Leaf rust spots have been observed in fall rye as well as a few spots resembling Septoria leaf spot.
Leaf rust spots on fall rye, 2014. Photo courtesy: Vikram Bisht, MAFRD
Blackleg spots can be found on canola foliage.
Remember to collect samples or notify someone from MAFRD if you are noticing cereal leaf beetle in cereal crops. Levels are quite low in Manitoba, however we are doing a release of a parasitoid that is very effective at keeping cereal leaf beetle at low levels. The samples of larvae will be sent to AAFC in Lethbridge, where they will be examined for parasitoids. Areas of Manitoba where larvae are present but not already containing parasitoids will be given priority for parasitoid releases.
Larvae of cereal leaf beetle.
Submitted by: John Gavloski, Entomologist & Vikram Bisht, Pathologist, MAFRD
Is it okay to seed fall rye back into rye stubble? I know the deadline to seed is Sept 15. Are there any pro/cons to seeding, say Aug. 15? How does rye do in loam soil? I’m thinking of doing a test plot on some land where I’ve never grown it before.
It is not recommended to follow fall rye with either fall rye or winter wheat because of problems with volunteer rye. Also, if ergot has been an issue, you should follow with a non-susceptible crop for at least a year. Fall rye is best seeded into stubble from a previous non-cereal crop that will allow trapping of snow to reduce winterkill risk.
Seeding fall rye too early usually results in reduced yield and lower 1,000-kernel weight. On the other hand, seeding too late can result in reduced yields, delayed heading, later maturity and lower bushel weight. Fall rye should normally have two to four leaves and up to one tiller before freeze-up, which generally means optimum seeding is in late August-early September. Insurance seeding deadlines for fall rye are Aug. 15 to Sept. 20 (full coverage), with an extended seeding period to Sept. 25 (20 per cent reduced coverage). For more information, contact your MASC agent.
Fall rye is adapted to a wide range of soil types and conditions. It’s a good choice for light, sandy, erosion-prone land, but will respond to better soil types and fertility.