EAMU for Cuprokylt provides timely control against fruit tree canker

Apple and pear growers have been advised to take advantage of the three-month emergency authorisation for Certis' fungicide Cuprokylt for use against Nectria canker.

Image: HW
Image: HW

The 120-day EAMU (Extension of Authorisation for Minor Use) was secured by AHDB Horticulture last month and lasts until 14 July.

"Cuprokylt is a very important product that protects new infection entry points at key times in the season," according to Hutchinson’s horticultural agronomist Rob Saunders.

"The climate in the UK means that our orchards experience high canker infection pressure, and the newer varieties like Gala and Kanzi have little resistance to the disease," he said.

"Nectria canker can be particularly damaging in young orchards, as when a canker lesion is present in the central stem, it results in the loss of the tree. Some young orchards have suffered losses of up to 10% of the trees per year."

Canker infections can become established firstly in early spring during bud break where bud scales fall, leaving a scar, and more significantly during autumn, when falling leaves result in thousands of leaf scars. Being so numerous, these two routes exceed both fruit picking scars and pruning wounds in importance.

"Being able to apply Cuprokylt on these entry points is really important for reducing the possibility of a new canker infection taking hold," Saunders said.

Cuprokylt is a protectant fungicide containing 50% w/w copper oxychloride in a wettable powder formulation. A 50m aquatic buffer zone which must be strictly adhered to when applying.

It has also been granted a 120-day emergency authorisation from 15 May for control of blight in potatoes.


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