Light leaf spot

[Mr Charisma]

Anyone had recommendations to spray there rape in the very near future ,,,,,,, I'm unable to walk my fields at the moment but I'm told that all the growth they went into winter with they will hit spring with and are starting to move .
I did read in the farming press somewhere that LLS is easily found and should be treated .

As an aside my dad has just come back from a couple of days holiday down near Reading and surrounding area ,,,,,, his comment was how poor the rape looked , big bare patches in most fields but couldn't really tell if it was pigeon or just poor establishment / slugs

 

[Gong Farmer]

I did read in the farming press somewhere that LLS is easily found and should be treated .

Which company wrote that article?

Haven't seen any crops myself that will need treating ahead of stem extension. Yes, crops may be moving now but wouldn't want to put a SE spray on in February.

 

[Mr Charisma]

Which company wrote that article?

Haven't seen any crops myself that will need treating ahead of stem extension. Yes, crops may be moving now but wouldn't want to put a SE spray on in February.

Have an inkling it was from a well known independent agronomist , will have to have a look ,,,, it's not as if I'm busy doing anything ,
So if you were walking a forward crop of rape and found LLS would you leave alone till SE

 

[Gong Farmer]

No I'd probably treat now (if widespread) but at least that's basing on your own crop and not on a press article

 

[Rob E]

Sad fact is, no fungicide 'cures' LLS, so I think far better to apply as a protective in higher risk situation. Stem ext too late in my experience as once it gets going it really does go. Some leafs in a bag in the airing cupboard for a couple days, at least you'll see if any are on the cusp of showing up in the field.
Knowing my area and LLS forecasts, I treat mine regardless. May be different in Suffolk for example though

 

[Ugo79]

Found some earlier this week.
Picto, 1 autumn fungicide in mid-November (Refinzar). Elgar on same farm appears to be clean.
I wasn't deliberately looking for LLS but crossed a few fields of rape on route to wheat fields. Found it quite easily, without having to incubate in plastic bag... long way off stem extension/green bud spray so feel my hand has been forced to spray.
Haven't seen it on any other situations/varieties this year... will be walking all rape crops next week to see what's happening.

 

[BenB]

Not finding much LLS yet in my area. The provisional Rothamsted LLS forecast was fairly low as I recall for the central south?
I have some samples in the airing cupboard so will see if they yield anything!

 

[Feldspar]

View attachment 475590 View attachment 475592

Found some earlier this week.
Picto, 1 autumn fungicide in mid-November (Refinzar). Elgar on same farm appears to be clean.
I wasn't deliberately looking for LLS but crossed a few fields of rape on route to wheat fields. Found it quite easily, without having to incubate in plastic bag... long way off stem extension/green bud spray so feel my hand has been forced to spray.
Haven't seen it on any other situations/varieties this year... will be walking all rape crops next week to see what's happening.

Had Picto and Elgar in the ground last year. Saw the same thing. Picto got it far worse than Elgar did. Not sure it hit the yield so much though (although very difficult to say because Picto got far more pigeon damage).

More generally though, I did a bit of research on this a few months ago and my conclusions were that the autumn fungicide has a greater effect than the spring application. May still add some fungicide in though depending on how the crop looks about a week when we go through with Galera.

 

[Rob E]

Central East was lower, that's probably an area for incubating. Rest of country looks high. Saying that, 24% of crops forecast to have UP TO 25% plants infected is still a lot.
I put some samples in airing cupboard couple weeks ago and found it, am waiting for weather window to spray now

http://www.rothamsted.ac.uk/light-leaf-spot-forecast/regional-light-leaf-spot-risk-forecast

 

[Rob E]

Had Picto and Elgar in the ground last year. Saw the same thing. Picto got it far worse than Elgar did. Not sure it hit the yield so much though (although very difficult to say because Picto got far more pigeon damage).

More generally though, I did a bit of research on this a few months ago and my conclusions were that the autumn fungicide has a greater effect than the spring application. May still add some fungicide in though depending on how the crop looks about a week when we go through with Galera.

Probably because the autumn treatment was before it took hold of crop so was more preventative. Spring treatment more risk management, and potentially applied after infection anyway when waiting until stem ext?
I just wish we had some high scores on varieties! For the price that hybrid seed is!

 

[franklin]

None here. Will apply splash of teb to keep it short, along with some nutrients. And if weather plays ball, some shield for a few thistles.

 

[Feldspar]

Probably because the autumn treatment was before it took hold of crop so was more preventative. Spring treatment more risk management, and potentially applied after infection anyway when waiting until stem ext?

Yup, pretty much. What surprised me though was that the autumn treatment had long-lasting effects -- way into late spring -- well after the fungicide had stopped acting.

 

[Rob E]

Yup, pretty much. What surprised me though was that the autumn treatment had long-lasting effects -- way into late spring -- well after the fungicide had stopped acting.

Interesting, I think a lot can be said for a well timed fungicide in the autumn...seeing as prevention/protection is so important. To me it's logical that a spring app then needs to also be early / preventative too

 

[Manny]

Walked all ours on Monday, couldn't find any LLS anywhere. Also decided not spraying the fox has saved a bit as the frost has done the job on the runch. Now just a bit of crawler to patch spray if the weather would allow. This wouldn't be a Rec by my old friend?