White asparagus is packaged as harvest begins in Mannsdorf an der Donau, as the spread of the coronavirus disease (COVID-19) continues, Mannsdorf an der Donau, Austria, April 23, 2020. REUTERS/Lisi Niesner 

Asparagus is put on a conveyor belt as harvest begins in Mannsdorf an der Donau, as the spread of the coronavirus disease (COVID-19) continues, Mannsdorf an der Donau, Austria, April 23, 2020. REUTERS/Lisi Niesner 

Workers harvest asparagus in Mannsdorf an der Donau, as the spread of the coronavirus disease (COVID-19) continues, Mannsdorf an der Donau, Austria, April 23, 2020. REUTERS/Lisi Niesner 

A worker uncovers asparagus from soil during harvest in Mannsdorf an der Donau, as the spread of the coronavirus disease (COVID-19) continues, Mannsdorf an der Donau, Austria, April 23, 2020. REUTERS/Lisi Niesner 

Workers harvest asparagus in Mannsdorf an der Donau, as the spread of the coronavirus disease (COVID-19) continues, Mannsdorf an der Donau, Austria, April 23, 2020. REUTERS/Lisi Niesner 

A view of asparagus as farmers struggle to find workers due to the coronavirus lockdown, in Rosoux, Belgium, April 17, 2020. Picture taken April 17, 2020. REUTERS/Johanna Geron 

A box of asparagus is seen during the coronavirus disease (COVID-19) outbreak in Torre del Burgo, Spain, April 20, 2020. Picture taken April 20, 2020. REUTERS/Juan Medina 

A field of asparagus is seen during the coronavirus disease (COVID-19) outbreak in Torre del Burgo, Spain, April 20, 2020. Picture taken April 20, 2020. REUTERS/Juan Medina 

Agricultural workers operate tractors with seeders to sow soybeans in the field near the village of Husachivka in Kiev region, Ukraine April 17, 2020. REUTERS/Anton Muraviov 

Agricultural workers operate tractors with seeders to sow soybeans in the field near the village of Husachivka in Kiev region, Ukraine April 17, 2020. REUTERS/Anton Muraviov 

An agricultural worker drives a tractor spreading fertilizers to a field of winter wheat near the village of Husachivka in Kiev region, Ukraine April 17, 2020. REUTERS/Valentyn Ogirenko 

Soy plants are seen at sunset on a farmland in Chivilcoy, on the outskirts of Buenos Aires, Argentina April 8, 2020. Picture taken April 8, 2020. REUTERS/Agustin Marcarian 

Soy plants are seen at sunset on a farmland in Chivilcoy, on the outskirts of Buenos Aires, Argentina April 8, 2020. Picture taken April 8, 2020. REUTERS/Agustin Marcarian 

Soy plants are seen at sunset on a farmland in Chivilcoy, on the outskirts of Buenos Aires, Argentina April 8, 2020. Picture taken April 8, 2020. REUTERS/Agustin Marcarian 

Soy plants are seen on a farmland in Chivilcoy, on the outskirts of Buenos Aires, Argentina April 8, 2020. Picture taken April 8, 2020. REUTERS/Agustin Marcarian 

Soy plants are seen at sunset on a farmland in Chivilcoy, on the outskirts of Buenos Aires, Argentina April 8, 2020. Picture taken April 8, 2020. REUTERS/Agustin Marcarian 

Soy plants are seen at sunset on a farmland in Chivilcoy, on the outskirts of Buenos Aires, Argentina April 8, 2020. Picture taken April 8, 2020. REUTERS/Agustin Marcarian 

Corn plants are seen on a farmland in Chivilcoy, on the outskirts of Buenos Aires, Argentina April 8, 2020. Picture taken April 8, 2020. REUTERS/Agustin Marcarian 

Soy plants are seen on a farmland in Chivilcoy, on the outskirts of Buenos Aires, Argentina April 8, 2020. Picture taken April 8, 2020. REUTERS/Agustin Marcarian 

