Steinernema glaseri is a famous entomopathogenic nematode (EPN) of the family Steinernematidae that parasitizes and kills subterranean insect grubs, famously applied against the Japanese beetle (Popillia japonica) with symbiotic bacteria Xenorhabdus.

• parasitic nematode: Exact biological classification of Steinernema glaseri.
• parasitic insect: Includes wasps like Tiphia vernalis.
• parasitic bacteria: Milky spore disease is caused by Paenibacillus popilliae.
• parasitic fungi: Includes Metarhizium and Beauveria.

In community ecology and predator-prey dynamics, when the presence of one natural enemy interferes with, interferes intraspecifically, or directly diminishes the hunting efficiency and predation rate of a second predator species, it is designated an Antagonistic interaction (or predator interference / intraguild predation).

• Additive interactions: Total predation equals the simple sum of individual predator species effects.
• Antagonistic interactions: Combined predation rate is significantly less than expected because predators disrupt or attack one another.
• Synergistic interactions: Combined predation exceeds the sum of individual species rates due to complementary hunting.
• None of the above: Incorrect.

Semiochemicals (including insect sex pheromones, aggregation pheromones, and kairomones) are deployed in integrated pest management across three primary strategies: monitoring population densities and initial flights (biomonitoring), direct removal through high-density lure traps (mass trapping), and saturating the atmosphere to prevent mate finding (mating disruption).

• Biomonitoring: Detecting early pest arrivals and determining economic threshold levels.
• Mass trapping: Deploying dense traps to physically remove significant portions of insect populations.
• Mating disruption: Broadcasting pheromone ropes or microcapsules to prevent males from locating females.
• All of the above: All three constitute major applied uses of semiochemicals in IPM.