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Life cycle of walnut husk fly

Composite of seven images in a circle illustrating the life cycle of walnut husk fly. At the bottom center is an image of small oval-shaped pupae in soil. An arrow with the word “overwintering” leads clockwise to an adult fly with dark bands on its wings and yellow spot on its back. An arrow labeled “8 or more days” continues clockwise to two flies labeled “mating." From there, an arrow labeled “within a week” leads to “egg laying” with a photo of a fly inserting its pointed abdomen into a fruit. Next, an arrow labeled “4-7 days” continues clockwise to an image labeled “eggs hatch” showing a hole in the surface of fruit with a small, oblong larvae. An arrow then leads to an image of fruit labeled “maggots feed” showing faint oblong larvae on fruit. From there, an arrow labeled “3–5 weeks” leads to a final image labeled “maggots drop” showing an elongated yellowish larva on the surface of fruit. An arrow leads back to the first pupae image. In the center of the life cycle are the words “Spray during this period” with an arrow pointing to the time between mating and egg laying, which is labeled “within a week.” Credit: Michael L. Poe
Credit: Michael L. Poe
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