Why can plant diseases cause hunger in places with limited access to disease-control methods?

Plant diseases pose a severe threat to global food security, particularly in less-developed regions where access to disease-control methods is limited. In these areas, annual crop losses of 30 to 50 percent are not uncommon, and major outbreaks can lead to catastrophic famine, starvation, and mass migration.1

The vulnerability of these regions stems from several factors:

• Lack of Infrastructure: Effective management often requires advanced measures such as forecasting and warning services, which rely on analyzing environmental data like temperature and humidity to predict outbreaks.
• Economic Impact: When farmers lack the resources to implement chemical controls, resistant crop varieties, or specialized cultural practices, they are unable to mitigate the rapid spread of pathogens.21
• Dependence on Single Crops: Many communities rely heavily on specific crops for their primary food source. When a disease—such as the late blight that caused the Great Famine—destroys these staples, the result is immediate and widespread hunger.1

Ultimately, the inability to control these biological threats directly reduces food availability, driving up prices and destabilizing the economies of vulnerable nations.1