By Cerese Bawolin, B.Sc., Plant Health Tech, Regina
The Crop Protection Lab received 65 sample submissions in July. The samples submitted include wheat, durum, canola, field peas and lentils. Other submissions included trees such as juniper, ash and apple.
This July, significant crop disease diagnosis were fungal diseases on cereal crops, including tan spot, septoria, fusarium head blight, stagonospora on durum and net blotch of barley. Other diseases of note were field peas with downy mildew, septoria and root rots.
A summary of Crop Protection Laboratory samples diagnosed in July 2022 is in Table 1.
| Plant | Diagnosis |
|---|---|
| Apple | Apple Scab Silver Leaf |
| Barley | Net Blotch |
| Barley | Bacterial Growth |
| Elm | Dutch elm disease |
| Green ash | Environmental stress |
| Juniper | Environmental stress |
| Chickpea | Environmental stress |
| Durum | Fusarium Head Blight |
| Field Pea | Fusarium Root Rot |
| Coriander | Herbicide Damage (Group 2) |
| Lentil | Herbicide Damage (contact membrane disruptor) |
| Canola | Herbicide Damage (Group 2) |
| Mustard | Herbicide Damage (Group 2, glysophate and Group 14) |
| Oats | Herbicide Damage (Group 1) |
| Canola | Herbicide Damage (Group 2 and Group 4) |
| Field Pea | Root rot complexes (fuarium, oomycetes and rhizoctonia |
| Field Pea | Downey Mildew |
| Field Pea | Septoria |
| Durum | Septoria/stagnospora leaf blotch complex |
| Durum | Tan Spot |
| Wheat | Tan Spot |
| Wheat | Fusarium Head Blight |
Dutch Elm Disease (DED)
The laboratory received a total of 187 DED samples for testing. So far, there are 43 DED positive samples and 14 Dothiorella wilt positive samples. Saskatchewan residents who suspect DED are encouraged to send samples in for testing free of charge. The instructions for sending in an appropriate sample and submission forms are available on our website. We would also like to remind Elm tree owners that our deadline for DED sample submissions is August 30, 2022.
Weed Identification
An identified weed of note this July was leafy spurge. It has been prevalent in Saskatchewan and is a noxious weed that originated from Eastern Europe.
