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A Wind Tunnel for Odor Mediated Insect Behavioural Assays

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High tunnels: protection for rather than from insect pests?

Laura L Ingwell¹, Sarah L Thompson¹, Ian Kaplan¹

¹Department of Entomology, Purdue University, West Lafayette, IN, USA.

Pest Management Science

|June 6, 2017

Summary

High tunnels do not protect crops from pests; instead, they may increase pest populations. Research shows greenhouse pests and common field pests like hornworms were more abundant in high tunnels than in open fields.

Keywords:

pest management protected agriculture season extension vegetables

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Area of Science:

Agricultural Science
Entomology
Horticulture

Background:

High tunnels are increasingly used in the USA for season extension, merging field and greenhouse conditions.
Limited research exists on high tunnel management and pest control effectiveness.
A key purported benefit of high tunnels is protection from common field pests, though evidence is lacking.

Purpose of the Study:

To compare insect pest populations in high tunnels versus traditional field production.
To evaluate the efficacy of high tunnels in mitigating pest pressure for key crops.

Main Methods:

A two-year comparative study of insect pest populations.
Three crops (tomato, broccoli, cucumber) were grown in both high tunnel and field environments.
Pest populations were monitored and quantified in each setting.

Main Results:

Greenhouse pests (aphids, whiteflies) were more prevalent in high tunnels.
Hornworms and crucifer caterpillar complex populations were higher in high tunnels.
Cucumber beetle densities varied, being higher in high tunnels in one year and field plots in another.

Conclusions:

The assumption that high tunnels provide pest protection is not supported by this research.
High tunnel environments may inadvertently promote increased pest populations.
Further research into high tunnel pest management strategies is warranted.