Posts Tagged ‘disease’

Remote Sensing for phenotyping tar spot complex in maize

by Carolyn Cowan

Multispectral and thermal images taken by cameras on unmanned aerial vehicles (UAVs) are helping researchers to monitor the resistance of maize to foliar diseases.

A new study from researchers at the International Maize and Wheat Improvement Center (CIMMYT) can reduce challenges associated with plant disease assessment in the field. By deploying cameras mounted on unmanned aerial vehicles (UAVs) that capture image information from non-visible sections of the electromagnetic spectrum, the interdisciplinary team demonstrated the effectiveness of remote sensing technologies in maize disease phenotyping.    

“Plant disease resistance assessment in the field is becoming difficult because the breeders’ trials are becoming larger, the trials have to be conducted in multiple locations, and because sometimes there is a lack of highly trained personnel who can evaluate the diseases,” said Francelino Rodrigues, CIMMYT Precision Agriculture Specialist and co-lead author of the study. “In addition, the disease notes taken in the field by a human eye can vary from person to person depending on the persons’ experience.”

Preparing the UAV for radiometric calibration for multispectral flight over a maize tar spot complex screening trial. CIMMYT’s Agua Fria Experimental Station, Mexico. (Photo: Alexander Loladze/CIMMYT)

Amazing maize: International crop research benefits SSA

Striga damage - IITAResearch on maize improvement by international agricultural research centers and partners in SSA is increasing harvests in the region and enhancing farmers’ lives.

In Nigeria, farmers say that improved varieties are addressing constraints such as the parasitic weed Striga, drought, poor soil fertility and pests and diseases that limit productivity, reduce yield and make farming unattractive. For farmer Hajiya Hafsatu Riruwai the encounter with improved maize technologies last year brought a profound change to her life.