Neonicotinoid-resistance
Guides
Blissus occiduus
Western Chinch Bug
Blissus occiduus, the western chinch bug, is a phloem-feeding true bug (Hemiptera: Blissidae) that is a significant pest of warm-season turfgrasses, particularly buffalograss and zoysiagrass. The species exhibits strong host preference hierarchies, with buffalograss being the most preferred host followed by zoysiagrass, though it can survive and reproduce on a broad range of grasses including agronomic crops. Field studies have documented inconsistent control with neonicotinoid insecticides, with thiamethoxam showing particularly rapid degradation in buffalograss tissues compared to imidacloprid and clothianidin.
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ere-spherecollective-sphere-sphere-spherecommunity-sphere-sphere-spheresocietal-sphere-sphere-sphereglobal-sphere-sphere-spherelocal-sphere-sphere-spherenational-sphere-sphere-sphereregional-sphere-sphere-spherelandscape-sphere-sphere-sphereseascape-sphere-sphere-spherewaterscape-sphere-sphere-sphereairscape-sphere-sphere-spherebiosphere-sphere-sphere-spherenoosphere-sphere-sphere-spheretechnosphere-sphere-sphere-spheresociosphere-sphere-sphere-sphereecosphere-sphere-sphere-spherehydrosphere-sphere-sphere-sphereatmosphere-sphere-sphere-spherelithosphere-sphere-sphere-spherepedosphere-sphere-sphere-spherecryosphere-sphere-sphere-sphereanthroposphere-sphere-sphere-sphereHomalodisca vitripennis
Glassy-winged Sharpshooter
Homalodisca vitripennis, commonly known as the glassy-winged sharpshooter, is a large leafhopper native to the southeastern United States and northeastern Mexico. It has become a major invasive pest in California, Hawaii, and the Pacific Islands, where it vectors Xylella fastidiosa, the bacterium causing Pierce's disease of grapevine—a lethal condition for vineyards. The species exhibits complex vibrational communication during mating, with males and females engaging in duets using species-specific signals. Populations in California's Central Valley have developed significant resistance to neonicotinoid insecticides, particularly imidacloprid, creating challenges for chemical management. Classical biological control using egg parasitoids from the genus Gonatocerus (family Mymaridae) has proven effective, with parasitism rates reaching 80-100% in some areas.
Psylliodes chrysocephala
cabbage-stem flea beetle, cabbage stem flea beetle
Psylliodes chrysocephala, the cabbage-stem flea beetle, is a small flea beetle native to the Western Palaearctic and introduced to Canada. It is a major agricultural pest of winter oilseed rape (Brassica napus) in northern Europe, with adults feeding on leaves and larvae mining within petioles and stems. The species exhibits an obligatory summer aestivation period to survive heat and desiccation stress, with complex physiological and genetic mechanisms regulating this dormancy. Management has become increasingly difficult due to neonicotinoid bans and rising pyrethroid resistance.
Sphenophorus callosus
Southern Corn Billbug
Sphenophorus callosus, commonly known as the southern corn billbug, is a weevil species in the family Dryophthoridae (formerly placed in Curculionidae) that is a significant agricultural pest of corn in eastern North Carolina. Historically widespread and damaging throughout the southeastern United States, its impact has become regionally restricted due to modern management practices, particularly insecticidal seed treatments. The species is univoltine with a narrow host range, reproducing primarily on corn and yellow nutsedge.