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Current disease situation in winter wheat

8 April 2019

Bayer's 'disease monitoring 2019' started in week 14. A total of 54 plots, spread throughout the Netherlands, are checked every 2 weeks for the presence of diseases.

The good sowing conditions in the autumn of 2018, followed by a mild winter, provide a fantastic starting situation for a nice winter wheat season. The wheat developed early and many plots are now in the establishment/first node stage. In fact, early sown plots in the south of the country are already at the second node stage or beyond. The disease pressure is low.

Septoria, yellow rust and mildew 
As always, some septoria can be found on almost every plot, at the bottom of the crop, but the pressure is low. The crops usually look beautiful and healthy. Depending on the variety sown, some sporulating yellow rust is found on the old leaf at the bottom. So be careful in sensitive varieties, because that yellow rust can develop quickly. Mildew is found on a single plot in the southeast of the Netherlands.

Examples of beautiful, healthy wheat. On the left a plot in Paesens (Friesland) and on the right in Windraak (South Limburg).

Go for high yields
Wheat is at least 2 weeks ahead of 2018, which was also an early year. Hopefully it won't be so horribly dry in the summer. Now it will mainly be a matter of keeping the wheat productive for as long as possible. In terms of development, many plots are already ready for the first disease control, while this is normally only the case at the end of April.

However, the flag leaf stage can still take weeks. This means that we have to divide this (hopefully) very long growing season into 3 spraying times. This is to keep the intervals from getting too big. Do not unnecessarily postpone a first spraying: 'hit hard and hit early!' Cleaning wheat now makes it much easier in the future to keep the crop healthy (for longer).

Depending on the variety (including Benchmark, Reform or Kelvin), active yellow rust can sometimes appear on the older leaves.

Advice spraying T1: Xpro (Aviator, Skyway or Ascra)
All Xpro products are characterized by the balanced mix of powerful, active substances and an excellent formulation. Choose a strong foundation with maximum yield.

The graph below shows the disease pressure per year and per disease in 3 classes: free of disease, slightly affected (1% to 50% of the plants) and heavily affected (51% to 100% of the plants).

The average disease pressure (in week 14/15) in the years 2016 to 2019.
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