Soy plants are seen on a farmland in Chivilcoy, on the outskirts of Buenos Aires, Argentina April 8, 2020. Picture taken April 8, 2020. REUTERS/Agustin Marcarian 

A combine harvester is used to harvest soybeans on a farmland in Chivilcoy, on the outskirts of Buenos Aires, Argentina April 8, 2020. Picture taken April 8, 2020. REUTERS/Agustin Marcarian 

Soy plants are seen on a farmland in Chivilcoy, on the outskirts of Buenos Aires, Argentina April 8, 2020. Picture taken April 8, 2020. REUTERS/Agustin Marcarian 

Corn plants are seen on a farmland in Chivilcoy, on the outskirts of Buenos Aires, Argentina April 8, 2020. Picture taken April 8, 2020. REUTERS/Agustin Marcarian 

Corn plants are seen on a farmland in Chivilcoy, on the outskirts of Buenos Aires, Argentina April 8, 2020. Picture taken April 8, 2020. REUTERS/Agustin Marcarian 

Corn plants are seen on a farmland in Chivilcoy, on the outskirts of Buenos Aires, Argentina April 8, 2020. Picture taken April 8, 2020. REUTERS/Agustin Marcarian 

A farmer checks his sugar beets in Tilloy-lez-Cambrai, France April 10, 2020. Picture taken with a drone. REUTERS/Pascal Rossignol 

Farmers work in a plantation, amid coronavirus disease (COVID-19) outbreak, in Piedade, Sao Paulo State, Brazil, April 8, 2020. Picture taken April 8, 2020. REUTERS/Rahel Patrasso 

A large stock of Potatoes is turned into cattle feed, after sales to restaurants and catering services slumped due to closures resulting from the coronavirus disease (COVID-19) outbreak, at his property in Purmer, Netherlands, April 8, 2020. REUTERS/Eva Plevier 

Ripe and rotten oranges due to the lack of workers for harvesting are seen at a farm in Lake Wales, Florida, U.S., April 1, 2020. Picture taken April 1, 2020. REUTERS/Marco Bello 

A truck filled with oranges is seen during a harvest at a farm in Lake Wales, Florida, U.S., April 1, 2020. Picture taken April 1, 2020. REUTERS/Marco Bello 

A Mexican migrant worker talks over his phone during a harvest at an oranges farm in Lake Wales, Florida, U.S., April 1, 2020. Picture taken April 1, 2020. REUTERS/Marco Bello 

A Mexican migrant worker takes a break during a harvest at an oranges farm in Lake Wales, Florida, U.S., April 1, 2020. Picture taken April 1, 2020. REUTERS/Marco Bello 

A view of a container filled with oranges and a ladder during a harvest at a farm in Lake Wales, Florida, U.S., April 1, 2020. Picture taken April 1, 2020. REUTERS/Marco Bello 

A general view of a field or oranges during a harvest at a farm in Lake Wales, Florida, U.S., April 1, 2020. Picture taken April 1, 2020. REUTERS/Marco Bello 

A Mexican migrant worker carries containers filled with blueberries during a harvest at a farm in Lake Wales, Florida, U.S., March 31, 2020. Picture taken March 31, 2020. REUTERS/Marco Bello 

A Mexican migrant worker carries a container filled with blueberries during a harvest at a farm in Lake Wales, Florida, U.S., March 31, 2020. Picture taken March 31, 2020. REUTERS/Marco Bello 

A Mexican migrant worker picks blueberries during a harvest at a farm in Lake Wales, Florida, U.S., March 31, 2020. Picture taken March 31, 2020. REUTERS/Marco Bello 

An agricultural worker cleans carrot crops of weeds amid an outbreak of the coronavirus disease (COVID-19) at a farm near Arvin, California, U.S., April 3, 2020. REUTERS/Shannon Stapleton TPX IMAGES OF THE DAY 

