In Situ Processing and Efficient Environmental Detection (iSPEED) of tree pests and pathogens using point-of-use...

Area of Science:

• Environmental Science
• Molecular Biology
• Ecology

Background:

• Global trade and climate change drive invasive species, pests, and pathogens, necessitating effective monitoring.
• Early detection is critical for mitigating ecological damage and preventing widespread infestations.
• Molecular diagnostics, particularly DNA testing, are vital for accurate identification but often require lab infrastructure.

Purpose of the Study:

• To develop a cost-effective, efficient, point-of-use DNA testing system for remote environmental surveillance.
• To create a portable solution for real-time detection of forest pests and pathogens.
• To validate the accuracy and field applicability of the developed system.

Main Methods:

• Development of a real-time Polymerase Chain Reaction (PCR) system for on-site use.
• Implementation of a simple, crude buffer-based DNA extraction protocol.
• Utilization of lyophilized, pre-made reaction mixes for room-temperature stability.
• Testing with known forest pathogens (fungi, oomycete) and insect pests.

Main Results:

• Successful DNA identification from diverse sample types (leaves, spores, insect parts).
• Demonstrated accuracy with no false positives or negatives across all tested organisms.
• Confirmed shelf-life stability of lyophilized reagents for one year at room temperature.
• Field tests with portable thermocyclers validated the system's suitability for remote locations.

Conclusions:

• The in Situ Processing and Efficient Environmental Detection (iSPEED) system provides accurate, rapid, backpack-portable DNA testing for field applications.
• This technology addresses the need for efficient, cost-effective, point-of-use diagnostics in environmental monitoring.
• iSPEED facilitates early detection and surveillance of invasive forest pests and pathogens, aiding in their management.