Abstract
Abstract An overview of data from five research groups participating in a 3-year pilot test on the efficacy of foliar applications of Beauveria bassiana (Balsamo) Vuillemin for control of Colorado potato beetle, Leptinotarsa decemlineata (Say), populations in the northern United States is presented. Four treatments were used at each site: high and low B . bassiana dosages (5 × 10 13 colony forming units (CFU) per hectare (ha) and 5 × 10 12 CFU/ha), the recommended insecticide for each region, and an untreated check. The primary response variable was potato yield. For analyses considering test sites as replicates, during all 3 years the highest yields were produced in plots treated with insecticides. Within test sites, yields from plots receiving B . bassiana applications were greater than control plot yields in 8 of 24 trials but in only two of these instances, B . bassiana plot yields also did not differ from insecticide plot yields. Evaluating 1983 data from all states together, no differences were found between either high or low B . bassiana treatments and controls. The 1983 study design allowed no plot replication within states. In 1985, an altered plot design providing within-site replication demonstrated increased yield with increased dosage of B . bassiana when initial egg density was used as a covariate. Potato yields greater than control plot yields were noted with a minimum of 5.39 and 6.62 × 10 11 CFU/ha B . bassiana . The lowest B . bassiana concentration producing yields not significantly different from insecticide plot yields was 6.62 × 10 12 CFU/ha (Rhode Island, 1984). Defoliation ratings did not differ between B . bassiana treatments and controls in 1984 and 1985, although variability was found between yields.
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Claims 9
Claim · model-written summary
Insecticide plots had the highest potato yields across all three years.
- Taxon
- potato
Solanum tuberosumt0 - Treatment
- insecticidese0
- Outcome
- yieldse0
- Direction
- higheste0
- Qualifier
- all 3 yearse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“during all 3 years the highest yields were produced in plots treated with insecticides”
t0“POTATO”
Claim · model-written summary
Beauveria applications increased potato yield over controls in 8 of 24 trials.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- B . bassiana applicationse0
- Interactor
- B . bassiana
Beauveria bassianae0biocontrol_agent - Outcome
- yieldse0
- Direction
- greatere0
- Value
- 8 of 24 trialse0
- Comparator
- control plote0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yields from plots receiving B . bassiana applications were greater than control plot yields in 8 of 24 trials”
t0“POTATO”
Claim · model-written summary
In two trials, Beauveria plot yields did not differ from insecticide plot yields.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- B . bassianae0
- Interactor
- B . bassianaBeauveria bassianae0biocontrol_agent
- Outcome
- yieldse0
- Direction
- did not differe0
- Value
- twoe0
- Comparator
- insecticide plote0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in only two of these instances, B . bassiana plot yields also did not differ from insecticide plot yields”
t0“POTATO”
Claim · model-written summary
In pooled 1983 data, the high Beauveria dose did not differ from controls.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- highe0
- Interactor
- B . bassianaBeauveria bassianae0biocontrol_agent
- Outcome
- no differencese0
- Direction
- no differencese0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Evaluating 1983 data from all states together, no differences were found between either high or low B . bassiana treatments and controls”
t0“POTATO”
Claim · model-written summary
In pooled 1983 data, the low Beauveria dose did not differ from controls.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- low B . bassiana treatmentse0
- Interactor
- B . bassianaBeauveria bassianae0biocontrol_agent
- Outcome
- no differencese0
- Direction
- no differencese0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Evaluating 1983 data from all states together, no differences were found between either high or low B . bassiana treatments and controls”
t0“POTATO”
Claim · model-written summary
In 1985, potato yield increased with Beauveria dosage when initial egg density was included as a covariate.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- increased dosage of B . bassianae0
- Interactor
- B . bassianaBeauveria bassianae0biocontrol_agent
- Outcome
- yielde0
- Direction
- increasede0
- Qualifier
- when initial egg density was used as a covariatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased yield with increased dosage of B . bassiana when initial egg density was used as a covariate”
t0“POTATO”
Claim · model-written summary
Potato yields exceeded controls at the reported minimum Beauveria doses.
- Taxon
- PotatoSolanum tuberosume0
- Treatment
- B . bassianae0
- Interactor
- B . bassianaBeauveria bassianae0biocontrol_agent
- Outcome
- yieldse0
- Direction
- greatere0
- Value
- 5.39 and 6.62 × 10 11 CFU/hae0
- Comparator
- control plote0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Potato yields greater than control plot yields were noted with a minimum of 5.39 and 6.62 × 10 11 CFU/ha B . bassiana”
Claim · model-written summary
The lowest Beauveria concentration producing potato yield comparable to insecticide plots was 6.62 × 10 12 CFU/ha.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- B . bassianae0
- Interactor
- B . bassianaBeauveria bassianae0biocontrol_agent
- Outcome
- yieldse0
- Direction
- not significantly differente0
- Value
- 6.62 × 10 12 CFU/hae0
- Comparator
- insecticide plote0
- Setting
- Rhode Islande0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The lowest B . bassiana concentration producing yields not significantly different from insecticide plot yields was 6.62 × 10 12 CFU/ha (Rhode Island, 1984)”
t0“POTATO”
Claim · model-written summary
Defoliation ratings did not differ between Beauveria treatments and controls in 1984 and 1985.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- B . bassiana treatmentse0
- Interactor
- B . bassianaBeauveria bassianae0biocontrol_agent
- Outcome
- Defoliation ratingse0
- Direction
- did not differe0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Defoliation ratings did not differ between B . bassiana treatments and controls in 1984 and 1985”
t0“POTATO”
The same questions in other papers
insecticide · yield · Solanum tuberosum (potato)Results differ
21 papers in the same direction as this paper · 9 in the opposite direction · 1 reporting no difference from an alternative
- positive
- no effect
- no effect
28 papers more in this group
See all 32 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.