A Mexican migrant worker carries containers filled with blueberries during a harvest at a farm in Lake Wales, Florida, U.S., March 31, 2020. Picture taken March 31, 2020. REUTERS/Marco Bello 

Ripe and rotten oranges due to the lack of workers for harvesting are seen at a farm in Lake Wales, Florida, U.S., April 1, 2020. Picture taken April 1, 2020. REUTERS/Marco Bello 

Seagulls fly around as a farmer ploughs a field in Liepupe, Latvia April 3, 2020. REUTERS/Ints Kalnins 

Potatoes from a large stock are pictured as at farmer's property as he can?t sell them to restaurants or catering services that are closed due the coronavirus disease (COVID-19) outbreak, in Purmer, Netherlands, April 3, 2020. REUTERS/Eva Plevier 

Potatoes from a large stock are pictured as at farmer's property as he can?t sell them to restaurants or catering services that are closed due the coronavirus disease (COVID-19) outbreak, in Purmer, Netherlands, April 3, 2020. REUTERS/Eva Plevier 

Potatoes from a large stock are pictured as at farmer's property as he can’t sell them to restaurants or catering services that are closed due the coronavirus disease (COVID-19) outbreak, in Purmer, Netherlands, April 3, 2020. REUTERS/Eva Plevier 

The hands of a farmer are pictured among a large stock of potatoes that he can?t sell to restaurants or catering services, as they are closed due the coronavirus disease (COVID-19) outbreak, at his property in Purmer, Netherlands, April 3, 2020. REUTERS/Eva Plevier 

General view of unpicked daffodils, as the spread of the coronavirus disease (COVID-19) continues, Craigo, Scotland, Britain, April 2, 2020. REUTERS/Russell Cheyne 

General view of unpicked daffodils, as the spread of the coronavirus disease (COVID-19) continues, Craigo, Scotland, Britain, April 2, 2020. REUTERS/Russell Cheyne 

General view of unpicked daffodils, as the spread of the coronavirus disease (COVID-19) continues, Craigo, Scotland, Britain, April 2, 2020. REUTERS/Russell Cheyne 

General view of unpicked daffodils, as the spread of the coronavirus disease (COVID-19) continues, Craigo, Scotland, Britain, April 2, 2020. REUTERS/Russell Cheyne 

A lone agricultural worker is shown in a field during the outbreak of the coronavirus disease (COVID-19) in the San Pasqual Valley of California, U.S., March 30, 2020. REUTERS/Mike Blake 

An orchard of oranges are shown growing during the outbreak of the coronavirus disease (COVID-19) in the San Pasqual Valley of California, U.S., March 30, 2020. REUTERS/Mike Blake 

An orchard of oranges are shown growing under a hillside of avocado trees during the outbreak of the coronavirus disease (COVID-19) in the San Pasqual Valley of California, U.S., March 30, 2020. REUTERS/Mike Blake 

An orchard of oranges are shown growing during the outbreak of the coronavirus disease (COVID-19) in the San Pasqual Valley of California, U.S., March 30, 2020. REUTERS/Mike Blake 

An abandoned homestead in a corn field near Keyes, Oklahoma in the state's panhandle region which has yet to report a single case of coronavirus, in Guymon, U.S., March 26, 2020. Picture taken March 26, 2020. REUTERS/Andrew Hay 

Tulip fields are seen in Lisse, Netherlands, March 27, 2020. REUTERS/Piroschka van de Wouw 

Tulip fields are seen in Lisse, Netherlands, March 27, 2020. REUTERS/Piroschka van de Wouw 

Tulip fields are seen in Lisse, Netherlands, March 27, 2020. REUTERS/Piroschka van de Wouw 

An aerial picture shows an asparagus field near Dormagen, Germany, March 26, 2020. REUTERS/Stephane Nitschke 

An aerial picture shows an asparagus field near Dormagen, Germany, March 26, 2020. REUTERS/Stephane Nitschke 

An aerial picture shows an asparagus field near Dormagen, Germany, March 26, 2020. REUTERS/Stephane Nitschke