SOUTH-CENTRAL ND CROP SCOUT REPORT†††††††

 

The NDSU Extension Service annual crop scouting program in south-central North Dakota began the week of May 28. The emphasis of the scouting is for disease and insect presence in small grain. On May 30-31, 22 fields (2 barley, 1 winter wheat, and 19 spring wheat) were checked in Stutsman, Logan, McIntosh, Emmons, Burleigh, and Kidder counties. Winter wheat was in the jointing stage and the spring crops were in the tillering stage. Tan spot was found in 7 of 20 (35%) wheat fields. The highest tan spot incidence (92-94%) and severity (6%) were in wheat planted on last yearís wheat ground. The other five fields with tan spot had low incidence and severity. Young grasshoppers were prevalent in field margins near 15 of 22 (68%) scouted fields.

(Jerry Schneider)

 

SUNFLOWER PLANT POPULATIONS

 

NDSUís recommendation for sunflower plant populations:

Oil

*30-inch rows = 18,000 to 24,000 plants/acre; solid-seeded= 22,000 to 26,000 plants/acre

Confection

*14,000 to 20,000 plants/acre

Seeding rate should be 10 to 20 % higher than targeted stand. Minimum stands may be as low as 50 to 60 % of normal stands.

 

Research was conducted by NDSU at Casselton and Minot in 1996-98 to examine response of oil and confection sunflower to row spacing and plant populations. Across locations, years and row spacings, average seed yield from the study is shown in the following table:

Oilseed

 

Plants/acre

Seed yield

lb/acre

% of 18,000 plants/acre

18,000

2315

100

22,000

2265

97.8

26,000

2185

94.4

Confection

 

Plants/acre

Seed yield

lb/acre

% of 14,000 plants/acre

14,000

1960

100

18,000

1950

99.5

22,000

1935

98.7

In summary, these data indicate no seed yield advantage with established stands above the low end of the recommended range in plant populations. When choosing targeted sunflower populations, also consider other factors such as seed size, weight, and dry-down time. More details on the oilseed portion of this study may be found at the following website:

www.ag.ndsu.nodak.edu/aginfo/procrop/sun/pltrws05.htm.