Clayton J Nevins

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​Burrs and Cones. Both of the trellises in the Boiler Hopyard have begun flowering and coning. The primary shoots were pruned at the top of the net on the dwarf trellis in order to promote lateral growth. The pruning took place on May 19 and again on May 28. The bines on the dwarf trellis have been flourishing with flowers and now cones. Out of the six cultivars in the hopyard, Galena was the first to reach the top of the dwarf trellis and begin flowering. The tall trellis began flowering in early June along with the dwarf trellis, but after adding the last dose of nitrogen the plants in the tall trellis began putting on more vegetative growth, including lateral branches. This appeared to delay flowering and allowed for more lateral growth development. The plants in the tall trellis are now in full bloom and appear to be several[Read More…]


Shoots infected with downy mildew.

​Purdue University’s Boiler Hop Yard has started its second growing season with the hopes of providing Indiana growers with science-based recommendations for hop production in the Midwest. With summer rapidly approaching, hop bines are now climbing over 10 feet high in portions of Indiana, and the Boiler Hop Yard is no exception. Downy Mildew. One of the biggest threats to Indiana hop production is downy mildew. Downy mildew (Pseudopernospora humuli) can cause hop quality to depreciate, yield to be stunted, and sometimes even plant death. Downy mildew was identified in the Boiler Hop Yard in mid-April this year, and is present in other Indiana hop farms as well. Downy mildew overwinters in the crown of the hop plant, and appears in the early spring on newly emerged primary basal or aerial spikes as a sidearm (Figure 1). These spikes have irregular growth patterns and are undesirable in hop production. The[Read More…]


2015 Hop yards in Indiana. Established yards are represented with gold stars and planned hop yards in green.

Background. Rapid growth in the craft beer industry is stimulating Indiana’s economy and creating an opportunity for Indiana farmers to start growing hops. In 2012, the Indiana craft brewing industry contributed over 600 million dollars to the state’s economy. The industry continues to grow, increasing from 63 breweries in 20131 to nearly 100 in 2015, and housing over 6,000+ full-time employees2. Hop production has increased over 10% since 2013, with the hops industry in Indiana being no exception3. Hop production currently occurs predominantly in the Pacific Northwest, with Washington state leading production at (74%) of the total acreage, followed by Oregon (14%), Idaho (10%), and the rest of the country (2%). However, many hop yards have now taken root in Indiana, with many additional yards currently under construction (Figure 1). Hops (Humulus lupulus). Hops are a perennial crop essential for beer production – imparting bitterness and aroma. The plants produce[Read More…]