A typical oviposition required 45 minutes to complete. Larvae develop in the ovules during July and August consuming the contents of the seeds and killing them. They reach full size by late September and then enter diapause. By late May the larvae transform to pupae. But, we believe this process will be slow, perhaps in 20 or more years.
Recent research shows good potential for management of the seed chalcid.
The plants first bloomed in 1989 and produced abundant seed in 1990 and 1991. Overall, each hip had an average of 6.9 developed seeds. The rose stem girdler. All tissue distal to the girdle was killed including developing rose hips and seeds. They find new shoots in May and June and oviposit just under the bark.