When will the csfb larvae pupate?

robbie

Member
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.
 

robbie

Member
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.
 

robbie

Member
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
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.
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.
 

robbie

Member
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.
 

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