Stylops bipunctatus

Stylops bipunctatus is a species of insect belonging to the order Strepsiptera and the family Stylopidae. It is a highly specialized endoparasite that primarily targets solitary bees of the genus Andrena, representing a unique evolutionary branch of parasitic insects.

From an agronomic perspective, this insect is considered a pest not due to direct crop damage, but because it negatively impacts the population of native wild bee pollinators. By parasitizing bees, it reduces their efficiency and foraging activity, which in turn leads to poor pollination rates in flowering crops.

The life cycle is distinct, involving a larval stage known as a triungulin. These larvae wait on the petals of flowers to attach themselves to a passing host bee. Once attached, they burrow into the bee's body, where they undergo development, effectively consuming the host's resources and sterilizing it.

The economic harm caused by Stylops bipunctatus is indirect but significant. Reduced pollination results in lower fruit set, decreased seed quality, and ultimately reduced yields for horticultural and oilseed crops that rely heavily on wild pollinators rather than managed honey bees.

Protection measures should focus on integrated pest management (IPM) strategies that prioritize pollinator safety. Key actions include minimizing the use of broad-spectrum chemical insecticides, particularly during bloom, and protecting natural nesting sites for wild bees in buffer zones to ensure robust pollination services across the farm.