In the highlands of East Africa, potatoes are a lifeline for millions of smallholder farmers—but late blight disease has long been their greatest enemy. This aggressive pathogen can destroy an entire field in just weeks, forcing farmers in Kenya and Uganda to spray fungicides 10–15 times per season, and even more frequently during rainy periods. These chemical treatments now account for 15–25% of total production costs, eating away at already slim profits while threatening environmental health and farmers’ well-being. As Peter Njuguna, a potato grower from Njoro, Kenya, explains, the pressure creates a vicious cycle: the more they spray, the higher their costs, yet they cannot afford to stop, or they lose everything. With over a million households depending on this crop for food and income, the situation has become critical.
The solution, however, may lie in the potato’s ancient origins. Scientists from the International Potato Center (CIP) are turning to wild potato species native to the Andes in South America, where more than 150 wild relatives still thrive with remarkable natural resilience. Through the Crop Trust’s BOLD project, researchers are crossbreeding these wild varieties—many of which possess natural resistance to blight, drought, heat, and cold—with commercial cultivars. The goal is to develop new hybrids that combine disease resistance with high yield and quality. Notably, Kenyan farmers are actively involved in field trials, evaluating new lines on their own land and selecting those best suited to local conditions and market needs. This participatory approach bridges the gap between science and practice, helping farmers reduce pesticide use, cut costs, lower risks, and boost incomes. If successful, these wild-gene potatoes could break the chemical dependency trap, offering a more sustainable future not only for East Africa but for potato farming worldwide.
