Harvest delays brought on by this summer’s catchy weather have underlined the importance of growing winter wheat varieties that aren’t late-maturing, says Syngenta technical manager for conventional cereals, Kathryn Hamlen.
Earlier maturity could also be especially relevant if intending to delay drilling to reduce pressure from barley yellow dwarf virus, fungal diseases or grass weeds, she adds.
“This summer saw reports of grain sprouting in ears where crops couldn’t be harvested in time before the rains arrived,” says Mrs Hamlen.
“You don’t necessarily have to grow the very earliest-maturing winter wheat – maybe something rated zero for ripening on the AHDB Recommended List. Even just a few days’ earlier harvesting could provide an important safety margin against unpredictable summer weather.
“If you are considering delaying drilling, against barley yellow dwarf virus for example, this sort of earlier ripening becomes even more significant. That’s because later drilling inevitably tends to push harvest date even further back.”
Besides maturity, another increasingly noteworthy characteristic to consider in winter wheat, given rising concerns about controlling unpredictable yellow rust outbreaks and Septoria tritici, says Mrs Hamlen, is varieties that don’t have long intervals between fungicide spray timings, such as T1 and T2.
This is important to ensure fungicides don’t run out of steam between applications, she says, leaving plants exposed to infection.
“Trials observations show that because they are fairly late to reach growth stage 30 and relatively early-maturing, the winter feed wheat varieties Gleam and Graham don’t tend to suffer from stretched spray intervals. They also have good disease resistance.
“Both varieties have also delivered fantastic yields in trials in the 2019 harvest, and the performance from Gleam in its first year on farm this last season has been excellent.
“In Syngenta trials, Gleam has also shown the smallest yield penalty of all varieties tested from delaying drilling from September to the last week of November. Gleam also performs well as a second wheat, which is another situation where drilling is likely to be later,” she adds.
Photo: Kathryn Hamlen in winter wheat
If you are looking to use delayed drilling against problems such as barley yellow dwarf virus, varieties with relatively early ripening could be even more important, says Syngenta technical manager, Kathryn Hamlen