Resistance Mechanisms of Fall Armyworm to Insecticides
Author Information
Author(s): Posos-Parra Omar Alejandro, Pittendrigh Barry R., Wise John C., DiFonzo Christina, Patterson Eric, Mota-Sanchez David
Primary Institution: Michigan State University
Hypothesis
How is resistance to pyrethroid insecticides inherited in fall armyworm populations from Puerto Rico?
Conclusion
The study found that fall armyworm has developed high levels of resistance to pyrethroids, which is partially inherited and linked to specific detoxification enzymes.
Supporting Evidence
- The resistant strain showed a 62-fold resistance ratio for esfenvalerate and a 15-fold ratio for deltamethrin compared to the susceptible strain.
- Resistance was found to be incompletely dominant for both insecticides.
- Detoxification enzymes were identified as key factors in the resistance mechanisms.
Takeaway
Fall armyworms in Puerto Rico are getting better at surviving insecticides, and this ability is passed down to their babies, making it harder to control them.
Methodology
The study involved bioassays to assess resistance levels and inheritance patterns in fall armyworm populations, comparing a resistant strain from Puerto Rico with a susceptible strain.
Limitations
The study did not perform backcross tests to further clarify the genetic basis of resistance.
Participant Demographics
The study focused on fall armyworm populations from Puerto Rico.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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