ISSUE 4 May 26, 2005
During the past week (May 18 to 24), the south-central regionís rainfall ranged from 0.04 inches at Robinson to 1.5 inches at Jamestown, as recorded at NDAWN (North Dakota Agricultural Weather Network) sites. The regionís soil moisture is currently adequate with some areas excessive. Corn planting is essentially complete and plants have emerged if planted on or before about May 10. Soybean planting is nearly completed and the majority of dry bean and sunflower acres should be planted by Memorial Day (if we have cooperative weather!). Flag leaves will be appearing soon in winter wheat. The regionís small grain, field pea and corn fields generally have good to excellent plant stands. The majority of the regionís spring wheat crop is in the tillering stage (3 to 5 leaf). Weed development has accelerated along with crop growth and herbicide application in small grain is a common activity as weather permits.
Early-season foliar fungicide application on wheat. The strategy of a foliar fungicide tank mixture with herbicides for application to tillering wheat is quite common. Factors that provide the greatest potential for response from this early fungicide application include wheat residue present in the field, a wheat variety grown that is susceptible to leafspot disease, favorable weather for disease occurrence, and tan spot present on wheat leaves. A currently-labeled fungicide list and application details can be found in the Issue 2 disease section of the 2005 ĎCrop and Pest Reportí.
At the NDSU Carrington Research Extension Center, three wheat fungicide trials were conducted during 2003_04 that included fungicide treatments at the 4_5 leaf and at early-flowering stages. The trials were conducted under irrigation on previous yearís soybean ground, but with wheat straw spread in the trials as a disease inoculum source. Significant leaf disease and scab were present in the trials. The 3_year average wheat yield with the untreated check was 50.1 bu/acre with 58.3 lb/bu test weight. The tillering-stage fungicide application (3 fl oz/acre of Headline or 5 fl oz/acre of Stratego) resulted in yield of 54.5 bu/acre with 58.5 lb/bu test weight. A sequence of tillering and early-flower stage fungicide (Folicur at 4 fl oz/acre) application resulted in 63.3 bu/acre with 59.2 lb/bu test weight.
Area Extension Specialist/Cropping Systems
NDSU Carrington Research Extension Center
The region received from 1 to 2 inches of rainfall in the last week. Extremely wet soil conditions north of highway 66 and east of highway 1 and in the Rolla area has prevented most planting the last two to three weeks. Cool season crop planting south of highway 66 is nearing completion. Soybeans , sunflower, and dry bean planting is common. Earliest planted wheat is in the four leaf stage. Wheat and barley planted the second week of May is emerging. Flax and canola are emerging with mostly good stands obtained. Earliest planted corn is emerging. Some reports are coming in of flax reseeding, due to initial deep seeding that resulted in poor stands. Wild oat and early broadleaf weeds are emerging and initial post emergence spraying has started this week on winter wheat and earliest planted spring wheat. Alfalfa growth in areas of poor winter snow cover is progressing slower than normal.
Area Extension Specialist
Devils Lake Area Office