Evaluating Penetration Ability of (Hübner) (Lepidoptera: Pyralidae) Larvae into Multilayer Polypropylene Packages.

The larvae of the Indian meal moth, (Hübner), can invade or penetrate packaging materials and infest food products. Energy bars with three polypropylene packaging types were challenged with eggs (first instars), third instars, and fifth instars of to determine package resistance at 28 °C and 65% r.h.

Efficacy of a New Deltamethrin Formulation on Concrete and Wheat Against Adults of Laboratory and Field Strains of Three Stored-Grain Insect Species.

Efficacy of the suspension concentrate formulation of deltamethrin (Centynal) was evaluated at labeled rates on concrete surfaces and hard red winter wheat against 12 field strains of the red flour beetle, Tribolium castaneum (Herbst); six strains of the sawtoothed grain beetle, Oryzaephilus surinamensis (L.); and four strains of the lesser grain borer, Rhyzopertha dominica (F). The time for ≍100% mortality of adults of laboratory strains was first established by exposing them to deltamethrin-treated concrete at the highest labeled rate of 0.

Variation in susceptibility of field strains of three stored grain insect species to spinosad and chlorpyrifos-methyl plus deltamethrin on hard red winter wheat.

Spinosad and chlorpyrifos-methyl plus deltamethrin efficacy at labeled rates on hard red winter wheat were evaluated against 11 field strains of the red flour beetle, Tribolium castaneum (Herbst); six strains of the sawtoothed grain beetle, Oryzaephilus surinamensis (L.); and two strains of the lesser grain borer, Rhyzopertha dominica (F.), collected mostly from farm-stored grain in Kansas.

Variation in susceptibility of laboratory and field strains of three stored-grain insect species to β-cyfluthrin and chlorpyrifos-methyl plus deltamethrin applied to concrete surfaces.

Background: The efficacy of commercial formulations of β-cyfluthrin and chlorpyrifos-methyl plus deltamethrin applied to clean, concrete surfaces similar to that of empty bins against field strains of stored-grain insects is unknown. We exposed adults of 16 strains of the red flour beetle, Tribolium castaneum (Herbst); eight strains of the sawtoothed grain beetle, Oryzaephilus surinamensis (L.); and two strains of the lesser grain borer, Rhyzopertha dominica (F.