Take-all in winter wheat - management guidelines (HGCA Autumn 2006)

Factors influencing take-all

Environmental

Weather

Regional differences in take-all relate to weather, soil type and cropping systems. Take-all is most prevalent in eastern England, where cereal-dominated rotations are most common. Severe infections also occur in the west and south-west, but wetter weather during grain filling means the effects are often less severe.

Take-all development is encouraged by a warm winter followed by a wet spring/early summer. Yield loss is increased by dry conditions during grain filling, which exacerbate the damaging effects of the disease on root function (Figure 2).


Figure 2. Effect of soil moisture on yield in a severe take-all epidemic

ADAS Rosemaund

A first wheat crop usually appears to remain healthy. However, moist soil during the growing season will encourage inoculum build-up. This will impact on following crops. Favourable weather for disease development in successive years leads to severe 'take-all years'. More rarely, runs of unfavourable weather over several years can result in crops in which take-all is almost absent.

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