Raspberry sawfly, Monophadnoides geniculatus, has been identified as an uncommon pest affecting raspberries on the Central Coast of California, according to a March 15 announcement. The information was originally published in 2008 but remains relevant for growers and agricultural professionals.
The topic is important because proper identification of raspberry sawfly larvae can prevent unnecessary pesticide use and protect crop yields. While the larvae may cause visible damage to leaves, severe infestations have not yet been reported in the region.
Raspberry sawflies are actually wasps rather than flies. Their larvae are typically found on the undersides of raspberry leaves, measuring about half an inch long with a light green color and a brown stripe down the back. These larvae often appear in groups, creating clusters of punctures and holes in leaves that signal their presence. Adult wasps are less commonly seen; they have a thick body about a quarter inch long and females display a yellow-white band across their abdomen.
In most cases, control measures are not necessary since light to moderate infestations do not compromise fruit yield. However, more severe outbreaks could potentially defoliate plants and cause significant damage. The article emphasizes that it is crucial for growers not to confuse raspberry sawfly larvae with more damaging moth larvae because different chemicals may be required for control.
University of California Agriculture and Natural Resources (UC ANR) supports its programs through public contributions according to the official website. UC ANR promotes sustainable practices aimed at strengthening resilient ecosystems and economic vitality according to the official website. The organization operates nine research and extension centers representing California’s diverse ecosystems according to the official website.
UC ANR is recognized for linking research with community needs according to the official website and manages Cooperative Extension services as part of the University of California system according to the official website. Each year, UC ANR conducts over 33,800 educational events and engages more than 18,400 volunteers in its initiatives according to the official website. The organization extends university research statewide through educational programs operating in all 58 counties, delivering science-based information via workshops and partnerships while mobilizing volunteers and research centers to address state issues according to the official website.
As new questions arise regarding pests like raspberry sawfly, ongoing outreach by organizations such as UC ANR helps ensure that growers receive up-to-date guidance tailored for local conditions.
