• A-Z
  • Directory
  • myUVM
  • Loading search...

What's Hoppening: Musings from the Hopyard!

Hops and Your Health

Posted: January 6th, 2015 by hoppenin

Happy New Year!

The folks at Michigan State University Extension are offering a webinar on Tuesday, January 13  at 1 pm ET called, “Your Lungs, Your Life: Respiratory Disease in Hop Growing and Processing.”

The one-hour webinar will include speakers Carolyn Whitaker and Dr. Dave Bonauto from the Washington State Department of Labor and Industries Safety & Health Assessment & Research for Prevention (SHARP) Program.

In this webinar, you will learn how to keep your lungs healthy while growing and processing hops. It will cover what to watch for, when to see a doctor, hop jobs associated with respiratory disease, and what you can do to protect yourself and employees.

No registration is required and the program is free. Simply click the following link five minutes before the webinar is scheduled to begin https://connect.msu.edu/erinlizotte. Please sign in as a guest using your first name and state of residence. You will need a computer with internet access, a web browser (e.g. Explorer, Safari) and speakers. Don’t worry if you aren’t available on January 13th, the webinar recording will be made available at hops.msu.edu.

Holiday Closing of Testing Lab

Posted: December 19th, 2014 by hoppenin

holidayhopPlease note that the UVM Cereal Grain Testing Laboratory will be closed for the holidays beginning Monday, Dec 22, 2014 and reopening Monday, Jan 5, 2015. It would be best to hold on to your hop samples until after the 5th. Thanks.

Best wishes for happy holidays! And, keep calm and hop on…

WCAX Highlights Hop Research

Posted: October 6th, 2014 by hoppenin

Hey all, If you haven’t seen it yet, WCAX, our local CBS affiliate, highlighted our hop research in a recent “Sunday Science” feature. Take a look!

Sunday Science: Researching local hops – WCAX.COM Local Vermont News, Weather and Sports.


Preparing Hop Samples for Quality Analysis

Posted: September 3rd, 2014 by hoppenin

Happy hop harvest everyone! As you may know, our University of Vermont Extension Hop Quality Testing Laboratory is now up and running. We want to thank everyone for supporting the lab! We have received many samples over the last few weeks.

As samples have been coming in, however, we have noticed that many are above the recommended 8% to 10% moisture level for storage. Unfortunately, samples that exceed these moisture levels are very difficult to process and analyze. For example, it is almost impossible for us to grind the sample properly, leading to broken equipment.

good hop sample

Pictured above: Ground sample of hops dried to the proper moisture level of 8% to 10%. Note how the sample is light and crumbly. This is what we’re looking for!

bad hop sample

Pictured above: Ground sample of hops that have too much moisture. Sticky, clumpy, almost sausage-like appearance.


Unfortunately, these types of samples also lead to inaccurate test results. So, before sending in your samples, please make sure they are dried properly. Here are some tips for preparing and submitting a hop sample.

1. We require 100 grams of hops, dried to 8% to 10% moisture level. Once you have dried down the hops and they are removed from the dryer, let them sit for a bit to cool to room temperature to let any heat dissipate from the hops. If samples are packaged immediately after removing from a heated dryer, they will likely condensate in the package and increase the moisture content of the hops. You can refer to our Hops Harvest Moisture Determination factsheet and Hops Harvest Moisture Online Calculator for help with hop dry matter determination. You may also visit our YouTube video for some reminders about determining dry matter: Determining Hop Harvest Moisture and Ideal Storage Dry Matter.

2. For the best test results, samples of dried hops should be frozen and/or packaged to avoid oxidation (ziploc or vacuum sealed) and shipped overnight. Please remember to plan your shipping so that your sample arrives to the lab during the work week between 8 am and 4:30 pm. Samples that arrive to the lab over the weekend are not opened until Monday.

3. Please make sure to complete a Sample Submission Form and include payment ($30 per sample).

The turnaround time for test results are 7 to 10 business days; we email the results to you unless requested otherwise. Thanks so much and hop on!

Hello Hop Harvest!

Posted: August 14th, 2014 by hoppenin

hop harvest 8.12

We tested ~ 30g of our early varieties on August 8th and harvested our first Saaz plot of the season on August 12th at the research hopyard in Alburgh, VT. Several of our early and mid-season varieties are ready to harvest.

Please continue to practice meticulous hop processing so that our local brewers have excellent hops this year!



A few harvesting tips to ensure high quality:

  1. Take pre-harvest moisture samples (see our Hop Harvest Readiness Factsheet)
  2. Cut down only what you can pick that same day
  3. Keep your cut hops out of the sun
  4. Dry your hops to 8% moisture
  5. Seal your dried hops or pellets and freeze

Check out our easy to use online harvest moisture calculator or download your own copy.

Hoppy Harvesting!


Having trouble with Japanese Beetles?

Posted: July 28th, 2014 by hoppenin

Take a deep breath; help is on the way!

