Study

Impact of tillage on the crop pollinating, ground-nesting bee, Peponapis pruinosa in California

  • Published source details Ullmann K.S., Meisner M.H. & Williams N.M. (2016) Impact of tillage on the crop pollinating, ground-nesting bee, Peponapis pruinosa in California. Agriculture, Ecosystems & Environment, 232, 240-246.

Actions

This study is summarised as evidence for the following.

Action Category

Pollination: Use no tillage in arable fields

Action Link
Mediterranean Farmland
  1. Pollination: Use no tillage in arable fields

    A replicated, randomized, controlled study in 2012–2013 in an irrigated squash field in the Central Valley, California, USA, found more soil-nesting bees in plots with no tillage, compared to deep tillage. Pollinator numbers: More Peponapis pruinosa squash bees emerged from nests in plots with no tillage, compared to deep tillage (11 vs 8 bees/cage). Methods: In August 2012, bee nests were established in 20 plots (3 x 3 x 1.8 m field cages), each of which contained drip-irrigated squash plants. Deep tillage (disking, ripping, and subsoiling: 41 cm maximum depth) was used on 10 of these plots, in autumn 2012. Emerging bees were collected in blue vane traps (26 May–26 September 2013).

     

Output references
What Works 2021 cover

What Works in Conservation

What Works in Conservation provides expert assessments of the effectiveness of actions, based on summarised evidence, in synopses. Subjects covered so far include amphibians, birds, mammals, forests, peatland and control of freshwater invasive species. More are in progress.

More about What Works in Conservation

Download free PDF or purchase
The Conservation Evidence Journal

The Conservation Evidence Journal

An online, free to publish in, open-access journal publishing results from research and projects that test the effectiveness of conservation actions.

Read the latest volume: Volume 18

Go to the CE Journal

Discover more on our blog

Our blog contains the latest news and updates from the Conservation Evidence team, the Conservation Evidence Journal, and our global partners in evidence-based conservation.


Who uses Conservation Evidence?

Meet some of the evidence champions

Endangered Landscape Programme Red List Champion - Arc Kent Wildlife Trust The Rufford Foundation Save the Frogs - Ghana Bern wood Supporting Conservation Leaders National Biodiversity Network Sustainability Dashboard Frog Life The international journey of Conservation - Oryx British trust for ornithology Cool Farm Alliance UNEP AWFA Butterfly Conservation People trust for endangered species Vincet Wildlife Trust