The walnut husk fly is a mid- to late season pest. It occurs in all walnut-growing areas in California. Black walnut and all cultivars of English walnut are suitable hosts for the husk fly.

by Helmut Riedl, originally published 1993. The walnut husk fly originated east of the Rocky Mountains. It was first reported in California in 1926 and by the 1950s had spread to the Pacific Northwest. It has become a serious mid- to late season pest of walnuts in the West.

Aug 6, 2019 · The walnut husk fly (WHF) looks so striking that it is easy to identify. It is the size of a housefly but brown with a yellow semicircle on its back. And then there are its unique translucent wings – with large brownish-black bands on them.

Rhagoletis juglandis, also known as the walnut husk fly, is a species of tephritid or fruit fly in the family Tephritidae. It is closely related to the walnut husk maggot Rhagoletis suavis (Loew, 1862).

Jun 30, 2017 · According to the walnut husk fly model, protection of walnuts (plus apricots and peaches near walnut plantings) should begin at these times: Most areas of Wasatch Front: July 3 – 5; Cooler areas (Benches, Cache, Carbon, etc.): July 8 – 17; This is typically a pest of walnuts, but can attack soft apricots or peaches growing near walnuts.

Walnut husk fly (Order Diptera, Family Tephritidae; Fig. 1) is the most common insect pest of walnuts in Utah. Husk fly larvae (maggots) tunnel in walnut husks, causing them to soften and decay, and stain the shell (Fig. 2). Damaged husks are difficult to remove.

Sep 22, 2016 · Walnut husk flies produce one generation per year overwintering as pupae in the soil. They emerge as adults in the Sacramento Valley from early June through September, with peak emergence in July in recent years. About one percent of …