Skip to main content
Entomology 2023 Main banner
Bayer
Icon Legend
This session is not in your schedule.
This session is in your schedule. Click again to remove it.
Presentation Icons
In-Person
In-Person
On-Demand
On-Demand
Student Competition
Student Competition
Poster
Poster
Ticketed Event
Ticketed Event
ViewAttendees 2

Student 10-Minute Paper

Physiology, Biochemistry, and Toxicology

Student Competition

Student

Grad Competition PBT: Biocontrol and IPM

Balancing pest control and preservation: assessing the selectivity of bioinsecticides for sustainable agriculture

Monday, November 6, 2023
10:42 AM - 10:54 AM ET
Location: Gaylord National Resort & Convention Center, National Harbor 12
In-Person Student Competition

 


Pest management should align with the principles of agricultural sustainability, which include the integration of ecological approaches such as the preservation of natural enemies. An effective way to promote this sustainability is through the use of bioinsecticides derived from secondary plant metabolism. In this context, the objective of this study was to assess the toxicity of the extract from the Annona montana plant on the Spodoptera frugiperda (Lepidoptera: Noctuidae) pest and its selectivity on the Doru luteipes (Dermaptera: Forficulidae) predator. To achieve these goals, lethal concentration (LC) bioassays of the A. montana extract on S. frugiperda were initially conducted. Subsequently, the crude extract was subjected to bioassay-guided fractionation to obtain the most active fraction. Then, selectivity bioassays were performed to evaluate lethal and sublethal effects on the predator. The lethal concentration of the A. montana extract was 0.35 g/mL (LC50) and 1.64 g/mL (LC90), respectively. The methanolic fraction was the most toxic, causing mortality in 81% of the caterpillars. The methanolic fraction of A. montana did not affect the survival of D. luteipes, whereas the commercial insecticide Chlorantraniliprole resulted in higher mortality in all nymphal stages. The same pattern was observed in predation capacity, where D. luteipes in contact with Chlorantraniliprole preyed on only 40.5% of the caterpillars, displaying distinct behavior characterized by shorter distances and slower walking speeds. These results demonstrate the promising potential of the A. montana bioinsecticide to integrate pest control strategies in sustainable agricultural systems.