Abstract
The impact of straw mulch, esfenvalerate insecticide and Bt biological insecticide on Colorado potato beetle, Leptinotarsa decemlineata (Say), natural enemies of the pest, potato plant growth and yield, were studied at the O'Neall and Pinney Purdue farms in 1992 and 1993. The counts of first plus second, and third plus fourth instars, adults, percentage of potatoes that had larvae or adult beetles on them as well as rating of damage by the beetle, based on a 1 to 5 rating which increased with plant damage level, was lower on mulched than on non mulched plots on most of the sampling dates. Esfenvalerate provided the best protection against the beetles while Bt provided protection that was intermediate between esfenvalerate and the control. Mulch and esfenvalerate treated plots had taller plant than the control plants. Indigenous predators of the beetle, that is, Colleomegilla maculata (DeGeer), Coccinella septempunctata (L), Lebia grandis Hentz, Podisus maculiventris (Say), and Perillus biculatus (F.) were more abundant on non mulched than on mulched potato plots, and on Bt and control plots than on esfenvalerate plots. The spatial distribution of the beetle predators followed that of the beetle hosts. This finding suggests that a combination of straw mulch and Bt could be used to sufficiently suppress the Colorado potato beetle population when the beetle infestation is low. Mulch also kept the soil cool and moist, resulting in improved plant growth and crop yield. A mulch and Bt treatment combination would not affect the natural enemies directly, thus the environment would remain free of undesirable residues.
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Claims 10
Claim · model-written summary
Mulched potato plots generally had fewer beetle stages and less beetle damage than unmulched plots.
- Taxon
- potatoes
Solanum tuberosume0 - Treatment
- mulchede0
- Interactor
- beetlee0pest
- Outcome
- counts of first plus second, and third plus fourth instars, adultse0
- Direction
- lowere0
- Qualifier
- most of the sampling datese0
- Comparator
- non mulched plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The counts of first plus second, and third plus fourth instars, adults, percentage of potatoes that had larvae or adult beetles on them as well as rating of damage by the beetle, based on a 1 to 5 rating which increased with plant damage level, was lower on mulched than on non mulched plots on most of the sampling dates”
Claim · model-written summary
Esfenvalerate gave the best beetle protection.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- Esfenvaleratee0
- Interactor
- beetlesColeopterae0pest
- Outcome
- best protection against the beetlese0
- Direction
- beste0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Esfenvalerate provided the best protection against the beetles while Bt provided protection that was intermediate between esfenvalerate and the control”
t0“potato beetle”
Claim · model-written summary
Bt protection against beetles was intermediate between esfenvalerate and control.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- Bte0
- Interactor
- beetlet0pest
- Outcome
- protectione0
- Direction
- intermediatee0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bt provided protection that was intermediate between esfenvalerate and the control”
t0“potato beetle”
Claim · model-written summary
Mulched plots had taller potato plants than controls.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- Mulche0
- Outcome
- plante0
- Direction
- tallere0
- Comparator
- control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mulch and esfenvalerate treated plots had taller plant than the control plants”
t0“potato beetle”
Claim · model-written summary
Esfenvalerate treated plots had taller potato plants than controls.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- esfenvaleratee0
- Outcome
- plante0
- Direction
- tallere0
- Comparator
- control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mulch and esfenvalerate treated plots had taller plant than the control plants”
t0“potato beetle”
Claim · model-written summary
Beetle predators were more abundant on non mulched potato plots.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- non mulchede0
- Interactor
- beetlee0pest
- Outcome
- Indigenous predators of the beetlee0
- Direction
- more abundante0
- Comparator
- mulched potato plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Indigenous predators of the beetle, that is, Colleomegilla maculata (DeGeer), Coccinella septempunctata (L), Lebia grandis Hentz, Podisus maculiventris (Say), and Perillus biculatus (F.) were more abundant on non mulched than on mulched potato plots”
Claim · model-written summary
Predators were more abundant on Bt and control plots than on esfenvalerate plots.
- Taxon
- potatoSolanum tuberosumt0
- Outcome
- Indigenous predators of the beetlee1
- Comparator
- esfenvalerate plotse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“on Bt and control plots than on esfenvalerate plots”
e1“Indigenous predators of the beetle”
t0“potato beetle”
Claim · model-written summary
Predator spatial distribution followed that of beetles.
- Taxon
- potatoSolanum tuberosumt0
- Interactor
- beetlee0pest
- Outcome
- spatial distribution of the beetle predatorse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The spatial distribution of the beetle predators followed that of the beetle hosts”
t0“potato beetle”
Claim · model-written summary
Mulch improved potato growth and crop yield while keeping soil cool and moist.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- Mulche0
- Outcome
- plant growth and crop yielde0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mulch also kept the soil cool and moist, resulting in improved plant growth and crop yield”
t0“potato beetle”
Claim · model-written summary
The authors propose straw mulch with Bt for low beetle infestations.
- Taxon
- potatoSolanum tuberosumt0
- Interactor
- Colorado potato beetle
Leptinotarsa decemlineatae0pest - Outcome
- a combination of straw mulch and Bt could be used to sufficiently suppress the Colorado potato beetle populatione0
- Qualifier
- when the beetle infestation is lowe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a combination of straw mulch and Bt could be used to sufficiently suppress the Colorado potato beetle population when the beetle infestation is low”
t0“potato beetle”
The same questions in other papers
mulching · yield · Solanum tuberosum (potato)Results differ
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- no effect
- no effect
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See all 64 papers →mulching · pest · Solanum tuberosum (potato)Positive and negative results
11 papers in the same direction as this paper · 4 in the opposite direction
- no effect
- negative
- negative
12 papers more in this group
See all 16 papers →transgenic · control · Solanum tuberosum (potato)Results agree
2 papers in the same direction as this paper
- positive
- positive
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.