Farmers carry containers with lettuces at a farm during the nationwide quarantine as coronavirus disease (COVID-19) continues in La Grita, Venezuela April 18, 2020. Picture taken April 18, 2020. REUTERS/Carlos Eduardo Ramirez

A farmer carries a container with lettuces at a farm during the nationwide quarantine as coronavirus disease (COVID-19) continues in La Grita, Venezuela April 18, 2020. Picture taken April 18, 2020. REUTERS/Carlos Eduardo Ramirez

Farmers carry containers with lettuces at a farm during the nationwide quarantine as coronavirus disease (COVID-19) continues in La Grita, Venezuela April 18, 2020. Picture taken April 18, 2020. REUTERS/Carlos Eduardo Ramirez

A farmer harvests lettuces at a farm during the nationwide quarantine as coronavirus disease (COVID-19) continues in La Grita, Venezuela April 18, 2020. Picture taken April 18, 2020. REUTERS/Carlos Eduardo Ramirez

Farmers load a truck with rotten lettuces at a farm during the nationwide quarantine as coronavirus disease (COVID-19) continues in La Grita, Venezuela April 18, 2020. Picture taken April 18, 2020. REUTERS/Carlos Eduardo Ramirez

Farmers load a truck with rotten lettuces at a farm during the nationwide quarantine as coronavirus disease (COVID-19) continues in La Grita, Venezuela April 18, 2020. Picture taken April 18, 2020. REUTERS/Carlos Eduardo Ramirez

A child carries a container with rotten lettuces at a farm during the nationwide quarantine as coronavirus disease (COVID-19) continues in La Grita, Venezuela April 18, 2020. Picture taken April 18, 2020. REUTERS/Carlos Eduardo Ramirez

A farmer piles rotten lettuces at a farm during the nationwide quarantine as coronavirus disease (COVID-19) continues in La Grita, Venezuela April 18, 2020. Picture taken April 18, 2020. REUTERS/Carlos Eduardo Ramirez

Livestock eat rotten lettuce at a farm during the nationwide quarantine as coronavirus disease (COVID-19) continues in La Grita, Venezuela April 18, 2020. Picture taken April 18, 2020. REUTERS/Carlos Eduardo Ramirez

Roberto Banos and Tomas Alduaga pick lettuce at the Lurkoi organic farm, during the coronavirus disease (COVID-19) outbreak, Busturia, Spain, April 20, 2020. Picture taken April 20, 2020. REUTERS/Vincent West

A member of Rural Collserola picks up lettuce and mint plant in an ecological field during Earth Day, in the Collserola Mountains near Barcelona as the spread of the coronavirus disease (COVID-19) continues, the Collserola Mountains near Barcelona, Spain, April 22, 2020. REUTERS/Nacho Doce

A member of Rural Collserola picks up lettuce and mint plant in an ecological field during Earth Day, in the Collserola Mountains near Barcelona as the spread of the coronavirus disease (COVID-19) continues, the Collserola Mountains near Barcelona, Spain, April 22, 2020. REUTERS/Nacho Doce

Members of Rural Collserola pick up lettuce and mint plant in an ecological field during Earth Day, in the Collserola Mountains near Barcelona as the spread of the coronavirus disease (COVID-19) continues, the Collserola Mountains near Barcelona, Spain, April 22, 2020. REUTERS/Nacho Doce

A driver plows acres of ready-to-pick romaine lettuce into the ground due to the loss of the restaurant market during the outbreak of the coronavirus disease (COVID-19) in Holtville, California, U.S., April 15, 2020. REUTERS/Mike Blake

California farmer Jack Vessey stands in what remains of his field of romaine lettuce after having to plow it under due to the loss of the restaurant market during the outbreak of the coronavirus disease (COVID-19) in Holtville, California, U.S., April 15, 2020. REUTERS/Mike Blake

California farmer Jack Vessey stands in what remains of his field of romaine lettuce after having to plow it under due to the loss of the restaurant market during the outbreak of the coronavirus disease (COVID-19) in Holtville, California, U.S., April 15, 2020. REUTERS/Mike Blake

Acres of ready-to-pick romaine lettuce are plowed into the ground due to the loss of the restaurant market during the outbreak of the coronavirus disease (COVID-19) in Holtville, California, U.S., April 15, 2020. REUTERS/Mike Blake

Some of the acres of romaine lettuce is shown after having been plowed into the ground due to the loss of the restaurant market during the outbreak of the coronavirus disease (COVID-19) in Holtville, California, U.S., April 15, 2020. REUTERS/Mike Blake TPX IMAGES OF THE DAY

Some of the acres of romaine lettuce are shown after having been plowed into the ground due to the loss of the restaurant market during the outbreak of the coronavirus disease (COVID-19) in Holtville, California, U.S., April 15, 2020. REUTERS/Mike Blake

