Complete info about it can be read here. Herein, are katydids good or bad?
Too bad. These insects are slow moving and very interesting to examine. They are not aggressive and tolerate a bit of prodding so are a good insect to introduce to children. Although they can't be classified as “beneficial insects” they do most of us no harm and are enjoyable when we are lucky enough to come upon them.
Secondly, are katydids destructive? Broadwinged Katydids are much less destructive than their grasshopper relatives. They also help control small insects by eating them. The best defense is a strong offense when it comes to protecting your vegetable garden against damaging insect pests.
Simply so, are katydids harmful to gardens?
Katydids look like grasshoppers but you can tell them apart by their antennas, which are as long as their bright green bodies. You'll normally find these insects in shrubs or trees in the garden, since they are leaf eaters. Generally, katydids in the garden nibble leaves but do not do serious garden damage.
How do you get rid of katydids?
Try solutions of garlic oil, neem oil or Tabasco mixed with water and spray the plants. While the garlic and Tabasco will repel the katydids, neem oil acts not only as a repellent, but also as an anti-feed and growth regulator, and even sterilizes some species.
