FILED - 09 August 2018, Germany, Niederdorla: Lying on their stomachs and driving backwards on the 'Gurkenflieger' tractor, Polish helpers harvest cucumbers on fields in the Unstrut-Hainich district. Photo: Frank May/dpa

FILED - 09 August 2018, Germany, Niederdorla: Lying on their stomachs and driving backwards on the 'Gurkenflieger' tractor, Polish helpers harvest cucumbers on fields in the Unstrut-Hainich district. Photo: Frank May/dpa

FILED - 09 August 2018, Germany, Niederdorla: Lying on their stomach and driving backwards on the 'Gurkenflieger' tractor, Polish helpers harvest cucumbers on fields in the Unstrut-Hainich district. Photo: Frank May/dpa

FILED - 09 August 2018, Germany, Niederdorla: Lying on their stomach and driving backwards on the 'Gurkenflieger' tractor, Polish helpers harvest cucumbers on fields in the Unstrut-Hainich district. Photo: Frank May/dpa

FILED - 09 August 2018, Germany, Niederdorla: Lying on their stomach and driving backwards on the 'Gurkenflieger' tractor, Polish helpers harvest cucumbers on fields in Unstrut-Hainich district. Photo: Frank May/dpa

FILED - 09 August 2018, Germany, Niederdorla: Lying on their stomach and driving backwards on the 'Gurkenflieger' tractor, Polish helpers harvest cucumbers on fields in Unstrut-Hainich district. Photo: Frank May/dpa

09 August 2018, Germany, Brandenburg: Cucumbers for pickling are harvested at the Biohof Schoeneiche with a "cucumber flyer". When picking the cucumbers, the harvesters lie on a mobile level. This year's cucumber harvest in the Spreewald comes to an unusually early end. (on "Cucumber harvest in the Spreewald ends unusually early" from 11.08.2018) Photo: Ralf Hirschberger/dpa-Zentralbild/ZB

09 August 2018, Germany, Brandenburg: Cucumbers are harvested at the organic farm Schoeneiche. This year's cucumber harvest in the Spreewald comes to an unusually early end. (on "Cucumber harvest in the Spreewald ends unusually early" from 11.08.2018) Photo: Ralf Hirschberger/dpa-Zentralbild/ZB

09 August 2018, Germany, Brandenburg: Cucumbers are harvested at the organic farm Schoeneiche. This year's cucumber harvest in the Spreewald comes to an unusually early end. (on "Cucumber harvest in the Spreewald ends unusually early" from 11.08.2018) Photo: Ralf Hirschberger/dpa-Zentralbild/ZB

09 August 2018, Germany, Brandenburg: Cucumbers for pickling are harvested at the organic farm Schoeneiche with a "cucumber flyer". This year's cucumber harvest in the Spreewald comes to an unusually early end. (on "Cucumber harvest in the Spreewald ends unusually early" from 11.08.2018) Photo: Ralf Hirschberger/dpa-Zentralbild/ZB

09 August 2018, Germany, Brandenburg: Cucumbers for pickle are harvested at the Biohof Schoeneiche with a "cucumber flyer". This year's cucumber harvest in the Spreewald comes to an unusually early end. (on "Cucumber harvest in the Spreewald ends unusually early" from 11.08.2018) Photo: Ralf Hirschberger/dpa-Zentralbild/ZB

09 August 2018, Germany, Brandenburg: Cucumbers for pickles are harvested at the Biohof Schoeneiche with a "cucumber flyer". This year's cucumber harvest in the Spreewald comes to an unusually early end. (on "Cucumber harvest in the Spreewald ends unusually early" from 11.08.2018) Photo: Ralf Hirschberger/dpa-Zentralbild/ZB

09 August 2018, Germany, Brandenburg: Cucumbers for pickles are harvested at the organic farm Schoeneiche with a "cucumber flyer". When picking the cucumbers, the harvesters lie on a mobile level. This year's cucumber harvest in the Spreewald comes to an unusually early end. (on "Cucumber harvest in the Spreewald ends unusually early" from 11.08.2018) Photo: Ralf Hirschberger/dpa-Zentralbild/ZB

09 August 2018, Germany, Brandenburg: Cucumbers for pickling are harvested at the Biohof Schoeneiche with a "cucumber flyer". When picking the cucumbers, the harvesters lie on a mobile level. This year's cucumber harvest in the Spreewald comes to an unusually early end. (on "Cucumber harvest in the Spreewald ends unusually early" from 11.08.2018) Photo: Ralf Hirschberger/dpa-Zentralbild/ZB