In a fast move to save the lettuce seedlings being savagely eaten in an outbreak of both aphids and Cabbage White Looper caterpillars migrating from the neighboring chard and kale, an emergency evacuation took place. Thanking the plants for their extremely productive service, all kale and chard was removed, salvaging what little was decently usable as food, but discarding most directly into the waste debris containers. This is what we get for “slacking off” in observation given our really busy schedules last week, while there was a burgeoning plague. I had noticed a few tell-tale signs of building aphid populations on the kale, as well as white flies, but nothing had seemed in imminent danger. Then the Swiss chard seemed to become inundated with aphids almost overnight. Evidently, behind that were lurking newly hatched Cabbage loopers, always unseen until they wreak havoc, stripping plants to their ribs in only 1 or 2 nights. Even with eradicating the plant host-sources, and spraying Thuricide* on the lettuce, we could still lose the whole row, but hopefully not. We’ll know in a day or two.
It was also good incentive to tidy up other areas in the garden looking a bit more distressed, removing the cucumbers and ‘delicata’ squash plants, and trimming back the sprawling cherry tomatoes.
"Looking good" yet hunry pests lurk in the chard and kale. So, now you see us.....
.........Now you don't! And the lettuce seedlings are much happier.
*Thuricide is a liquid comprised of millions of spores of the bacterium Bacillis thuringiensis, which reproduce inside the gut of specific types of caterpillars, becoming fatally toxic in a very short time. This is a naturally occurring bacterium that evolved into its specific function.
High Vibe Bounty 
Fast thinking and acting. Good for you. Those little buggies do sneak in unexpectedly.