Maize in Portugal: phytosanitary challenges and new emerging threats

Maize continues to be the Portugal's most important arable crop, The sector has a significant impact on food safety and the national agri-food industry. Involving thousands of producers and generating tens of millions of euros a year, the sector is currently facing increasingly complex phytosanitary challenges.

Among already known pests and emerging diseases, there are risks ranging from cartridge caterpillar until Maize Rugose Dwarfism Virus (MRDV), The presence of this virus is increasing in Portugal. This virus, transmitted by the corn leafhopper, can seriously compromise production and is found in the climate change increasingly favorable conditions for its spread.

However, it's not just MRDV that's worrying. There are new threats that require vigilance, such as the coleopter Diabrotica virgifera or the MDMV virus (Maize Dwarf Mosaic Virus), already detected in neighboring countries, and also toxic weeds, such as the winter fig (Datura stramonium), which in addition to impacting productivity pose public health risks.

Faced with this reality, the answer is integrated and sustainable strategies, matching:

• crop rotation and good agricultural practices;
• careful use of insecticides to avoid resistance and environmental impacts;
• resistant or tolerant varieties, where available;
• research and technological innovation, including new digital tools for early detection.

As the InnovPlantProtect researcher points out, Nuno Faria, in the article entitled “The main emerging pests and diseases of the maize crop in Portugal”, available in the August edition of Voz do Campo magazine: “The phytosanitary panorama of maize in Portugal requires continuous vigilance, investment in research and the application of integrated and sustainable strategies capable of responding to an increasingly dynamic and unpredictable reality.”

To find out more about the main current risks and mitigation measures, read the full article published in the August issue of Voz do Campo magazine (pages 88-89), available on newsstands and online.