Podisus

Herrich-Schaeffer, 1851

spined soldier bugs, predatory stink bugs

Species Guides

Podisus brevispinus
Podisus maculiventris(Spined Soldier Bug)
Podisus neglectus
Podisus placidus
Podisus sagitta
Podisus serieventris

Podisus is a of predatory stink bugs in the Pentatomidae containing approximately 17-20 described . The genus is best known for the spined soldier bug (Podisus maculiventris), a native North American widely used in programs. Species in this genus are predators that feed on diverse prey, with documented on over 70 insect species including major agricultural pests. They possess distinctive spiny projections on the shoulders and have been extensively studied for their potential in .

Podisus by (c) Cecil Smith, some rights reserved (CC BY), uploaded by Cecil Smith. Used under a CC-BY license.

Podisus maculiventris by (c) Russ Ottens, University of Georgia, Bugwood.org, some rights reserved (CC BY). Used under a CC-BY license.

Podisus maculiventris by (c) Bill Keim, some rights reserved (CC BY). Used under a CC-BY license.

Pronunciation

How to pronounce Podisus: /poˈdiː.sus/

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

within Podisus can be distinguished from other predatory stink bugs by the presence of prominent spines on the humeral angles (shoulders) of the pronotum. The most commonly encountered species, Podisus maculiventris, shows a distinctive spined shoulder profile. Species-level identification often requires microscopic examination of genitalic characters, as external can be similar among . Podisus species differ from plant-feeding stink bugs in the same by their more slender body form and predatory mouthpart structure.

Images

Distribution

occurs in North America, Europe (Denmark, Norway, Sweden), and has been introduced to various regions for purposes. Podisus maculiventris is native to North America and has been documented from the United States including Vermont.

Diet

feeding on diverse prey. Podisus maculiventris has been documented preying on more than 70 insect including larvae of Coleoptera and Lepidoptera, with particular effectiveness against soft-bodied larvae. Prey includes Colorado potato beetle, brown marmorated stink bug ( and early instars), and various caterpillar pests. Shows feeding preference for large, smooth-bodied larvae over small or hairy prey.

Life Cycle

Development includes stage and five nymphal instars before reaching adulthood. Females lay eggs in clusters on vegetation, with egg coloration (dark or light) determined by light conditions at the oviposition site—darker eggs laid on sun-exposed upper leaf surfaces, lighter eggs on shaded undersides. Fifth instar nymphs exhibit highest daily prey consumption. are long-lived and continue throughout favorable conditions.

Behavior

Predatory involves active hunting and ambush tactics. Attacks prey by piercing with from the side, injecting digestive , and lifting prey off substrate while feeding—this lifting behavior limits success against larger prey. Can detect plant volatile compounds released by herbivore-damaged plants, using these chemical cues to locate prey patches. overwinter and become active on warm winter days when temperatures permit.

Ecological Role

Important agent in agricultural and forest . Functions as a that helps suppress of herbivorous pest insects. Used in programs against coleopteran and lepidopteran pests. Serves as a natural enemy that can be integrated with selective applications in programs, though compatibility varies by compound.

Human Relevance

Widely used in programs for management of agricultural pests. Podisus maculiventris is commercially available for augmentative release in organic and conventional cropping systems. Research has explored its use against brown marmorated stink bug, Colorado potato beetle, and various caterpillar pests in crops including soybean, corn, crucifers, and potatoes. Effectiveness limited against larger prey stages due to physical constraints of feeding .

Similar Taxa

Perillus bioculatus (two-spotted stink bug)Also a in Pentatomidae used for of Colorado potato beetle; differs in color pattern with distinct orange and black markings versus the more uniform coloration typical of Podisus
Non-predatory Pentatomidae (e.g., Chinavia hilaris, Halyomorpha halys)Plant-feeding stink bugs in the same ; distinguished by more robust body form, lack of prominent shoulder spines, and herbivorous rather than predatory feeding habits

More Details

Egg Color Plasticity

Podisus maculiventris exhibits unique environmentally cued coloration: females perceive surface light levels and deposit darker eggs on sun-exposed surfaces versus lighter eggs in shade. This represents the first documented case of an animal selectively controlling egg color based on sensory input from the environment. The dark pigment (not melanin, but a potentially novel compound) provides UV protection for eggs laid on upper leaf surfaces.

Insecticide Compatibility

Research on Podisus nigrispinus indicates variable compatibility with : Bacillus thuringiensis and tebufenozide show low , while neurotoxic insecticides (permethrin, thiamethoxam) are highly toxic and not recommended for combined use. Sublethal effects on mating have been documented with neem-based compounds.