Aerial spraying is an alternative when ground-based sprays cannot be used. Disease control Root diseases, particularly take-all of wheat and barley, are often more severe in waterlogged crops because the pathogens tolerate waterlogging and low oxygen levels better than the crops. Leaf diseases are likely to be more severe in waterlogged crops because the crop is already under stress. Spraying may be an option after the site has dried, but only in crops with a high yield potential. Farm planning Drainage to remove as much excess water as possible will minimise waterlogging, weeds, nutrient deficiency and disease.
Drains also reduce the variability in yields within a paddock.
A special edition on waterlogging and drainage. Identifying gypsum responsive soils '.