Abstract
Colorado potato beetle, Leptinotarsa decemlineata (Say), population trends were monitored in potatoes under different pest management and cultural regimes. Four cultural practices (straw mulch, spent mushroom compost, both mulch and compost, and conventional practices without mulch or compost) were used as subplots within main plots representing 3 pest management practices. In 1992, beetles were managed by hand removal until July, and the 3 treatments were removal without soil fumigation, no removal without fumigation, and no removal with fumigation. In 1993 and 1994, beetles were managed by use of insecticides, and the 3 treatments were insecticides with soil fumigation, insecticides without fumigation, and no insecticides with fumigation. Straw mulch reduced the density per square meter of adults and large larvae in plots without beetle management in 1992 and 1994, and the density of adults in insecticide-treated plots in 1993. Defoliation was lower in mulched subplots without beetle management in 1992 and 1994, and leaf area (1992) or ground cover (1994) was increased in these treatments, but yield was not affected. Compost increased leaf area and yield in 1992, and increased the density of adults and egg masses in that year, but generally had minor effects on beetle density and varying effects on yield. Fumigation significantly decreased yield in 1992 and 1994, and it had no effect on yield in 1993. Any benefits of fumigation in mitigating disease were offset by the earlier peak in density of large larvae in 1992, and the greater density of adults in 1993 and 1994 in fumigated plots compared with plots without fumigation.
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Claims 12
Claim · model-written summary
Straw mulch reduced adult and large-larva beetle density without beetle management in 1992 and 1994.
- Taxon
- potatoes
Solanum tuberosume1 - Treatment
- Straw mulche0
- Interactor
- Leptinotarsa decemlineata
Leptinotarsa decemlineatae1pest - Outcome
- density per square meter of adults and large larvaee0
- Direction
- reducede0
- Qualifier
- plots without beetle management in 1992 and 1994e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Straw mulch reduced the density per square meter of adults and large larvae in plots without beetle management in 1992 and 1994”
e1“Colorado potato beetle, Leptinotarsa decemlineata (Say), population trends were monitored in potatoes”
Claim · model-written summary
Straw mulch reduced adult beetle density in insecticide-treated plots in 1993.
- Taxon
- potatoesSolanum tuberosume1
- Treatment
- Straw mulche0
- Interactor
- Leptinotarsa decemlineataLeptinotarsa decemlineatae1pest
- Outcome
- density of adultse0
- Direction
- reducede0
- Qualifier
- insecticide-treated plots in 1993e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Straw mulch reduced the density per square meter of adults and large larvae in plots without beetle management in 1992 and 1994, and the density of adults in insecticide-treated plots in 1993”
e1“Colorado potato beetle, Leptinotarsa decemlineata (Say), population trends were monitored in potatoes”
Claim · model-written summary
Mulch reduced defoliation without beetle management in 1992 and 1994.
- Taxon
- potatoesSolanum tuberosume1
- Treatment
- mulched subplotse0
- Outcome
- Defoliatione0
- Direction
- lowere0
- Qualifier
- without beetle management in 1992 and 1994e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Defoliation was lower in mulched subplots without beetle management in 1992 and 1994”
e1“population trends were monitored in potatoes”
Claim · model-written summary
Mulch increased potato leaf area in 1992 and ground cover in 1994.
- Taxon
- potatoesSolanum tuberosume2
- Treatment
- mulched subplotse1
- Outcome
- leaf area (1992) or ground cover (1994)e0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leaf area (1992) or ground cover (1994) was increased in these treatments”
e1“mulched subplots without beetle management in 1992 and 1994”
e2“population trends were monitored in potatoes”
Claim · model-written summary
Mulch did not affect potato yield.
- Taxon
- potatoesSolanum tuberosume2
- Treatment
- mulched subplotse1
- Outcome
- yielde0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yield was not affected”
e1“mulched subplots without beetle management in 1992 and 1994”
e2“population trends were monitored in potatoes”
Claim · model-written summary
Compost increased potato leaf area and yield in 1992.
- Taxon
- potatoesSolanum tuberosume1
- Treatment
- Composte0
- Outcome
- leaf area and yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compost increased leaf area and yield in 1992”
e1“population trends were monitored in potatoes”
Claim · model-written summary
Compost increased adult beetle and egg-mass density in 1992.
- Taxon
- potatoesSolanum tuberosume1
- Treatment
- Composte0
- Interactor
- Leptinotarsa decemlineataLeptinotarsa decemlineatae1pest
- Outcome
- density of adults and egg massese0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compost increased leaf area and yield in 1992, and increased the density of adults and egg masses in that year”
e1“Colorado potato beetle, Leptinotarsa decemlineata (Say), population trends were monitored in potatoes”
Claim · model-written summary
Compost generally had minor effects on beetle density and variable effects on potato yield.
- Taxon
- potatoesSolanum tuberosume1
- Treatment
- Composte0
- Interactor
- Leptinotarsa decemlineataLeptinotarsa decemlineatae1pest
- Outcome
- beetle density and varying effects on yielde0
- Direction
- minor effectse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compost increased leaf area and yield in 1992, and increased the density of adults and egg masses in that year, but generally had minor effects on beetle density and varying effects on yield”
e1“Colorado potato beetle, Leptinotarsa decemlineata (Say), population trends were monitored in potatoes”
Claim · model-written summary
Fumigation significantly decreased potato yield in 1992 and 1994.
- Taxon
- potatoesSolanum tuberosume1
- Treatment
- Fumigatione0
- Outcome
- yielde0
- Direction
- decreasede0
- Qualifier
- 1992 and 1994e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fumigation significantly decreased yield in 1992 and 1994”
e1“population trends were monitored in potatoes”
Claim · model-written summary
Fumigation did not affect potato yield in 1993.
- Taxon
- potatoesSolanum tuberosume2
- Treatment
- Fumigatione1
- Outcome
- yielde0
- Direction
- no effecte0
- Qualifier
- in 1993e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it had no effect on yield in 1993”
e1“Fumigation significantly decreased yield in 1992 and 1994”
e2“population trends were monitored in potatoes”
Claim · model-written summary
Fumigation produced an earlier peak of large larvae in 1992.
- Taxon
- potatoesSolanum tuberosume2
- Treatment
- fumigated plotse1
- Interactor
- Leptinotarsa decemlineataLeptinotarsa decemlineatae2pest
- Outcome
- peak in density of large larvaee0
- Direction
- earliere0
- Comparator
- plots without fumigatione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“earlier peak in density of large larvae in 1992”
e1“in fumigated plots compared with plots without fumigation”
e2“Colorado potato beetle, Leptinotarsa decemlineata (Say), population trends were monitored in potatoes”
Claim · model-written summary
Fumigated plots had greater adult beetle density in 1993 and 1994.
- Taxon
- potatoesSolanum tuberosume1
- Treatment
- fumigated plotse0
- Interactor
- Leptinotarsa decemlineataLeptinotarsa decemlineatae1pest
- Outcome
- density of adultse0
- Direction
- greatere0
- Comparator
- plots without fumigatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“greater density of adults in 1993 and 1994 in fumigated plots compared with plots without fumigation”
e1“Colorado potato beetle, Leptinotarsa decemlineata (Say), population trends were monitored in potatoes”
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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.