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Disease Management


Under Article 14 of the Sustainable Use Directive, 2009/128/EC, member states are required to promote IPM to suppress harmful organisms using a range of options and to only use pesticides when necessary.

Using Latitude seed dressing can be an important part of an IPM approach and should be based on risk assessment. Use the take-all risk assessment guide to check risks from rotation, climate, sowing date, soil type, pH and a range of more minor risk factors.
 
Download the IPM take-all guide here
 
Risk Assessment

When assessing take-all risk, rotation accounts for 33%, region accounts for 34%, soil type for 16%, and sowing date for 17%.

Rotation - 33% risk

Some commercial crops are more susceptible to take-all than others, high risk crops will allow the build up of inoculum in the soil.


ˆGrass: Ploughed-up permanent grassland can have an effect even further back in the rotation, due to the increase in soil organic matter.  Risk may be less after a good clean Rye-grass ley because of the action of fungal antagonista (phialophora spp>)
*Non-cropped land: Risk is increased by the amount of cover from cereal volunteers and rhizomatous grasses (e.g. Couch) and a short time interval between destruction of such cover with Roundup or cultivation and drilling.
+Roots: Risk is increased in second wheat crops if conditions at lifting caused damage to soil structure.

Region - 34% risk

Good conditions for take-all development are more likely in certain regions, based on soil temperatures and moisture levels.  Warm damp soils encourage fungal growth, areas where these conditons are more likely to occur may experience higher take-all levels.


Source: Conditions required for take-all development by region 1979-2000.
Based on Monsanto FARModel using records of temperature and moisture data

Soil - 16% risk


Source: Average take-all levels from 415 European field trials with full soil textural analysis
Note: Soil textural information must be interpreted with great care.
1 Some Silty Clay Loams (e.g. Andover series) are low risk while others (e.g. Bromyard series) are not.  Generally take-all can be severe in wet seasons on soils with high silt content (e.g. Fen or Old Red Sandstone).
2 For Clays and Clay Loams risk is related to chalk content.  Well structured Chalky Boulder Clays (e.g. Hanslope series) are relatively low risk soils, poorly structured Clays (e.g. Ragdale series) restrict rooting and favour infection.
3 Very light soils (e.g. Bunter Sandstone) are high risk - except in very dry seasons.
4 Black Fen (Peat and Loam Peats) are very high risk due to their open puffy nature.

*Take-all can be associated with acid patches
**On Organic soils (>6% OM) the relative importance of soil to overall risk is greater.

Sowing Date - 17% risk
Infection can be more severe the earlier the crop is drilled, due to prolonged exposure to the disease.

Source: 133 UK Monsanto field trials mainly from second or third wheat crops.  First wheat crops will be at risk after non-cropped land or spring barley will be at risk from early to mid September drilling dates.

For further information and other risk factors please refer to the Take-all Risk Assessment Guide