Diamondback moth Plutella xylostella (Linnaeus) is a serious pest of cole crops in Hawaii. Currently, developmental and commercially available insecticides are being tested against diamondback moth field populations. A field trial was conducted on Kula, Maui using the following insecticides: Chlorantraniliprole, Emamectin benzoate, Flubendiamide, Indoxacarb, Metaflumizone and Pyridalyl. The insecticides were applied upon “Tastie” head cabbage. Results after two treatments showed that Chlorantraniliprole proved to be the most effective while Emamectin benzoate proved to be the least effective. After four treatments, Chlorantraniliprole, Pyridalyl and Flumendiamide reduced diamondback moth density, however showed no significant difference from Emamectin benzoate. The following insecticides, Chlorantraniliprole, Flubendiamide, Indoxacarb, Metaflumizone and Pyridalyl were tested against a lab colony from Kamuela, Hawaii. This lab colony is susceptible due to the fact that it has not been exposed to any new insecticides. Because of this, we could then see how it reacts to the chemicals we are testing, thus establishing a LC-50 as our standard baseline. With the following data, we can then see the difference in mortality rates from the field colony (Kula) and the lab colony (Kamuela.)