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Media type:
E-Article
Title:
Better outcomes for pest pressure, insecticide use, and yield in less intensive agricultural landscapes
Contributor:
Gagic, Vesna;
Holding, Matthew;
Venables, William N.;
Hulthen, Andrew D.;
Schellhorn, Nancy A.
Published:
Proceedings of the National Academy of Sciences, 2021
Published in:
Proceedings of the National Academy of Sciences, 118 (2021) 12
Language:
English
DOI:
10.1073/pnas.2018100118
ISSN:
1091-6490;
0027-8424
Origination:
Footnote:
Description:
SignificanceIncreasing crop field sizes and decreasing seminatural area is believed to lead to increased pest pressure and insecticide use due to earlier and frequent pest immigration and fewer natural enemies. However, after decades of research on how landscape simplification affects pest pressure in crops, there is conflicting evidence. We show that smaller fields surrounded by landscapes with 20 to 30% seminatural area had delayed and reduced pest immigration and spraying while producing the highest yields. These findings reveal a previously untested link sequence starting from agricultural intensification through pest immigration and dynamics, to insecticide use and yield. Moreover, fine temporal analyses provide unique understanding of how these effects change over time and potential explanation for the inconsistencies in the literature.