Biological control?

It’s nice to see that caterpillars sometimes eat the weeds too. This mallow burr is a major weed here, and comes up on any disturbed ground. It gets up to 2 m high and has burrs that stick firmly to any fabric. Fortunately it’s relatively easy to pull, when young, but I was delighted to see some caterpillars helping me with the job. This caterpillar is in my old school colours, too! Green, black and gold, and even the red head fits with the later addition of the red house. Biological control…

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