When will the csfb larvae pupate?
- Thread starter Flat 10
- Start date
crop looks dire here. fantastic in autumn its now brown and stuffed with larvae. never seen so many, really cant see it performing. To think some get 6.7t/ha ?
So does mine. I would be chuffed get half of that number at the moment
End of spring....
Could be anytime!
- Location
- S.E
Loads of larvae here. Loss of neonics and now metaldahyde mean I am going to admit defeat and give them what they want which is to stop growing osr.
- Location
- the brecks norfolk
I haven't got masses of larvae but you can find some but what i have noticed is that a lot of the smaller ones have died and only the odd big one is still alive, I assume it's the frosts that have done the business.
As for the look of my rape it's gone brown and yukky looking but it's now moving on with new growth.
As for the look of my rape it's gone brown and yukky looking but it's now moving on with new growth.
- Location
- the brecks norfolk
Is it normal to see flee beetle adults at this time of year???
While on my hands and knees today looking at larvae damage I saw a beetle jump from the plant I touched, when I looked closer and moved other plants I saw his friends jumping about.
While on my hands and knees today looking at larvae damage I saw a beetle jump from the plant I touched, when I looked closer and moved other plants I saw his friends jumping about.
- Location
- S E Glos
Where pests are concerned, there are no rules anymore.
yellow belly
Member
- Location
- south west lincolnshire
when tray testing my fert spreader a csfb jumped in the tray
It is possible for the plant to branch out but it depends on how much damage the larvae have done to it.
I saw one today
yellow belly
Member
- Location
- south west lincolnshire
if they all come out now and then we get a cold mid march will they die out without procreating
- Location
- the brecks norfolk
I've got some plants that have had the growing point/green buds chewed and have gone brown. I assumed it must be csfb but when I've dissected the plant there's no damage in the the main stem so how have they got to the growing point? do They travel up on the outside of the plant. All the larvae I've found on the lower older leaves are still a 1/4 inch from the main stem.
Hindsight
Member
- Location
- Lincolnshire
If I recall correctly from listening to an ADAS entomologist decades ago larvae can exit a leaf petiole and migrate around a plant on the outside of the plant then burrow in again.
- Location
- the brecks norfolk
Interesting, I couldn't work out how they got to the top of the plant then there was no damage to the inside of a dissected plant.
Do you know what the criteria is for them to be able to exit and get to the growing point, it could be a real problem.
Do you know what the criteria is for them to be able to exit and get to the growing point, it could be a real problem.
- Location
- Bedfordshire
I think your right on that one
- Location
- Cirencester
Ploughed all mine in, know of a chap who reputedly has written off 1600ac of OSR, wont be growing it here any more.
- Tags
- oilseed rape