FAQs June 2016

This year has been particularly conducive to chocolate spot with cool, wet conditions. If the crop has flowered then there will be little effect on yield and probably no need for a further fungicide. If still flowering would suggest a further fungicide, i.e., ALTO ELITE (if the maximum dose rate has not been reached already). Trials have also shown that AMISTAR @ 0.5-0.7 l/ha would give good control of chocolate spot.

OLYMPUS has an EAMU for the control of alternaria in potatoes (see www.pesticides.gov.uk for the EAMU).

The maximum total dose for the use of HALLMARK ZEON on brassicas is 200 mls/ha, therefore the grower can either use 2 x 50 mls/ha or 1 x 100 mls/ha HALLMARK ZEON.

If NEMATHORIN has been used, then the potatoes must stay in the ground until 119 days (17 weeks) has passed. No desiccation or green top lifting should occur until after 119 days.

The EU MRL was reduced with immediate effect, therefore Syngenta have removed laid barley from the label. CRD have not revoked the crops from the label yet, therefore if growers have old labelled product, they are still entitled to use it, but Syngenta would advise against it due to increased risk of MRL exceedence.

Yes, if the SMART test fails, then a maximum of 1.0 l/ha REGLONE can be applied.  Remember the maximum total dose of REGLONE in potatoes is 5.0 l/ha.

CUBANITA is still available.  It was decided to take it off the RL because sales were below 2%.

Spring barley varieties are not usually prone to net blotch and has not been seen in many years.

AHDB give this rating based on the previous 5 years trials results.  This is subject to change early next year.