Whiteflies and worm castings

[duajones]

Read recently that mulching with worm castings has shown to repel whitflies and wondered if anyone here has experience with it. Here is a little what I read:

An exciting development in a new form of whitefly control may be coming to light. Studies conducted over a six-year period show that plants mulched with worm castings repel a variety of pests, including whiteflies. Apparently the worm castings raise the level of a particular enzyme in the plants-the enzyme chitinase-which whiteflies find distasteful enough to keep moving. The recommendation is to spread a one-inch layer of worm castings around the plant and periodically apply more. It takes some time for the enzyme to form.
In an article published in May 2000, Los Angeles Times reporter Julie Bawden Davis noticed a significant drop in whitefly populations one month after mulching a whitefly-infested hibiscus. After seven weeks, she said, there were absolutely no whiteflies on the plant