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Pest suppression in cultivar mixtures is influenced by neighbor-specific plant-plant communication

Dahlin, Iris and Rubene, Diana and Glinwood, Robert and Ninkovic, Velemir (2018). Pest suppression in cultivar mixtures is influenced by neighbor-specific plant-plant communication. Ecological applications. 28 , 2187-2196
[Journal article]

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Abstract

Increased plant genotypic diversity in crop fields can promote ecosystem services including pest control, but understanding of mechanisms behind herbivore population responses to cultivar mixtures is limited. We studied aphid settling on barley plants exposed to volatiles from different cultivars, aphid population development in monocultures and two-cultivar mixtures, and differences in volatile composition between studied cultivars. Aphid responses to one cultivar in a mixture were neighbor-specific and this was more important for pest suppression than the overall mixture effect, aphid colonization patterns, or natural enemy abundance. Aphid populations decreased most in a mixture where both cultivars showed a reduced aphid-plant acceptance after reciprocal volatile exposure in the laboratory, and reduced population growth compared to monocultures in the field. Our findings suggest that herbivore population responses to crop genotypic diversity can depend on plant-plant volatile interactions, which can lead to changes in herbivore response to individual cultivars in a mixture, resulting in slower population growth. The impact of plant-plant interaction through volatiles on associated herbivore species is rarely considered, but improved understanding of these mechanisms would advance our understanding of the ecological consequences of biodiversity and guide development of sustainable agricultural practices. Combining cultivars in mixtures based on how they interact with each other is a promising strategy for sustainable pest management.

Authors/Creators:Dahlin, Iris and Rubene, Diana and Glinwood, Robert and Ninkovic, Velemir
Title:Pest suppression in cultivar mixtures is influenced by neighbor-specific plant-plant communication
Series/Journal:Ecological applications (1051-0761)
Year of publishing :2018
Volume:28
Page range:2187-2196
Number of Pages:10
Publisher:Wiley Periodicals, Inc, Ecological Society of America
ISSN:1051-0761
Language:English
Publication Type:Journal article
Refereed:Yes
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution-Noncommercial-No Derivative Works 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
Keywords:aphid, botanical diversity, cultivar mixtures, functionality, genotype, herbivore suppression, intraspecific plant diversity, pest management, plant signal substances, plant-herbivore interactions, plant-plant communication, volatile organic compound
URN:NBN:urn:nbn:se:slu:epsilon-e-5180
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-5180
Additional ID:
Type of IDID
DOI10.1002/eap.1807
Web of Science (WoS)000451913200021
ID Code:15843
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Crop Production Ecology
(NL, NJ) > Dept. of Ecology
(S) > Dept. of Ecology
Deposited By: SLUpub Connector
Deposited On:18 Jan 2019 11:56
Metadata Last Modified:18 Jan 2019 11:56

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