Steven from Boynton Beach Fl. writes,
Will merit be a good defense against white fly and how long will an application last on ficus hedges?
Merit WSP and Merit WP are good choices for white fly on ficus. You can expect an application to last 3-6 months but depending on the size of the ficus it may take 1-2 months to see the begininng result as the product must translocate through the ficus. While you are waiting for it to work you can do foliage sprays with Talstar P for immediate results. Merit Granules (the product you referenced in your question) is not labeled to deal with whitefly on ficus because its usage rate is much different.
Answer last updated on: 01/30/2013