CTAHR NEWS

Better Harvests, Better Markets

Pruning and pesticide trials help coffee growers

Better Harvests, Better Markets

CTAHR faculty and staff, with the support of HDOA, USDA, and grower-cooperator Greenwell Farms, have conducted research trials on coffee-pruning techniques and pesticide residues in green coffee beans at the Kona and Mealani Research Stations. Information and outreach from both trials will increase farmers’ ability to manage coffee berry borer (CBB) and produce high-quality specialty coffee.

Preliminary results from the first year of harvest in the three-year pruning trial show that single or double vertical, hand-hedged trees provide nearly 1.5 times greater yield in the first season of harvest compared with Kona-style pruned coffee trees, and 3 times greater yield compared with stumped trees. However, pruning, de-suckering, and harvesting the hand-hedged trees also requires about twice as much labor.

CBB can be managed while using all these methods of pruning, provided that there is proper field sanitation in and around the farm and that Beauveria bassiana sprays are well timed and provide good coverage.

Results of the coffee pesticide residue trial determined that a synergist, piperonyl butoxide or PBO, was present in green (dried, unroasted) beans when coffee berries were sprayed up to 105 days pre-harvest. The PBO residues were greater than those allowed by export countries such as Japan. The researchers are recommending that growers avoid using products containing PBO on coffee so as to eliminate the risk of rejection for exported coffee to such countries. Other pesticides tested did not result in detectable residues in green coffee.

Print
Categories: CTAHR NOTES
Tags:

Renaissance Agent

Molokaʻi Extension welcomes Marshall Joy

Positioned for Growth

Thesis explores a clonal rootstock program for cacao in Hawaiʻi

Bad Seed

USDA investigates packages of unsolicited seeds from China

Fire and Rain

SOEST and CTAHR document the first hurricane to cause both flooding and multiple fires.

Bringing UH to Cambodia

FCS joins a $1 million project to study socioeconomic and environmental shifts.

Sweet!

Learn about Native Hawaiian sweet potato varieties

Vegetable Garden Isle

Extension agents feed the hungry with the fruits of their research

Soil Rx

Extension offers conference on soil health

Mama Cows

Agent offers webinar on choosing heifers for cow/calf producers

Fashion Fights COVID

FDM alumna’s fashion-forward scrubs benefit Hawaiʻi Food Bank

The Sponge Microbiome

Zoom in July 28 for a childhood fascination turned hard science

Go(Help)Farm

Positions open at farmer-training program. Deadline is July 17.

World of Plants

Virtual conference offers expanded resources

Honors in the Lab

HNFAS student is recognized for poultry research

Student Columnists

Read all about Family and Consumer Sciences in the Maui News

Contact ASAO

Check out this directory for different services

AI Is Eye-Opening

Mealani Station shares an important technique with CTAHR faculty

Campus Reopening

Provost Bruno will host virtual forum 2:00 p.m. Thursday (TOMORROW)

On-Target Genome Editing

Study aimed at children’s diseases could help boost agricultural production

A Garden Isle Welcome

New county administrator joins the Kaua‘i Extension ‘ohana

‘Awa, Anyone?

Pu‘u O Hoku Ranch offers a CTAHR-exclusive discount

What Lies Beneath…

Find out June 30 how plant roots influence the soil in which they grow

Convocation Memories

Links to Spring 2020 graduation video and grads now available

How Can We Help?

Human Development and Family Sciences develops a quick guide to coping

12345678910Last