A Virginia Tech researcher uses undergrads to help improve potato farming in the Andes

Undergraduate students are helping Jeff Alwang, a professor of agriculture and applied economics in Virginia Tech’s College of Agriculture and Life Sciences, work with potato farmers in Ecuador and Bolivia to improve their production.

These farmers are dealing with new challenges as population pressures have pushed people higher and higher up slopes in the Andes. Growing potatoes, a major staple, on precipitous mountainsides is a different endeavor than the farming their ancestors did on flat land at sea level.


Growing potatoes along the slopes of the Andes presents new challenges for Ecuadorian farmers. Growing potatoes along the slopes of the Andes presents new challenges for Ecuadorian farmers.

“I like to bring in undergrads because they are enthusiastic about research, especially in a developing country. They build important social and professional relationships with the project’s young host-country researchers, and they provide lots of hands and feet on the ground over a relatively short period — they help us get the research done,” Alwang said.

He and the students work with two large-scale projects in the Andes, one on integrated pest management and the other on sustainable agriculture and natural resource management.

“Andean farmers have grown potatoes for thousands of years, and they know how to do it,” Alwang said. Because of this rich knowledge, “It’s important that when we develop new practices and technologies, they fit in with the types of practices they normally do,” he said.

In Ecuador, more than 90,000 farmers grow potatoes on 60,000 hectares (or about 148,000 acres). Growing the tuber crop in the high Andes poses significant challenges. In addition to erosion, farmers deal with poor soil, erratic rainfall, and pests such as late blight (the fungal disease associated with the Irish potato famine), the Andean potato weevil, and the Central American tuber moth.

Alwang and a team of researchers introduced techniques to deal with these problems. To fight erosion, for example, farmers now use contour plowing, plant bushes and trees as barriers, create diversion ditches, take advantage of natural terracing, and intercrop annual and perennial plants in strips.

Farmers once sprayed pesticides on potato crops 14 times in a growing cycle. Today, with integrated pest management methods, they spray four times and use less toxic chemicals. Instead of growing potatoes continuously, which leads to pest buildup, farmers are now rotating crops.

Integrated pest management methods save money, too. In field trials, input costs such as pesticides and fertilizer were $600 to $800 per hectare on the plots managed by natural methods.

Producer groups and local government are participating in the project involving natural resource management. That has led to widespread acceptance of the recommendations. Vulnerable areas are no longer being continuously cropped. Local governments are assisting landowners in planting trees and perennials.


Jeff Alwang (left), professor of agricultural and applied economics, discusses the project with an undergraduate intern and a local partner scientist. Jeff Alwang (left), professor of agricultural and applied economics, discusses the project with an undergraduate intern and a local partner scientist.

Alwang’s experience in the region, including 13 years on the integrated pest management project and seven years on the sustainable agriculture and natural resource management project, has helped him earn the trust of the locals.

“Farmers say that in the past, a lot of researchers come, ask questions, leave, and the farmers never see anything,” he said. “We have a team that works regularly out in the site. They know each one of the farmers.”

That trust nets accurate information for researchers and a greater likelihood that the farmers will try a new technique, he said.

He has set up a program that engages undergraduates in the research. Every other year since 2007, Alwang has taken a group of six or seven undergraduates to Ecuador for six weeks of study and research. The students must know Spanish, take a preparatory course, write an essay outlining their objectives in participating and be physically fit enough to deal with extensive walking along steep slopes at 9,000 feet.

Upon arrival in Quito, the students spend two weeks in intensive Spanish courses. They wake up at 6 a.m. to either run or play basketball to acclimate themselves to the high altitudes they will be working at in the field.

Students learn to implement soil-conservation techniques in the high Andes and to earn the trust of their study subjects.

“We’ve had some farmers think that we were collecting taxes; they run from us sometimes,” said Lauren Moore, who earned a bachelor’s degree in international studies in spring 2011. But the benefits of the program are significant, she said. The mountain scenery is spectacular, and students gain confidence from their work.

“Most students have said the experience was life-changing. It is a significant physical and mental challenge — not your typical study-abroad tour. It builds skills that provide professional benefits, but the personal benefits are transforming,” Alwang said.

Both of the projects are funded by the U.S. Agency for International Development and managed by Virginia Tech’s Office of International Research, Education, and Development.

  • For more information on this topic, contact Miriam Rich at 540-231-4153.

Words from Ecuador

  • Experience the ups and downs of daily life as a student intern in Ecuador through this blog from Annah Latane, a senior from Montross, Va., majoring in agricultural and applied economics and international studies. 
  • Lauren Moore, a student in the 2011 group that traveled to Ecuador, created this website about her experiences. It includes everything from a description of a typical day with the program to general tips about traveling to Ecuador. Moore graduated in spring 2011 with a bachelor's degree in international studies.

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