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the pest population.
Results:
Following late seeding and early high temperatures, the spring wheat trial yields at Turner averaged nearly 36 bu/ac
(Table 1). For the second year in a row, Northern Seeds ‘NS Presser CLP’ was the top yielding entry producing 40.4
bu/ac. ‘Alum’, ‘Brennan’, ‘Choteau’, ‘Lanning’, ‘LCS Pro’, ‘Reeder’, ‘SY Ingmar’, ‘Vida’, ‘WB Gunnison’ and the
breeding line ‘MT 1651’ all produced yields statistically equal to that of NS Presser CLP. Test weight of all spring
wheat entries was very good for this site, averaging over 60 lb/bu. Following a severe hailstorm in 2014, there were
consecutive years with no sawfly cutting or infestation in the spring wheat trial at Turner, and only minimal cutting in
2017 and 2018. Stand percent, plant height, yield, protein, falling number and sawfly cutting data for the 2018 Turner
dryland spring wheat trial are summarized in Table 1.
Comparable averages are calculated using a standard check variety when not all entries are present in a specific trial
for all years. Variety means are adjusted by multiplying the actual check mean by the ratio of the individual variety
mean compared to the check mean for the same years as tested. All varieties are then directly comparable to each
other when in the same nursery. A minimum of three years of data is necessary to be included in the comparable
average calculation. Nine-year comparable averages (2009-2018) for spring wheat seed yield and test weight at
Turner are summarized in Table 2, while nine-year comparable averages for sawfly cutting are summarized in Table 3.
Loring spring wheat yields averaged just under 33 bu/ac with NS Presser CLP, a 2-gene Clearfield spring wheat,
producing the highest yield at over 40 bu/ac (Table 4). Vida, at nearly 39 bu/ac, was the only other entry to produce a
seed yield statistically equal to that of NS Presser CLP. For the fourth consecutive year, sawfly cutting was virtually
nonexistent in the trial at the Loring site. Stand percent, plant height, yield, test weight, moisture, protein, falling
number and sawfly cutting data for the 2018 Loring dryland spring wheat trial are summarized in Table 4. Nine-year
comparable averages for spring wheat seed yield and test weight at Loring are summarized in Table 5, while nine-year
comparable averages for sawfly cutting are summarized in Table 6.
In 2013, off-station spring wheat trials were re-established near Loma. The late seeding date coupled with the lack of
timely precipitation following seeding, limited spring wheat yields and test weights. Seed yields averaged 32.8 bu/ac
(Table 7). A Syngenta variety, SY Ingmar, was the highest yielding entry at nearly 38 bu/ac. Brennan, SY Soren, and
two Montana breeding lines, ‘MT 1621’ and MT 1651, produced yields statistically equal to that of SY Ingmar. Due to
late seeding, sawfly damage in the spring wheat small plot scenario was low again this year, averaging only 2.6
percent cutting. Stand percent, plant height, yield, test weight, protein, falling number and sawfly cutting data for the
2018 Loma dryland spring wheat trial are summarized in Table 7. Six-year comparable averages for spring wheat
seed yield and test weight at Loma are summarized in Table 8, while six-year comparable averages for sawfly cutting
are summarized in Table 9.
The Chester area received early season moisture, resulting in great spring wheat establishment and prolific tillering to
set the trial up for high yield potential. However, lack of timely rainfall coupled with high temperatures from flowering
through seed set, had an adverse effect on the spring wheat. Seed yields averaged just over 38 bu/ac, while test
weights averaged less than 56 lb/bu (Table 10). Montana State University breeding line MT 1621 was the highest
yielding entry at just under 45 bu/ac. ‘MT 1651’, Brennan, ‘Egan’, Lanning, NS Presser CLP, ‘Oneal’, Reeder and Vida,
yields were statistically equal to that of MT 1621. Sawfly cutting in the small plot scenario averaged just over five
percent in 2018, however, there were three lines that were cut and lodged between 14 and 18 percent. Stand percent,
plant height, yield, test weight, protein, falling number and sawfly cutting data for the 2018 Chester dryland spring
wheat trial are summarized in Table 10. Five-year comparable averages for spring wheat seed yield and test weight at
Chester are summarized in Table 11, while five-year comparable averages for sawfly cutting are summarized in Table
12.
Summary:
Cropping environments for 2018 started out with an abundance of early snow and very good soil moisture recharge,
however, all spring cereal trial sites were seeded later than anticipated due to prolonged snow cover and wet soil
conditions throughout April. Although winter months were wetter than normal, spring and summer months during the
growing season were slightly warmer than average with drought conditions persisting across north central Montana.
Both Turner and Loring received near average rainfall for the year, however the precipitation events were not always
timely. The Turner site was seeded into a mechanical fallow field, as the producer is still dealing with soil drifts from a
windstorm in 2017. The Loma location was seeded into chemical fallow ground that had been minimally tilled to