Raspberry beetle

[swampie sue]

Hi

My Autumn raspberries are covered in green raspberries this year, however the ones that have ripened are of poor quality ( little black bits over them ) and sometimes contain a little grub. I wondered if this a raspberry beetle. I sprayed them with Derris but still they remain. I just wondered is there anything else I can do to save the rest of the crop or could the failure of the Derris to work be due the fact it keeps raining all the time and it might have rained too soon after I sprayed.

[daylily]

Sounds like them, I don't think there is much you can do to this year's crop. Apply the treatment next season just after flowering, as the first berries start to ripen.

[swampie sue]

Hi Daylily,

Most of the raspberries are still, tiny and green, and their are still flowers coming, is it really too late to save them this year.

[Madasafish]

Not too late: Derris on green fruit only.. not flowers as it will kill the bees.

[daylily]

As far as I know, the rb beetle lays in June/July, so rather unlikely, though might happen - miracles of nature -, that this is still ongoing, larvae hatches and within a couple of weeks or so it's in the fruit, from then on, treatment is useless.

Trying won't hurt, but I wouldn't have high hopes.

Turn the soil well over around them for the winter to expose some grubs which over winter near the plants and start business again next spring.

[swampie sue]

Thanks, will see what happens. Just off to have a look at some newly ripened ones in a mo.

I really don't have a lot of luck with this fruit growing lark... Sawfly on my gooseberries, beetles on my raspberries, sooty blotch on my apples, blight on my tomato's, rusty leaves on my rhubarb. Green fingers, Not me......