I've read the same opinion...and others that say bull... and back and fourth over and over and over. But its an approved fungicide and used by so many. I have yet to find any testimonial of someone saying they actually got sick or seeing evidence at all that it does not completely leave the plant at the end of the cycle... hearing just opinions from someone who knows someone who says. It works is what I know by breaking down fungal cell membranes. As far as effecting DNA..I think youre thinking of a different class of fungicide Benzimidazoles which is not what Eagle20 is.
The fungicide group, demethylation inhibitors (DMI), which contain the triazole fungicides, was introduced in the mid-1970s. Triazoles consist of numerous members, of which several are labeled or are in the process of being labeled for use on field crops in Iowa--cyproconazole, flusilazole, flutriafol, metconazole, myclobutanil (eagle20), propiconazole, prothioconazole, tebuconazole, and tetraconazole.
Triazoles are used on many different types of plants in Iowa including field crops, fruit trees, small fruit, vegetables, and turf. These fungicides are highly effective against many different fungal diseases, especially powdery mildews, rusts, and many leaf-spotting fungi.
I've been over probably 100 pages reading over and over and I think as long as its handled carefully, taking precaution not to expose my skin, eyes, mouth, and nose.. after a couple Veg applications I shouldn't need to use it again and the residue should be completely out of the plant after a 60-70 day bloom. At that point I'll have been using another regimine like the more natural Zero Tolerance fungicide as a precautionary measure.
Now that is what I call toxic. Hahahaa.