By Scott Hartley, PAg Manager, Crop Protection Laboratory, Regina
The Crop Protection Lab continued to be busy with incoming samples in the second half of July. Although sample submissions for unspecified diagnoses declined toward the end of the month, Dutch Elm Disease (DED) submissions are on the increase.
The Lab received a total of 189 samples as of Aug. 9, with 41 samples received in the last two weeks of July and early August. The latest submissions diagnosed have included weed and insect identifications and one lentil sample with anthracnose. Herbicide injury or carryover accounted for five samples, and seven were diagnosed with various root rots. Environmental stress was diagnosed in some of the samples, the majority with moisture stress, soil fertility and salinity issues, as well as other abiotic factors.
A total of 264 samples have been received for DED and Dothiorella Wilt of elm. More than 150 have been received since mid-July. Plating for diagnosis has indicated similar to previous years, with about 50 per cent of the samples resulting in positives for the disease.
The Fusarium Head Blight Survey is well underway. Samples are collected by Saskatchewan Crop Insurance Corporation field personnel and submitted to the Crop Protection Lab for diagnosis of Fusarium present in wheat, barley and oats. About 100 samples from the 20 Crop Districts have been received.
Weed samples for herbicide resistance testing are already being received. Seeds have to be mature and in sufficient quantity and quality for the assessments. Testing will not begin until the new year due to seed dormancy.
Forms and information on submitting samples for all testing are available on the Ministry website.