Dietary RNA Interference as Behavioral Reproductive Isolation in Varroa Destructor

Overview

Varroa destructor, coloquially known as varroa mites, are a species of parasitic mites that are native to Asia. In the California central valley, these mites are an invasive species that can transmit serious illnesses to European honey bees, which are essential to pollination in the agricultural industry. The aim of the study was to determine whether gene silencing the V. destructor chemosensory protein Vd40090 would significantly alter the ability of V. destructor to detect European honeybee kairomones necessary for the V. destructor reproductive process. An experiment was conducted in which mites were divided into a test and control group and placed in separate environments from each other. The control group of mites received an artificial diet including Hank’s buffer, fruit fly nutrition supplement, and bovine serum supplements, while the test group of mites received a similar diet including those ingredients as well as siRNA designed to target a sequence of the Vd40090 gene. The mites were then moved to a different sterile environment, still divided into their groups. Both groups were then presented with a piece of fabric which had been exposed to honeybee worker kairomones. Afterwards, the number of mites that successfully detected the kairomones were recorded in comparison to the number of total mites in their environment. After 12 hours, 75% of the test mites were able to detect the kairomones, and after 24 hours, only 25% of the test mites were able to detect the kairomones. The overall experiment had a chi-scare test of association value of 3.833, significantly disproving the null hypothesis. These results mean that dietary RNA interference is a successful way to disrupt the chemosensory function of varroa mites through preventing the translation of olfactory proteins. The development of this study shows that with further research, dietary RNA interference of chemosensory genes is a strong contender to become a new way of preventing the spread of V. destructor in North America and alleviating the damage they do to local ecosystems and to the local agricultural economy.

Competition history

• CSEF 2026 Zoology (Senior Division) · Entry S-20-06

Related projects

Closest projects by meaning, across every fair and year in the corpus.

Browse more like this

• All Animal Sciences projects
• CSEF Animal Sciences projects
• Every CSEF 2026 project