FG BUY&SELL        FARMERS WEATHER       ARABLE FARMING        DAIRY FARMER      FARMERS GUARDIAN        AGRIMONEY        OUR EVENTS        MEMBERSHIP BENEFITS        BLOGS        MORE FROM US

You are viewing 1 of your 2 free articles

You’ll need to join us by becoming a member to gain more access.
Already a Member?

Login Join us now

Talking agronomy with Sarah Symes: waiting for the right conditions

Insights

We have been holding off doing any Kerb (propyzamide) or Astrokerb (aminopyralid + propyzamide) recommendations in oilseed rape, as these products require soil temperatures to be below 8degC to avoid the active ingredient degrading too quickly in warm soils.

 

Twitter Facebook

We have been holding off doing any Kerb (propyzamide) or Astrokerb (aminopyralid + propyzamide) recommendations in oilseed rape, as these products require soil temperatures to be below 8degC to avoid the active ingredient degrading too quickly in warm soils.

 

Phoma infestations have been variable; where disease has reached threshold an application of Plover (difenoconazole) has been applied, with the view of coming back in in November with Proline (prothioconazole) to see us through the winter with light leaf spot protected against as well.

 

Mild temperatures and predicted rainfall for the end of October will see phoma levels increase. The early infection of phoma must have come in to the crop during wet weather at the beginning of September as only those crops established at this time were showing phoma above the 10% of plants infected threshold during October, and then only on the first true leaf.

Phoma incidence

Phoma infestations have been variable; where disease has reached threshold an application of Plover (difenoconazole) has been applied, with the view of coming back in in November with Proline (prothioconazole) to see us through the winter with light leaf spot protected against as well.

 

Mild temperatures and predicted rainfall for the end of October will see phoma levels increase. The early infection of phoma must have come in to the crop during wet weather at the beginning of September as only those crops established at this time were showing phoma above the 10% of plants infected threshold during October, and then only on the first true leaf.

 

Pests

Pests

Some small, late-sown crops are still struggling with the effects of flea beetle damage earlier on in the autumn, which has delayed applications of Centurion Max (clethodim) to black-grass-infested areas. It is now too late to apply Centurion Max as late applications are more likely to cause crop damage, so we will switch to Kerb or Crawler (carbetamide) instead.

 

Peach potato aphid (Myzus persicae) numbers have remained extremely low in the South, although we know that is not the case in other areas, and as a result we have not treated any oilseed rape crops to prevent aphids from spreading turnip yellows virus.

 

Pesticide treatments

All of our winter cereal area has been planted, with only late-sown wheat after maize waiting to be drilled. Growers with bad black-grass situations held off as long as they dare to get a chit and spray off to start with a good clean seedbed.

 

Wheat or barley crops in bad black-grass situations have had a highly stacked autumn residual programme, with Crystal + Hurricane (flufenacet + pendimethalin + DFF) to start, followed up with a Liberator (flufenacet + DFF) + Defy (prosulfocarb) at the 2-3 leaf stage. This will hopefully put us in a good position going into the spring.

 

The later drilling has reduced the number of grass-weeds emerging and where crops have received some rain after the first residual treatments were applied we are seeing signs of good herbicide uptake on those black-grass plants which have emerged.

 

Despite aphid numbers being low, we will assess the need to treat early-sown cereals with an insecticide for BYDV about mid-November.

 

All our cereal crops are Deter (clothianidin)-dressed as we are usually in a high BYDV risk area and this will give six-eight weeks aphid protection, but if the autumn stays mild or aphid numbers rise, early drilled crops could require treatment, but only, if aphids are found in the crop.

 

The lack of rain at the start of October has seen the slug pressure ease, with only spot treating required in many places.

 

Crops which have been direct drilled with straw mulch left on the surface have had the biggest issues with slugs, and have had to treat twice or sometimes three times to keep control of them. So far we haven’t seen too many other issues, but will be keeping a close eye on things in the coming weeks.

 

Winter beans have been sown and residual pre-emergence recommendations made.

Twitter Facebook
Rating (0 vote/s)
Post a Comment
To see comments and join in the conversation please log in.

More Insights

Fresh approach gives boost to maize yields

An increase in cow numbers and the desire to have sufficient maize to ensure year round feeding meant the Roberts family had to fundamentally review their approach to growing the crop. Jeremy Hunt reports.

Grazing winter cereals with livestock

A technique widely used in Australia and the US could help boost black-grass control. Chloe Palmer finds out more.

Stewardship scheme boosts cirl bunting population

Targeted arable management by farmers in the South West has helped a small farmland bird come back from the cusp of vanishing from Britain. Melanie Jenkins finds out more.

An inspiration to agriculture

The new Master of the Worshipful Company of Farmers had never been on a farm until the age of 23. Alan Stennett reports.

Lamma Preview 2017: The need to know on drones

If a drone is on your 2017 shopping list, then a visit to Lamma could help with your research. Geoff Ashcroft reports.
FG Insight and FGInsight.com are trademarks of Briefing Media Ltd.
Farmers Guardian and FarmersGuardian.com are trademarks of Farmers Guardian Ltd, a subsidiary of Briefing Media Ltd.
All material published on FGInsight.com and FarmersGuardian.com is copyrighted © 2016 by Briefing Media Limited. All rights reserved.
RSS news feeds