Abstract
Spodoptera frugiperda is a widely distributed insect pest that causes major economic losses in various crops, particularly maize. On the other hand, Beauveria bassiana is an entomopathogenic fungus that establishes symbiotic associations with many plants and contributes to tolerance against biotic and abiotic stresses. In the present work, in laboratory experiments, the effects of the B. bassiana strain GHA, in addition to a native strain (PTG4), delivered via seed treatment in maize seedlings, were evaluated on S. frugiperda growth, development, and mortality. We inoculated maize seeds with 1 × 106B. bassiana blastospores; then these seeds were germinated and grown to seedlings under growth chamber conditions. Third-instar S. frugiperda larvae were allowed to feed on B. bassiana-treated and -untreated (negative control) seedlings until reaching the sixth instar and transferred to an artificial diet until reaching adult stage. Results showed that larvae feeding on B. bassiana strain PTG4-treated plants prolonged their larval stage. Furthermore, feeding on plants treated with B. bassiana strains yielded fewer S. frugiperda male moths compared with feeding with the untreated control plants. Under field conditions, 1 × 106 (first trial) and 1 × 108 (second trial) of B. bassiana (GHA strain) blastospores were used for corn seed inoculation. In the first field trial, there were a higher number of larvae in the negative control plants compared to those in the plants treated with B. bassiana. No larvae were found in negative control and B. bassiana-treated plants in the second field trial. In conclusion, seed treatment with B. bassiana in maize reduced S. frugiperda infestation of maize plants in field trials. S. frugiperda development was also affected in laboratory trials.
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Claims 6
Claim · model-written summary
Larvae feeding on B. bassiana strain PTG4-treated maize plants had a prolonged larval stage.
- Treatment
- B. bassiana strain PTG4e1
- Interactor
- Spodoptera frugiperda
.jpg?width=60)
Spodoptera frugiperdae0pest - Second interactor
- B. bassiana
Beauveria bassianae1biocontrol_agent - Outcome
- larval stagee1
- Direction
- prolongede1
- Comparator
- untreated (negative control) seedlingse7
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
t0“Zea mays L.”
e0“Spodoptera frugiperda is a widely distributed insect pest”
e1“Results showed that larvae feeding on B. bassiana strain PTG4-treated plants prolonged their larval stage”
e7“feed on B. bassiana-treated and -untreated (negative control) seedlings”
Claim · model-written summary
Feeding on B. bassiana-treated maize plants yielded fewer S. frugiperda male moths than feeding on untreated control plants.
- Treatment
- B. bassiana strainse2
- Interactor
- S. frugiperdaSpodoptera frugiperdae2pest
- Second interactor
- B. bassianaBeauveria bassianae2biocontrol_agent
- Outcome
- S. frugiperda male mothse2
- Direction
- fewere2
- Comparator
- untreated control plantse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Zea mays L.”
e2“feeding on plants treated with B. bassiana strains yielded fewer S. frugiperda male moths compared with feeding with the untreated control plants”
Claim · model-written summary
In the first field trial there were more larvae on negative control plants than on B. bassiana-treated plants.
- Treatment
- B. bassianae3
- Outcome
- number of larvaee3
- Direction
- highere3
- Comparator
- negative control plantse3
- Setting
- first field triale3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Zea mays L.”
e3“In the first field trial, there were a higher number of larvae in the negative control plants compared to those in the plants treated with B. bassiana”
Claim · model-written summary
In the second field trial no larvae were found on negative control or B. bassiana-treated plants.
- Treatment
- B. bassianae4
- Outcome
- larvaee4
- Direction
- no_changeinferrede4
- Comparator
- negative controle4
- Setting
- second field triale4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Zea mays L.”
e4“No larvae were found in negative control and B. bassiana-treated plants in the second field trial”
Claim · model-written summary
Seed treatment with B. bassiana reduced S. frugiperda infestation of maize in field trials.
- Treatment
- seed treatment with B. bassianae5
- Interactor
- S. frugiperdaSpodoptera frugiperdae5pest
- Second interactor
- B. bassianaBeauveria bassianae5biocontrol_agent
- Outcome
- S. frugiperda infestatione5
- Direction
- reducede5
- Comparator
- negative control plantse3
- Setting
- field trialse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Zea mays L.”
e5“In conclusion, seed treatment with B. bassiana in maize reduced S. frugiperda infestation of maize plants in field trials”
e3“In the first field trial, there were a higher number of larvae in the negative control plants compared to those in the plants treated with B. bassiana”
Claim · model-written summary
S. frugiperda development was affected by B. bassiana seed treatment in laboratory trials.
- Treatment
- B. bassianae5
- Interactor
- S. frugiperdaSpodoptera frugiperdae6pest
- Second interactor
- B. bassianaBeauveria bassianae5biocontrol_agent
- Outcome
- S. frugiperda developmente6
- Comparator
- untreated (negative control) seedlingse7
- Setting
- laboratory trialse6
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Zea mays L.”
e6“S. frugiperda development was also affected in laboratory trials”
e7“feed on B. bassiana-treated and -untreated (negative control) seedlings”
e5“We inoculated maize seeds with 1 × 106B. bassiana blastospores”
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See all 7 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.