Onspecialtycrops information for commercial specialty crop production in ontario list of best universities in nigeria

Over the last few days I’ve had enquiries from hop growers regarding lower than anticipated alpha acid levels in the 2018 crop. One of the first options for any grower concerned with hop resins testing outside of the reported range is to consider sending a second sample for testing at a different facility ( hop testing facilities). This will ensure the initial test results are correct.

After confirmation of test results, the next stage is to reflect on the environmental conditions of the year and the cultural management practices used through the growing season. American university apparel A preliminary search of the scientific literature revealed a general consensus that environmental conditions (such as those recorded in many ontario regions during the 2018 growing season) can affect the formation of alpha acids in some hop cultivars.

• temperatures during the month of july appear to affect alpha acid formation the most in terms of timing of impact on alpha acid formation (many studies suggest the largest impact of environmental conditions on alpha acid development in the month of july, however, they can also be influenced during the months of may-august).

• in some regions, alpha acid synthesis is correlated to temperatures between the dates of may 24 and june 21, other regions documented july temperatures as the most important, while still others showed august. Generally, across studies, july (cone formation) and early august (cone maturation) were the most important times of influence on alpha acid formation.

• optimal temperatures for alpha acid development occurred in the range of 15-17 o C. Alpha acid synthesis decreased above or below these temperatures. Uni in the negative impact of temperatures above 20 oc on alpha acid formation can be compensated with increased irrigation to some degree.

In the short term, I have yet to find a replicated study evaluating the impact of environmental conditions on alpha acid formation in US cultivars such as ‘cascade’. Hopefully more information can be found on this topic and will be added to this posting.

In the long term, it appears that monitoring soil moisture levels and being vigilant with irrigation practices, especially during higher temperature days, is important to maximize alpha acid formation in hops (or at least help to minimize the negative impact of higher temperatures on alpha acid formation) under ontario growing conditions.

As we draw closer to the 2018 hop harvest season, grower reports from across the province suggest the crop is anywhere from one week ahead of normal to one week behind normal depending on cultivar and geographic location/growing zone. Here is a re-blog of some harvest guidelines posted in 2017:

As hop harvest approaches each year, questions arise about harvest timelines for specific cultivars grown in ontario. Since hops are a re-emerging crop in the province, only preliminary information has been collected from replicated trials. American university fraternities here are a few guidelines and suggestions for planning your hop harvesting schedule this year.

Target 20% dry matter in hop cones. Moisture levels for some cultivars may be optimal at a slightly higher or lower dry matter percentage, but most fall within 20 ± 2% range. By targeting initial harvest at 20% dry matter, larger fields taking more time to harvest or cultivars being harvested over multiple days will hopefully be completed within an acceptable moisture range.

Historical harvest records can help to schedule cultivar-specific harvest windows in your growing area but should always be confirmed with moisture tests. List of best universities table 1 depicts harvest timelines over two years for 10 different cultivars grown in a randomized and replicated trial at the simcoe research station, norfolk county, ontario. This table can be used as a guideline to better understand when specific hop cultivars may be maturing in your part of the province. Keeping your own harvest records will help fine tune harvest dates in your particular growing region. Table 2 outlines the same cultivars with harvest dry matter, yield in kg/ha after drying and resulting alpha and beta acid ranges.