Abstract
Field releases of a tachinid parasite, Lixophaga diatraeae (Townsend), were made in July and September 1973 to evaluate its potential for suppressing populations of the sugarcane borer, Diatraea saccharalis (F.), in Louisiana. Sugarcane borer larval collections were obtained from the field every 2 wk to determine host density levels and percent parasitism. Release of 1418 parasites/ha did not decrease host density. Sugarcane borer larval populations steadily increased to levels above that required to cause economic loss as the crop season progressed. Screen cage experiments were conducted from June through November 1974 to further evaluate the effectiveness of L. diatraeae. Parasitism was low following an August release; however, 8- to 9-day-old parasites were more efficient than those 5 days old. Percent parasitism of sugarcane borer larvae by L. diatraeae was higher following an October release than when releases were made in August. A significant positive correlation between percent parasitism and host population density was detected in screen cage experiments but not in the field test.
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Claims 7
Claim · model-written summary
Release of 1418 parasites/ha did not decrease sugarcane borer density.
- Taxon
- sugarcanee1
- Treatment
- Release of 1418 parasites/hae0
- Interactor
- Diatraea saccharalis
Diatraea saccharalise1pest - Second interactor
- Lixophaga diatraeaee2biocontrol_agent
- Outcome
- host densitye0
- Direction
- did not decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Release of 1418 parasites/ha did not decrease host density.”
e1“sugarcane borer, Diatraea saccharalis (F.)”
e2“a tachinid parasite, Lixophaga diatraeae (Townsend)”
Claim · model-written summary
Sugarcane borer larval populations rose above economically damaging levels as the crop season progressed.
- Taxon
- Sugarcanee0
- Interactor
- Sugarcane borerDiatraea saccharalise0pest
- Outcome
- Sugarcane borer larval populationse0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sugarcane borer larval populations steadily increased to levels above that required to cause economic loss as the crop season progressed.”
Claim · model-written summary
Parasitism was low after the August release.
- Taxon
- sugarcanee1
- Interactor
- Diatraea saccharalisDiatraea saccharalise1pest
- Outcome
- Parasitisme0
- Direction
- lowe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Parasitism was low following an August release”
e1“sugarcane borer, Diatraea saccharalis (F.)”
Claim · model-written summary
Eight- to nine-day-old parasites were more efficient than five-day-old parasites.
- Taxon
- sugarcanee1
- Interactor
- Diatraea saccharalisDiatraea saccharalise1pest
- Second interactor
- Lixophaga diatraeaee2biocontrol_agent
- Outcome
- more efficiente0
- Direction
- more efficiente0
- Comparator
- those 5 days olde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“8- to 9-day-old parasites were more efficient than those 5 days old”
e1“sugarcane borer, Diatraea saccharalis (F.)”
e2“a tachinid parasite, Lixophaga diatraeae (Townsend)”
Claim · model-written summary
October releases produced higher parasitism of sugarcane borer larvae than August releases.
- Taxon
- sugarcanee1
- Treatment
- October releasee0
- Interactor
- sugarcane borerDiatraea saccharalise0pest
- Second interactor
- L. diatraeaee0biocontrol_agent
- Outcome
- Percent parasitism of sugarcane borer larvaee0
- Direction
- highere0
- Comparator
- releases were made in Auguste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Percent parasitism of sugarcane borer larvae by L. diatraeae was higher following an October release than when releases were made in August.”
e1“sugarcane borer, Diatraea saccharalis (F.)”
Claim · model-written summary
Percent parasitism correlated positively with host population density in screen cages.
- Taxon
- sugarcanee1
- Interactor
- Diatraea saccharalisDiatraea saccharalise1pest
- Outcome
- percent parasitisme0
- Direction
- positivee0
- Setting
- screen cage experimentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A significant positive correlation between percent parasitism and host population density was detected in screen cage experiments but not in the field test.”
e1“sugarcane borer, Diatraea saccharalis (F.)”
Claim · model-written summary
The parasitism and host-density correlation was not detected in the field test.
- Taxon
- sugarcanee1
- Interactor
- Diatraea saccharalisDiatraea saccharalise1pest
- Outcome
- correlation between percent parasitism and host population densitye0
- Direction
- not in the field teste0
- Setting
- field teste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“correlation between percent parasitism and host population density was detected in screen cage experiments but not in the field test”
e1“sugarcane borer, Diatraea saccharalis (F.)”