Abstract
The extensive use of synthetic pesticides has created considerable concern for both human health and the environment, which has prompted the search for safer alternatives, such as the resin of guayule (Parthenium argentatum). Thus, in the present study, we aimed to test the biopesticide activity of crude guayule resin and three derived fractions and compare them to reference products that act against four of the most economically significant plant pests: Tetranychus urticae, Bemisia tabaci, Myzus persicae and Frankliniella occidentalis. None of the guayule products caused plant damage. The crude guayule resin and the hexane and ethyl acetate fractions displayed moderate to high contact mortality against T. urticae and B. tabaci, as well as moderate to high antifeedant activity against T. urticae, B. tabaci and M. persicae. No significant activity was observed against F. occidentalis. A correlation analysis of the activity and fraction composition revealed that guayulins C and D, isoargentatins A and B, argentatins A, B and D and an unknown compound C6 were likely responsible for the contact mortality. By contrast, the antifeedant activity appeared to be caused by guayulins A and B against T. urticae and B. tabaci and by guayulins C and D and argentatin B against M. persicae. The feeding reduction in F. occidentalis was associated with an unknown compound C2 and argentatin C. Therefore, guayule appears to be a promising novel biopesticide.
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Claims 9
Claim · model-written summary
None of the guayule products caused plant damage.
Not reportedDirection
Verbatim
e0“None of the guayule products caused plant damage.”
t0“Guayule”
Claim · model-written summary
Crude guayule resin and hexane and ethyl acetate fractions caused moderate to high contact mortality against T. urticae and B. tabaci.
- Taxon
- Guayulet0
- Treatment
- crude guayule resin and the hexane and ethyl acetate fractionse0
- Interactor
- T. urticae
.jpg?width=60)
Tetranychus urticaee0pest - Second interactor
- B. tabaci
Bemisia tabacie0pest - Outcome
- contact mortality against T. urticae and B. tabacie0
- Direction
- moderate to highe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“The crude guayule resin and the hexane and ethyl acetate fractions displayed moderate to high contact mortality against T. urticae and B. tabaci”
t0“Guayule”
Claim · model-written summary
The resin and fractions had moderate to high antifeedant activity against three pests.
- Taxon
- Guayulet0
- Interactor
- T. urticaeTetranychus urticaee0pest
- Second interactor
- B. tabaciBemisia tabacie0pest
- Outcome
- antifeedant activity against T. urticae, B. tabaci and M. persicaee0
- Direction
- moderate to highe0
- Qualifier
- M. persicaee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“moderate to high antifeedant activity against T. urticae, B. tabaci and M. persicae”
t0“Guayule”
Claim · model-written summary
No significant activity was observed against F. occidentalis.
- Taxon
- Guayulet0
- Interactor
- F. occidentalis
Frankliniella occidentalise0pest - Outcome
- activitye0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No significant activity was observed against F. occidentalis.”
t0“Guayule”
Claim · model-written summary
Several resin compounds were likely responsible for contact mortality.
Not reportedDirection
Verbatim
e0“guayulins C and D, isoargentatins A and B, argentatins A, B and D and an unknown compound C6 were likely responsible for the contact mortality”
t0“Guayule”
Claim · model-written summary
Guayulins A and B appeared to cause antifeedant activity against T. urticae and B. tabaci.
- Taxon
- Guayulet0
- Interactor
- T. urticaeTetranychus urticaee0pest
- Second interactor
- B. tabaciBemisia tabacie0pest
- Compound
- guayulins A and Be0
- Outcome
- antifeedant activitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“antifeedant activity appeared to be caused by guayulins A and B against T. urticae and B. tabaci”
t0“Guayule”
Claim · model-written summary
Guayulins C and D and argentatin B appeared to cause antifeedant activity against M. persicae.
- Taxon
- Guayulet0
- Interactor
- M. persicae
Myzus persicaee0pest - Compound
- guayulins C and D and argentatin Be0
- Outcome
- M. persicaee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“by guayulins C and D and argentatin B against M. persicae”
t0“Guayule”
Claim · model-written summary
Feeding reduction in F. occidentalis was associated with compound C2 and argentatin C.
- Taxon
- Guayulet0
- Interactor
- F. occidentalisFrankliniella occidentalise0pest
- Compound
- an unknown compound C2 and argentatin Ce0
- Outcome
- feeding reduction in F. occidentalise0
- Direction
- reductione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The feeding reduction in F. occidentalis was associated with an unknown compound C2 and argentatin C.”
t0“Guayule”
Claim · model-written summary
Guayule appears promising as a novel biopesticide.
Verbatim
e0“guayule appears to be a promising novel biopesticide”
t0“Guayule”