The Emperor gum moth can not feed so it will not be harmful if it's mouth parts are to weak to even consume food!
they are very harmful.
The emperor moth caterpillar eats from plants while in the caterpillar stage. When it turns into the moth it will feed off of Heather and blackthorn.
If you need help I recommend you type in the specific question you need help with
luna moth's are not helpful
it can be helpful or harmful
sometimes they are helpful and harmful.
Atlas moths are very helpful, they play an important role in commerce. Atlas moths are used for the brown strands of silk they excrete and in places like Taiwan, their cocoons are used to make purses.
Sandpaper is both helpful and harmful.
It can be, for example, Emperor Butterfly or Emperor Moth.
they are helpful not harmful to plants
the male ruler of an empire, red table grape of California emperor, emperor moth, Saturnia pavonia (large moth of temperate forests of Eurasia having heavily scaled transparent wings) or emperor butterfly, (large richly colored butterfly) . ~XDDXDD~
Male emperor moths are equipped with large, feathery antennae which have great quantities of olfactory receptors on them. The antennae are spread out to come in contact with as many scent molecules as possible allowing them to detect females from great distances.