Walnut husk fly can be a problem in orchards where nuts are grown to be sold in-shell. With green eyes, a prominent yellow spot and banded wings, the walnut husk fly is easy to spot, but the damage it causes can be difficult to repair.
The first indication that walnut husky fly is present comes through the development of a small sting-like mark on the husk that is left when eggs are deposited in the husk. As the larvae feed within the husk, these marks grow into soft, dark splotches. Damage occurs through staining of the nutshell and by the affected husks sticking to the shell.
While walnut husk fly adults can be seen as early as May 1, they are most apparent from mid-July through mid-to-late August,
In an independent study, two foliar applications of Belay® Insecticide at the 6-oz rate three weeks apart in August have been shown to significantly reduce the number of walnut husk fly stings.
Belay is a long-lasting, fast-acting insecticide for hard-to-control pests in tree nut crops.
To learn more about Belay and the rest of Valent’s portfolio of tree nut products, visit www.valent.com/agriculture/crops/treenuts/index.cfm.