bactra verutanaZellerBactra verutanat0biocontrol_agent
- Outcome
- plant weight of okrae0
- Direction
- equal toe0
- Comparator
- okra grown without purple nutsedgee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“repeated (eight) weekly infestations of larvae gave a plant weight of okra equal to that of okra grown without purple nutsedge.”
t0“Purple Nutsedge byBactra verutanaZeller”
Claim · model-written summary
Purple nutsedge reduced onion bulb and root dry weight by 37%.
- Taxon
- onion
Allium cepae0 - Material
- Big Valleye0
- Treatment
- Purple nutsedgee0
- Interactor
- Purple nutsedgee0weed
- Outcome
- bulb and root dry weight of onione0
- Direction
- reducede0
- Value
- 37%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Purple nutsedge reduced the bulb and root dry weight of onion ( Allium cepa L., ‘Big Valley’) 37%”
Claim · model-written summary
Repeated weekly larval infestations restored onion growth to that without purple nutsedge.
- Taxon
- onionAllium cepae0
- Treatment
- repeated weekly infestations of larvaee0
- Interactor
- purple nutsedgee0weed
- Outcome
- onion growthe0
- Direction
- equal toe0
- Comparator
- onion grown without purple nutsedgee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“repeated weekly infestations of larvae gave onion growth equal to that of onion grown without purple nutsedge.”
The same questions in other papers
infection · growth · Abelmoschus esculentus (okra)Positive and negative results
2 in the opposite direction
- negative
- no effect
infection · growth · Allium cepa (onion)Positive and negative results
7 papers in the same direction as this paper · 2 in the opposite direction
- negative
- no effect
- positive
6 papers more in this group
See all 10 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.