The following is a letter I received from a reader regarding army worms.....
Armyworm Predators were Killed
Army worms invaded my yard almost a year ago. The winter here (Dallas, TX) was not cold enough to kill them.
These are Army Worm. They are active around Christmas in most areas around Australia. For some reason when they attack a lawn, they don't just attack a section, they tend to spread very quickly through the whole lawn.
These are aphids, army worms, cabbage worms and loopers and slugs. These pests can be controlled with organic methods: ladybugs will eat aphids, the worms (actually caterpillars) can be treated with Bt and slugs can be trapped.
Plant dill, parsley and yarrow to attract the braconid wasp that kills corn borers, army worms, cabbage worms, codling moths and horn worms.
 See also: Caterpillars, Wings, Insect, Caterpillar, Gardening
  
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