Field and trials experience ensures confidence with Caryx

Article taken from CPM

In 2013, there weren’t many OSR crops that needed lodging control, but Shrops-based Agrovista agronomist Rob Hughes identified a couple of crops that warranted an application of Caryx to provide some targeted lodging control and canopy management.

“It wasn’t so much that they were forward.  It was a year when OSR was all over the place, and the growth within the fields was very variable.  I felt that an application towards the later timings for Caryx would even up the crops,” he says.

A 64ha block of DK Extrovert and Expower received 1 l/ha of Caryx, while 45ha of PR46W21 received 0.7 l/ha.  “The DK varieties got the higher rate because I felt they’d be more likely to lodge.  PR46W21 is also a tall variety and would benefit straw strengthening.

“Caryx was applied just before yellow bud, so this was mainly about improving the canopy that would produce more seeds/m².”

Previously, he’d relied on Sunorg Pro to provide any plant growth regulation or canopy management.  “I wanted to see how Caryx would fare at the later timing as it had provided good canopy management in trials, so included no fungicide with PGR properties with it.  Galileo (picoxystrobin) was used with the Caryx to provide a physiological stimulus and early sclerotinia cover and some foliar nutrients were also added.”

The Caryx produced the desired effect, he reports.  “The crop did even up well, and went on to yield respectably.  But there was a lot of variability with other crops in the area.”

Rob Hughes admits he was “feeling his way” with the product in its first commercial year.  “But we’ve had it in the Agrovista trials programme, so I’d already seen how it performed and how best to use it.”

This year with winter OSR, his main priority will be to use Caryx to reduce apical dominance, to bring a reduction in crop height and so reduce lodging.  Across the 800ha of OSR Rob Hughes looks after, he reckons about half to two thirds will benefit from Caryx.

“Not all the crops are so forward, and there are a significant number of crops with semi-dwarf varieties – I’m still in the process of deciding whether these would benefit.  The forward crops are well formed already, however, and these are going to need reigning in.”

 

14 March 2014

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