Portable Rice Disease Spores Capture and Detection Method Using Diffraction Fingerprints on Microfluidic Chip.

Area of Science:

• Agricultural Science
• Biotechnology
• Optical Engineering

Background:

• Fungal spores are responsible for 90% of crop diseases, significantly impacting global food security.
• Accurate and early detection of crop disease spores is crucial for effective disease management and prevention.
• Existing detection methods can be expensive and lack portability, limiting their widespread application.

Purpose of the Study:

• To develop a novel, cost-effective, and portable method for detecting crop disease spores.
• To utilize lensfree diffraction fingerprint technology combined with microfluidics for spore identification.
• To quantify spores using specific diffraction pattern parameters for improved accuracy.

Main Methods:

• A lensless diffraction detection platform was designed, incorporating a microfluidic chip for spore enrichment and isolation.
• Partially coherent light was used to generate diffraction fingerprints of spores, distinguishing them from impurities.
• Spore quantification was achieved using Peak to Center ratio (PCR) and Peak to Valley ratio (PVR) parameters.

Main Results:

• The developed device achieved a high correlation coefficient (0.99) with microscopic identification for rice blast spores.
• The average error rate of the proposed spore detection device was as low as 5.91%.
• The compact device (4 cm × 4 cm × 5 cm) costs less than $150, making it significantly more affordable than existing equipment.

Conclusions:

• The lensfree diffraction fingerprint and microfluidic chip method provides an accurate and efficient means for crop disease spore detection.
• The low cost and small size of the device facilitate its potential for widespread adoption as an early warning system for crop diseases.
• This technology offers a promising solution for enhancing food security through improved crop disease management.