wheat - Canadian Agronomist

12 Nov Openers and seed treatments investigated in ultra-early wheat

Posted at 18:23h in Agronomy

In ultra-early seeding systems, a disc opener performed marginally better than a knife opener. Few benefits were realized from insecticide/fungicide seed treatments. Previous research found that seeding wheat ultra-early at a soil temperature trigger of >0C provided high, stable yields. The objectives of this subsequent research...

08 Oct Legume contributions to nitrogen nutrition in wheat

Posted at 19:40h in Soils and Fertility

In a grain legume-wheat rotation, belowground residue consisting of roots, rhizodeposits, residual fertilizer and soil-N contributed 70 to 91% of wheat N uptake, with 66% of N uptake from the indigenous soil N pool. Wheat yield was statistically highest following lentil and pea, which were...

09 Sep Alternate forms of nitrogen fertilizer performed similar to urea

Posted at 22:46h in Soils and Fertility

A two year study found that the alternate nitrogen (N) fertilizer sources ammonium sulfate nitrate and calcium ammonium nitrate did not perform any better than urea N fertilizer. Treatment with a urease, nitrification or dual inhibitor had few benefits. A two-year field study assessed the impact...

24 Jun Cut stubble high to preserve wheat stem sawfly parasitoids

Posted at 17:30h in Insects

Most overwintering parasitoid cocoons (>80%) occurred in the bottom third of standing wheat stems from 0 to six inches (0-15 cm). Cutting wheat at six inches or higher at harvest increased Bracon cephi spring emergence by 40%, while cutting just below the wheat head increased...

17 Jun No effect of PGRs on FHB

Posted at 22:42h in Agronomy

Plant growth regulators did not affect Fusarium head blight disease in spring wheat. PGRs could allow growers to select taller, FHB-resistant wheat cultivars while managing plant height and lodging to improve yield. Most cultivars with improved Fusarium head blight (FHB) resistance tend to be taller, but...

16 May Early maturing crops reduce wild oat densities

Posted at 03:30h in Weeds

Early maturing crop rotations that included winter wheat had reduced wild oat populations compared to normal or late maturing rotations. This was likely because of increased crop competitiveness, rotational diversity and possibly harvest weed seed control. The evolution of herbicide-resistant wild oats has made wild oat...

13 May Ergot trends in Canada

Posted at 20:18h in Disease

The highest ergot incidence and severity occurred in rye, followed by bread and durum wheat, barley and oats. Ergot incidence has increased in the last decade, but severity has not increased and remains low. Ergot is a fungal disease that is caused by the pathogen, Claviceps...

08 May Stripe rust control in spring wheat

Posted at 19:40h in Disease

For susceptible and moderately resistant varieties sown in mid-May, a foliar fungicide application at mid-anthesis will help preserve yield and quality. When susceptible and moderately resistant varieties are sown in early June in central Saskatchewan, fungicide application at stem elongation or mid-anthesis was equally beneficial...

04 Mar Factors affecting FHB impact on hard red spring wheat quality

Posted at 21:16h in Disease

Rainfall was the most contributing factor to Fusarium Damaged Kernels. Glyphosate application did not affect grain quality or Fusarium Damaged Kernels. Fusarium head blight is one of the most damaging diseases on hard red spring wheat on the Prairies. A research study led by the University...

29 Jul Overwinter wheat stem sawfly mortality unaffected

Posted at 23:13h in Insects

Wheat stem sawfly larval mortality did not occur between fall and spring sampling periods indicating that populations are not affected by abiotic or biotic factors during the winter. The populations of wheat stem sawfly and its natural enemies varied across fields in southern Alberta. The...