White Stains on Vinyl Siding (Pesticide?)

[Roaddogtx]

Not to sure if you have seen this, but is from a conversation from last year. Not the same stain but maybe helpful

Pesticide spray taking off oxidation?

Permethrin insecticide Permethrin (“per-meth-rin”), on the other hand, is a synthetic, man-made insecticide, whose chemical structure is based on natural pyrethrum. The so-called pyrethroid insecticides were developed to match or exceed the effectiveness of natural pyrethrum but be more stable in sunlight. Pyrethroid insecticides are used in agriculture because of their stability in sunlight. This is the product he used.