posted 9 years ago
I've read in several places that some Bt is made with GMO bacteria, the organically certified stuff is, in theory, not.
It's up to you if you want to use it or not. I personally feel it's a waste of money as it only treats the symptom. Use Bt this year, the problem will be back (probably stronger) next year. And the year after, and the year after. I don't like spending money on something year in and year out that offers only temporary relief. I don't see spending money every year, then putting in the labour to apply it as a permanent solution. But that's just me. I would much rather set up an environment where nature does the work for me. The aphid infestation on our plum trees last year attracted woodpeckers and other birds who, this year, cleaned the tree of aphids, ants, then moved on to the caterpillars on the other fruit trees, now they are eating the aphids on my cabbages. If I spray the trees or cabbages with any sort of pest killer, be it natural or not, then I wouldn't have the birds and lizards doing the work for me. I would have to keep spraying.
I'm lazy and miserly. This is why I can't see much benefit to using pesticides. Other people like to use Bt. It's your choice which way you want to go.
By the way, when you say Whey protein, do you mean powdered stuff from the grocery store or live culture whey from making cheese? On further reading, it looks like it's the live cultures that are doing the most benefit for the plants, as much as the calcium. I'm curious if whey protein from the store would have the same effect. The only sure fire way to know if it would work in your garden is to try it. If you do, please let us know how it goes.