Trap Cropping Harlequin Bug: Distance of Separation Influences Female Movement and Oviposition

To evaluate perimeter trap crops for management of harlequin bug, Murgantia histrionica (Hahn), we undertook greenhouse and field experiments with mustard greens as trap crop for a collard cash crop. We confirmed that harlequin bugs prefer to immigrate to and reside on mustard. Females, however, in...

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Published in:Journal of economic entomology 2021-04, Vol.114 (2), p.848-856
Main Authors: Bier, Alexander D., Wallingford, Anna K., Haber, Ariela I., Herlihy-Adams, Megan V., Weber, Donald C.
Format: Article
Language:English
Subjects:
Brassicaceae
Cash crops
cole crops
Commuting
Crops
crucifer
cultural control
Egg laying
Eggs
Evaluation
Females
Field tests
Greenhouses
HORTICULTURAL ENTOMOLOGY
Oviposition
Semiochemicals
Trap crops
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cited_by cdi_FETCH-LOGICAL-b458t-333f4cf89779909dbdbc74a612ce12a25bcc311931874c34ec87bcfe224f35e73
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container_title Journal of economic entomology
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creator Bier, Alexander D.
Wallingford, Anna K.
Haber, Ariela I.
Herlihy-Adams, Megan V.
Weber, Donald C.
description To evaluate perimeter trap crops for management of harlequin bug, Murgantia histrionica (Hahn), we undertook greenhouse and field experiments with mustard greens as trap crop for a collard cash crop. We confirmed that harlequin bugs prefer to immigrate to and reside on mustard. Females, however, in greenhouse cage experiments, ‘commuted’ to collards to lay their eggs. In separate spring and fall field plantings, using replicated 12 m by 12 m collard plots in 1-ha fields, we tested mustard planted as an adjacent perimeter trap crop, or a perimeter trap crop separated by 2 unplanted rows (2.3 m), or with no trap crop. Adults accumulated on the spring mustard crop but overall numbers remained low, with all collards sustaining
doi_str_mv 10.1093/jee/toab022
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We confirmed that harlequin bugs prefer to immigrate to and reside on mustard. Females, however, in greenhouse cage experiments, ‘commuted’ to collards to lay their eggs. In separate spring and fall field plantings, using replicated 12 m by 12 m collard plots in 1-ha fields, we tested mustard planted as an adjacent perimeter trap crop, or a perimeter trap crop separated by 2 unplanted rows (2.3 m), or with no trap crop. Adults accumulated on the spring mustard crop but overall numbers remained low, with all collards sustaining &lt;1% leaves damaged. In the fall, the separation of 2.3 m reduced oviposition on collards fourfold, and feeding damage approximately 2.5-fold, compared to collards with an adjacent trap crop. Fall control plots with no border trap crop showed even lower foliar damage; likely result of preferential immigration of harlequin bugs to mustard at the field scale, resulting in fewer bugs near the control treatment plots. Thus, the spatial arrangement of the mustard trap crop, and its separation from the cash crop, influences pest abundance and damage. A separated mustard border can reduce bug movement including female commuting and egg-laying, thus better protecting the collard cash crop. 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source Oxford Journals Online
subjects Brassicaceae
Cash crops
cole crops
Commuting
Crops
crucifer
cultural control
Egg laying
Eggs
Evaluation
Females
Field tests
Greenhouses
HORTICULTURAL ENTOMOLOGY
Oviposition
Semiochemicals
Trap crops
title Trap Cropping Harlequin Bug: Distance of Separation Influences Female Movement and Oviposition
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