Jouan Rius / Large courgette / marrow (Cucurbita pepo) growing in vegetable garden, France, August 2013.

Jouan Rius / Large courgette / marrow (Cucurbita pepo) growing in vegetable garden, France, August 2013.

Cyril Ruoso / Pumpkin (Cucurbita pepo) growing in organic garden tended to by inmates as part of Sustainability in Prison program, Cedar Creek Corrections Center, Washington, USA. September 2012.

Cyril Ruoso / Vegetables originating from South America that have successfully acclimatized in Europe: aubergine, beans, courgette / zuchini, maize, red pepper, potato, squash and tomato

Gary K. Smith / Wooden trug with freshly harvested home grown green and yellow courgette (Cucurbita pepo) varieties, Norfolk, England UK. July

Gary K. Smith / Courgettes, lettuce and cucumber growing in small raised bed with antique cloche, England, July.

Gary K. Smith / Courgettes, lettuce and cucumber growing in small raised bed with antique cloche, England, July.

Gary K. Smith / Courgettes, lettuce and cucumber growing in small raised bed with antique cloche, England, July.

Gary K. Smith / Courgettes, lettuce and cucumber growing in small raised bed with antique cloche, England, July.

David Noton / Vegetables, red peppers and courgettes at market at Aix en Provence, France, October.

Pal Hermansen / Variet of Pumpkins and squashes (Cucurbita pepo) Norway, August.

Pal Hermansen / Halloween decorations including pumpkins (Cucurbita pepo) outside house, outskirts of Minneapolis, USA.

Pal Hermansen / Seed of Pumpkin (Cucurbita pepo) on white background

Paul Harcourt Davies / Courgette flower (Cucurbita pepo) Podere Montecucco, Orvieto, Umbria, Italy, August.

Jean E. Roche / Courgette flower, Cidamos garden, Alpilles, France, October 2012.

Jean E. Roche / Polytunnel with courgettes growing, Cidamos gardens, Alpilles, France, October 2012.

Paul Harcourt Davies / Flowers of Courgette / Zucchini (Cucurbita pepo) - male with stamens visible, in a garden near Orvieot, Umbria, Italy

Simon Colmer / Slug and snail damage on courgette leaves, UK

Gary K. Smith / Various varieties of homegrown courgette, Norfolk, UK, July.

Gary K. Smith / Various varieties of homegrown courgette, Norfolk, UK, July.

Gary K. Smith / Various varieties of homegrown courgette, Norfolk, UK, July.

Gary K. Smith / Freshly harvested home grown organic vegetables with 'organic' label, carrots, peppers, courgettes, cucumbers, UK

Gary K. Smith / Freshly harvested home grown organic vegetables, carrots, peppers, courgettes, cucumbers, aubergine, tomatoes, UK

Gary K. Smith / Freshly harvested home grown organic vegetables with 'organic' label, carrots, peppers, courgettes, cucumbers, UK

Gary K. Smith / Freshly harvested home grown organic salad vegetables, washed in colander and ready for the kitchen, lettuce, peppers, tomatoes, carrot, UK

Gary K. Smith / Freshly harvested home grown organic salad vegetables, washed in colander and ready for the kitchen, lettuce, peppers, aubergines, tomatoes, carrot, UK

Gary K. Smith / Freshly harvested home grown organic vegetables with 'organic' label, carrots, peppers, courgettes, cucumbers, aubergine, tomatoes, UK

Gary K. Smith / Freshly harvested home grown organic vegetables with 'organic' label, carrots, peppers, courgettes, cucumbers, aubergine, UK

Kim Taylor / Squash Bug (Coreus marginatus) on courgette flower. England.

Nigel Cattlin / Pumpkin (Cucurbita pepo) seeds taken from a fresh ripe pumpkin fruit.