Impact of Predation on Native Lady Beetle Eggs in Soybean Fields
Author Information
Author(s): Mary M. Gardiner, Matthew E. O'Neal, Douglas A. Landis
Primary Institution: Michigan State University
Hypothesis
Native coccinellid decline is due to enhanced interference competition via intraguild egg and larval predation.
Conclusion
The study found that both native and exotic predators contribute to the decline of native coccinellids through egg predation, influenced by the surrounding landscape structure.
Supporting Evidence
- 60.7% of egg masses were attacked by predators within 48 hours.
- 43.0% of available eggs were consumed in the same timeframe.
- Predator abundance was greater in soybean fields within diverse landscapes.
Takeaway
This study shows that ladybug eggs are eaten by other bugs, and where the fields are located affects how many eggs get eaten.
Methodology
The study measured egg predation in soybean fields in Michigan and Iowa using sentinel egg masses and analyzed the influence of landscape structure.
Potential Biases
Potential bias in predator identification due to sampling methods.
Limitations
The study may not account for all potential predators and the effects of scavenging on egg loss.
Participant Demographics
Soybean fields in Michigan and Iowa.
Statistical Information
P-Value
p<0.001
Statistical Significance
p<0.001
Digital Object Identifier (DOI)
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