By Daftdel
Kent,
United Kingdom 
Hi all, My lupins had a serious case of aphid infestation earlier in the summer, and now although still alive, they are looking very sad. I sprayed them at the time but now they are growing very tiny leaves and no flowers. Should I dig them out and dicard, or will they recover. Any ideas would be gratefully received. Thanks
14 Jul, 2013
Answers
I'd be tempted to cut most of the foliage off and then give it a good feed and plenty of water. They will recover. Some of mine got hit badly 6 yrs ago and they were fine for 3 more years before they died. they are relatively short lived plants.
14 Jul, 2013
Are the aphids still alive and eating your lupins ?
What did you spray on them ?
I am not sure, but they may also need a light fertilizer to help them recover.
Imidaclporid is a great systemic insecticide to control those aphids but will hurt honey bees too.
You can use it as a soil drench or spray it...
Thanks
Eklogite
14 Jul, 2013