Some of the acres of romaine lettuce is shown after having been plowed into the ground due to the loss of the restaurant market during the outbreak of the coronavirus disease (COVID-19) in Holtville, California, U.S., April 15, 2020. REUTERS/Mike Blake

Acres of ready-to-pick romaine lettuce are plowed into the ground due to the loss of the restaurant market during the outbreak of the coronavirus disease (COVID-19) in Holtville, California, U.S., April 15, 2020. REUTERS/Mike Blake

Acres of romaine lettuce are shown after being plowed into the ground due to the loss of the restaurant market during the outbreak of the coronavirus disease (COVID-19) in Holtville, California, U.S., April 15, 2020. REUTERS/Mike Blake

Acres of romaine lettuce are shown after being plowed into the ground due to the loss of the restaurant market during the outbreak of the coronavirus disease (COVID-19) in Holtville, California, U.S., April 15, 2020. REUTERS/Mike Blake

Acres of romaine lettuce are shown after being plowed into the ground due to the loss of the restaurant market during the outbreak of the coronavirus disease (COVID-19) in Holtville, California, U.S., April 15, 2020. REUTERS/Mike Blake

Acres of ready-to-pick romaine lettuce are shown after being plowed into the ground due to the loss of the restaurant market during the outbreak of the coronavirus disease (COVID-19) in Holtville, California, U.S., April 15, 2020. REUTERS/Mike Blake

Acres of ready-to-pick romaine lettuce are shown before being plowed into the ground due to the loss of the restaurant market during the outbreak of the coronavirus disease (COVID-19) in Holtville, California, U.S., April 15, 2020. REUTERS/Mike Blake

Acres of ready-to-pick romaine lettuce are plowed into the ground due to the loss of the restaurant market during the outbreak of the coronavirus disease (COVID-19) in Holtville, California, U.S., April 15, 2020. REUTERS/Mike Blake

Acres of ready-to-pick romaine lettuce are shown before being plowed into the ground due to the loss of the restaurant market during the outbreak of the coronavirus disease (COVID-19) in Holtville, California, U.S., April 15, 2020. REUTERS/Mike Blake

Acres of ready-to-pick romaine lettuce are plowed into the ground due to the loss of the restaurant market during the outbreak of the coronavirus disease (COVID-19) in Holtville, California, U.S., April 15, 2020. REUTERS/Mike Blake

Acres of ready-to-pick romaine lettuce are plowed into the ground due to the loss of the restaurant market during the outbreak of the coronavirus disease (COVID-19) in Holtville, California, U.S., April 15, 2020. REUTERS/Mike Blake

Acres of ready-to-pick romaine lettuce are plowed into the ground due to the loss of the restaurant market during the outbreak of the coronavirus disease (COVID-19) in Holtville, California, U.S., April 15, 2020. REUTERS/Mike Blake

Acres of ready-to-pick romaine lettuce are plowed into the ground due to the loss of the restaurant market during the outbreak of the coronavirus disease (COVID-19) in Holtville, California, U.S., April 15, 2020. REUTERS/Mike Blake

A farmer feeds iceberg lettuce to his buffalo during a 21-day nationwide lockdown to slow the spreading of coronavirus disease (COVID-19), at Bhuinj village in Satara district in the western state of Maharashtra, India, April 1, 2020. Picture taken April 1, 2020. REUTERS/Rajendra Jadhav

A field of lettuce is seen in the greenhouse of vegetable grower Didier Lenoble during the outbreak of Coronavirus disease (COVID-19) in Perigny-sur-Yerres, France, March 31, 2020. Picture taken March 31, 2020. REUTERS/Charles Platiau

Carrie Chlebanowski sanitizes a delivery box for lettuce on her farm in Alex, Oklahoma, U.S., March 20, 2020. Picture taken March 20, 2020. REUTERS/Nick Oxford

Carrie Chlebanowski washes spring mix lettuce on her farm in Alex, Oklahoma, U.S., March 20, 2020. Picture taken March 20, 2020. REUTERS/Nick Oxford

Vegetable growers hold lettuces before giving away their products as they take part in a protest against a four-day crop sales strike outside the Casa Rosada Presidential Palace organized by Argentina's main farm groups, in Buenos Aires, Argentina March 10, 2020. REUTERS/Agustin Marcarian

A man hangs up lettuce at the door of a restaurant for Chinese dragons, during celebrations of the Chinese Lunar New Year, in Lima, Peru January 25, 2020. Picture taken January 25, 2020. REUTERS/Alessandro Cinque

Aymara journalist and media producer Sonia Quispe, 27, washes lettuce on a visit to her hometown in Vilaque, a farmers community located on the outskirts of El Alto, Bolivia August 31, 2019. "In these 13 years of Evo Morales government I believe the most humble people have benefited, the farmers that live off the land," she said, adding that while Evo wasn't perfect, only he could keep driving the process of change in the country. "There are many problems and issues to be fixed but I believe in him," she said. REUTERS/Manuel Seoane SEARCH "AYMARA ELECTIONS" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.

