Reply To: Which Bacillus Thuringiensis For Fruit And Veg?

[Sausage]

Different strains of Bt target different types of insect. Kurstaki and aizawai both affect lepidoptera including cabbage whites but also other types of butterflies and moths. That plus evidence of resistance building up when over-used is possibly why it still isn’t licensed for home gardeners in the UK.

It’s available from several sellers on Ebay and Amazon under different brand names. There might be a couple more sources mentioned by other members if you use the Forum search.