Experiments on immature stages of Nisotra gemella (Erichson) A plantation of mesona (Mesona chinensis, ไป่), with yellow sticky insect traps for monitoring populations of N. gemella B feeding marks made by adults of N. gemella C young sprouts of mesona placed in plastic cups (Pint-sized BugDorm) as well as adults of N. gemella, in dorsolateral view D ditto, in lateral view E a special design for observing immature stages of N. gemella with plastic petri dishes closed F ditto, but plastic petri dishes opened.