The European Union has announced proposals to try to reverse an "alarming decline" in the number of bees - and other insects that pollinate the bloc's crops - including by rewarding organic farming.

The European Commission said a review of a 2018 EU Pollinators Initiative showed there were gaps, and "significant challenges" needed to be addressed with revised measures.

The proposal calls for promoting farming - organic or otherwise - that protects pollinating insects, cutting back on pesticides, better monitoring of pollinator populations, and better conservation of habitats including in urban areas.

At stake is much of the European Union's agricultural output.

The commission estimates that pollinators - mostly bees, but also hoverflies, moths, and some beetles and other insects - contribute around €5 billion a year to the bloc's food production.

Yet intensive farming practices, pesticides, pollution, changed land-use, other introduced species and climate change have all taken a serious toll on their populations.

"Pollinating insects have declined dramatically in diversity and abundance in the last decades, with many of them being threatened with extinction," the commission said in a statement.

Its proposal, made to the European Parliament and the 27 EU member states, looks to reverse pollinator decline by the end of this decade.

It focuses on wild populations of bees and other pollinators as the EU has other tools aimed at supporting honeybee farms.

It also is designed to work alongside the EU's farm subsidy scheme, called the Common Agricultural Policy, by rewarding farmers who implement sustainable methods.

The EU's environment commissioner, Virginijus Sinkevicius, said that "in the case of pollinators, these small insects will define the future of nature and long-term food security".

He said he hoped the EU's steps towards saving them "can inspire similar action in the entire world".