Figure 1. Japanese beetles with winsome fly eggs on their thorax (Scott A. Lewins)

While scouting a hopyard in central Vermont, UVM Extension Entomologist Scott Lewins photographed these Japanese beetles last week with some deadly companions on their backs (Figure 1). The white dots on the thorax of the Japanese beetle in the picture are eggs of a parasitic fly brought here years ago to help control this destructive invasive species.

The winsome fly, Istocheta aldrichi  (Figure 2), is a parasitic fly native to Japan, where it is one of the most effective parasites of Japanese beetles. Female flies lay their eggs on the thorax of newly-emerged Japanese beetles. After the eggs hatch, the parasitic maggots burrow into their Japanese beetle host, killing them in five to six days. The beetle rapidly dies as the maggots eat it from the inside out. This often means that the targeted beetles never reproduce. The fly completes its lifecycle within the body of the dead beetle, emerging the following year.

Figure 2. The adult winsome fly (http://bugguide.net/node/view/346199)

The USDA first introduced the winsome fly in the United States in 1922 to try to combat Japanese beetles. Their introduction has been slow to take hold throughout the US, but has become well-established in New England since their introduction. The winsome fly and Japanese beetles are not as well-synchronized within the US as they are in their native Japan. Unfortunately, the fly emerges earlier than the beetle so we don’t realize the full benefit of Japanese beetle control. Despite this asynchrony, parasitization rates of more than 20% have been observed.

In order to encourage winsome flies in the landscape, there are ways to manipulate the habitat to benefit them. Adult flies feed on the nectar of umbelliferous flowers like yarrow, hemlock, Queen Anne’s lace and parsnip. Providing food sources for adult flies will attract them to the area, and when Japanese beetles begin to emerge, the winsome fly will be ready to do what it was brought here for.

For more information on Japanese beetles and their management, check out the following article on Japanese beetles:http://www.uvm.edu/extension/cropsoil/wp-content/uploads/Japanese_beetle_in_hops.pdf. For more information on hops in general visit us on the web at www.uvm.edu/extension/cropsoil/hops.

Field Day Hop Irrigation Guest Speaker

Posted: July 21st, 2014 by hoppenin

We are excited to announce that Trevor Hardy from Brookdale Fruit Farm will be at our Annual Crops and Soil Field Day THIS THURSDAY, July 24th in Alburgh, VT.  He owns an irrigation company in Hollis, NH and will be sharing his expertise on the important topics of irrigation and fertigation.

Please join us!


July 2014 Hop Update

Posted: July 14th, 2014 by hoppenin

Disease: Downy mildew is our biggest pest problem this year in Vermont. Due to the lasting rainy weather, we continue to see aerial and basal spikes appear. For disease control in the Alburgh, VT research hopyard, we spray an organic fungicide weekly. We also have a new crowning trial this season that you can check out at our field day on July 24th at Borderview Farm!

Arthropods: On the arthropod side of pest management we have been finding medium levels of the major hop arthropod pests in Vermont. Hop aphids, two spotted spider mites, and potato leafhoppers are all present, yet have remained well below actionable levels. The harsh, long winter that our region experienced this year is certainly part of the reason for lower arthropod populations. A few Japanese beetles and various caterpillar species (Eastern comma and hop looper) have also been scouted. As a result of not applying insecticides thus far in our research yard, we have been able to avoid secondary outbreaks of spider mites and aphids. When broad spectrum insecticides are sprayed, beneficial arthropods are killed allowing pest arthropod populations to increase rapidly. See our major and minor arthropod pest fact sheets on our website under News from the Field.

Early Hop Cones: It has been observed across the country that cones are developing early. In our hopyard, ‘Saaz’ as of July 1, 2014 already had full sized cones and will be ready to harvest in a few weeks. It is unclear as to why we are seeing this trend but it is nationwide. Tell us what you’re seeing on our UVM Extension Crops and Soils facebook page!


Posted: June 19th, 2014 by hoppenin

We began irrigating on the week of June 1st and will continue to irrigate until harvest at the end of August. Hops require a lot of water! We strongly recommend that you irrigate, and once you are done, irrigate some more. Chris Lattak of the Trickl-eez irrigation company recommends 16 gallons per plant per week. That’s a hard number to hit – we won’t be reaching it because we’d run the well dry – but it’s a good goal. For evidence to the value in irrigation, see this recent SARE grant study from Aroostook Farm in Maine: http://www.aroostookhops.com/uploads/SAREFinalReport2012FNE11-711.pdf.  This year we also added a fertigation system, which applies fertilizer through the drip irrigation. The fertigation started the week of June 9th. More information to come on our fertigation system.

Downy Mildew Management

Posted: June 9th, 2014 by hoppenin

We have been receiving inquiries as to Downy Mildew diagnosis and management techniques. Our Downy Mildew fact sheet (Link is below) has quite a bit of information that can be helpful. As always, please contact us if you have specific questions, or if we can elaborate on anything found within the fact sheet.


Keep calm and hop on



Contact Us ©2010 The University of Vermont – Burlington, VT 05405 – (802) 656-3131
Skip to toolbar