Rothamsted trap sniffs out disease

An automated spore trap which could revolutionise disease monitoring in agricultural crops has been developed.

This blue sky thinking comes as part of an AHDB project led by Rothamsted Research, and it can provide near real-time information on the presence of airborne spores. This could potentially help farmers better target fungicide applications.

Several DNA-based methods to detect airborne spores of key crop pathogens have also developed or improved in the project.

The ‘DNA auto spore trap’ – developed with the Burkard Manufacturing Company – is mains-powered and can issue regular alerts on the presence of spores that could affect nearby broad-acre crops.

It has capacity to sample high volumes of air and can collect tiny spores which it then 'disrupts' to release DNA for identification by a series of ‘in-trap’ laboratory tests. Results are then sent wirelessly to a server.

Jon West, who led the project at Rothamsted, said: “This technology is in its infancy, but its potential power is incredible. The trap can test for the presence of up to three different pathogens in the sample each day.

"Weather data, collected by an on-board met station, can also be sent by text every 10 minutes.”

New tests have been developed for pathogens such as pyrenopeziza brassicae (light leaf spot), sclerotinia sclerotiorum (sclerotinia stem rot), zymoseptoria tritici (septoria tritici), rhynchosporium species, oculimacula yallundae and o acuformis (eyespot), and alternaria solani (early blight).

Researchers have also developed tests to detect changes in fungicide insensitivity in the pathogen that causes septoria in wheat – zymoseptoria tritici. The tests, which can identify populations with reduced sensitivity to DMI and SDHI fungicides, can only be used in laboratories at present.

Catherine Garman, who manages disease research at AHDB, commented: “Automated spore trapping is no longer a futuristic prospect. Proof of concept has been established and the first commercial machines are likely to be available in the near future.”