CTAHR NEWS

Screenhouse Success Story

A new series showcases Hawaiʻi Extension to a national audience

Screenhouse Success Story

The first Story Lead Contest for eXtension Farm Journal has a winner, and it’s CTAHR!

Interim Associate Dean of Extension Jeff Goodwin submitted the winning story last month, about the outstanding success of a Cooperative Extension project on screenhouse technology that leads to much higher yields and reduced insecticide use.

The national Cooperative Extension journal selects one story per month to highlight. The story was also featured on their daily TV show, AgDay—the clip, including some drone footage, is embedded at the bottom of the story—and featured on the Overhe(a)rd podcast.

The project is well worth celebrating. Since 2014, CES has been designing and evaluating different prototypes of screenhouses to find those best adapted for managing insect pests, especially pests that develop resistance to common crop-protection insecticides. Screenhouses serve as a non-chemical, physical barrier that puts the pest at a disadvantage. Some 24 structures were placed on a wide range of farming systems in Hawai‘i for this research.

With the screenhouses, growers can reduce their insecticide use by 50% for the management of small pests, such as fruit flies, caterpillars, aphids, whiteflies, and thrips. Marketable yields shot up five-fold (sometimes up to seven-fold!) for non-pollinated cucumber, kale, and zucchini.

Adding insectary plants that attract beneficial insects inside the screenhouse through the team’s “Ecosystem Enhanced Screenhouse” method boosts crop yields even higher.

Extension also collaborated with the USDA and NRCS to showcase the advantages of integrating screen with high-tunnel systems for environmental conservation. As a result, NRCS has contracted for the installation of 187 commercial high tunnels in Hawai‘i through federal cost-share programs, magnifying the footprint of food production across the state.

“This success story about the evolution of the screenhouse in Hawai‘i agriculture is an example of how Hawai‘i Cooperative Extension is demonstrating our relevance to Hawai‘i stakeholders, legislators, and residents,” says Jeff. “Extension agents and specialists are submitting a variety of these Impact Statements to help communicate the relevance of UH Mānoa, CTAHR, and Hawai‘i Cooperative Extension Educational programs.”   

Read the full Impact Statement here.  

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