Diagnosing calcium deficiency in canola
Calcium deficiency ('wither top' or 'tipple topple') is occasionally seen in canola at stem extension. However its incidence is patchy within a paddock, and the plant often recovers, so it is considered to be of little economic significance.
What to look for
- Withered flowering heads that tends to be worse on shallow acidic soils such as shallow gravels, and in wetter areas with high rainfall spring weather.
- The flowering stalk collapses causing withering and death of the flowering head.
- Side branches often develop normally when soil moisture condition returns.
- Some varieties appear to be more susceptible than others.
What else could it be
|Diagnosing group B herbicide damage in canola||Flowering head death||Herbicide affected plants have leaf symptoms and plants usually slowly die.|
|Diagnosing glyphosate damage in canola||Flowering head death||Herbicide affected plants have leaf symptoms and plants usually slowly die.|
Page last updated: Friday, 20 June 2014 - 1:23pm