A green sea turtle is surrounded by lettuce as it swims in a pool at the Israeli Sea Turtle Rescue Center, in Mikhmoret north of Tel Aviv, Israel September 23, 2019. Picture taken September 23, 2019. REUTERS/Amir Cohen

Hydroponic lettuce is pictured on the small farm of Erick Solis in San Jose, Costa Rica May 2, 2019. REUTERS/Juan Carlos Ulate

Erick Solis (not pictured) irrigates hydroponic lettuce at his house on a small farm in San Jose, Costa Rica May 2, 2019. REUTERS/Juan Carlos Ulate

Hydroponic lettuces are seen on a small farm of Erick Solis in San Jose, Costa Rica May 2, 2019. REUTERS/Juan Carlos Ulate

Erick Solis irrigates hydroponic lettuce at his house on a small farm in San Jose, Costa Rica May 2, 2019. REUTERS/Juan Carlos Ulate

Erick Solis grows hydroponic lettuce at his house on a small farm in San Jose, Costa Rica May 2, 2019. REUTERS/Juan Carlos Ulate

A red lettuce is pictured inside a four-level 30 square metres large farming technology container with 900 plants lit by LED lights outside a store of IKEA, the world's biggest furniture group, in Kaarst near Duesseldorf, Germany, April 3, 2019. IKEA tests growing the crops fully automated without soil using organic nutrients produced by recycling organic waste from the nearby IKEA restaurant taking five weeks from sowing to harvest. REUTERS/Wolfgang Rattay

A basil plant and a red lettuce grown without soil, using nutrients and water while LED-lights give it the light it needs to grow, is pictured outside a 30 square meters farming technology container that IKEA, the world's biggest furniture group, tests at an IKEA store in Kaarst near Duesseldorf, Germany, April 3, 2019. The crops grow on four fully automated levels using organic nutrients produced by recycling organic waste taking five weeks from sowing to harvest. REUTERS/Wolfgang Rattay

A red lettuce grown without soil, using nutrients and water while LED-lights give it the light it needs to grow, is pictured outside a 30 square meters farming technology container that IKEA, the world's biggest furniture group tests at an IKEA store in Kaarst near Duesseldorf, Germany, April 3, 2019. The crops grow on four fully automated levels using organic nutrients produced by recycling organic waste taking five weeks from sowing to harvest. REUTERS/Wolfgang Rattay

People grab lettuce during a farmers' protest against low prices outside the Casa Rosada Presidential Palace in Buenos Aires, Argentina February 27, 2019. REUTERS/Agustin Marcarian

A man receives a lettuce during a farmers' protest against low prices outside the Casa Rosada Presidential Palace in Buenos Aires, Argentina February 27, 2019. REUTERS/Agustin Marcarian

A farmer hands lettuce to a child during a protest against low salaries outside the Casa Rosada Presidential Palace in Buenos Aires, Argentina February 27, 2019. REUTERS/Agustin Marcarian

A man holds lettuce during a farmers' protest against low prices outside the Casa Rosada Presidential Palace in Buenos Aires, Argentina February 27, 2019. REUTERS/Agustin Marcarian

A man holds a tomato and a lettuce during a farmers' protest against low prices outside the Casa Rosada Presidential Palace in Buenos Aires, Argentina February 27, 2019. REUTERS/Agustin Marcarian

A man receives a lettuce from a farmer during a protest against low prices outside the Casa Rosada Presidential Palace in Buenos Aires, Argentina February 27, 2019. REUTERS/Agustin Marcarian

People grab lettuce during a farmers' protest against low prices outside the Casa Rosada Presidential Palace in Buenos Aires, Argentina. February 27, 2019. REUTERS/Agustin Marcarian

A farmer hands lettuce to a child during a protest against low salaries outside the Casa Rosada Presidential Palace in Buenos Aires, Argentina February 27, 2019. REUTERS/Agustin Marcarian

Romaine lettuce is displayed on a grocery store shelf in Toronto, Ontario, Canada, November 21, 2018. REUTERS/Chris Helgren

Romaine lettuce is displayed on a grocery store shelf in Toronto, Ontario, Canada, November 21, 2018. REUTERS/Chris Helgren

Romaine lettuce has been taken off the shelf for fear of an E. coli outbreak at this grocery store in Toronto, Ontario, Canada November 21, 2018. REUTERS/Carlos Osorio

Romaine lettuce has been taken off the shelf for fear of an E. coli outbreak at this grocery store in Toronto, Ontario, Canada November 21, 2018. REUTERS/Carlos Osorio