Dicyphini

Dicyphini can be distinguished from other Miridae tribes by features of the male genitalia and pretarsal structures; an updated key to Dicyphini species is available for Uruguay. Within the tribe, genera are distinguished by body size, coloration, and antennal proportions. Macrolophus species are generally smaller and more slender than Dicyphus species.

Agricultural ecosystems, particularly protected cultivation (greenhouses) and vegetable crops; some species have established populations in urban/peri-urban areas following introduction for biological control.

Worldwide distribution with variable regional representation; Nesidiocoris tenuis is commercially distributed globally for Mediterranean greenhouses, Dicyphus cerastii occurs in the Palearctic and Mediterranean Basin including Portugal, Macrolophus pygmaeus has established in New Zealand (first recorded in Auckland, 2007), and Engytatus varians occurs in the Neotropics including Mexico, Cuba, and Eastern Uruguay.

Zoophytophagous: predatory on horticultural pests including whiteflies (Aleyrodidae), Tuta absoluta, and other lepidopteran eggs; plant feeding provides water and nutrients and intensifies during prey scarcity. Alternative prey includes Ephestia kuehniella eggs and Artemia spp. in laboratory rearing.

• Solanaceae - host plantprimary crop association, especially tomato (Solanum lycopersicum) and tobacco (Nicotiana tabacum)
• Aleyrodidae - preywhiteflies, target pests for biological control
• Tuta absoluta - preytomato leafminer, target pest for biological control
• Ephestia kuehniella - alternative preylaboratory rearing
• Artemia spp. - alternative preylaboratory rearing

Development includes egg, nymph (with at least 4th and 5th instars distinguished in studies), and adult stages. Rearing protocols involve collection of large nymphs for transfer to separate cages to complete development.

Phytophagy increases when prey is scarce. Feeding damage patterns differ among species: Dicyphus cerastii produces necrotic patches on petioles and aggregated punctures on fruit, while Nesidiocoris tenuis produces necrotic rings on stems/petioles in addition to patches, occasionally causing withering of young shoots. Both species cause flower abortion and produce persistent scar punctures on fruit that do not heal through maturation. Dicyphus cerastii shows increased frequency on plants over time, unlike Nesidiocoris tenuis.

Biological control agents in conservation and augmentative strategies for vegetable crops; generalist predators that reduce populations of whiteflies and lepidopteran pests. Phytophagy can cause economic damage to crops, requiring careful management to balance pest control benefits against plant injury risks.

Commercially important for biological pest control in greenhouse tomato production and other protected vegetable crops. Species such as Nesidiocoris tenuis, Dicyphus cerastii, and Macrolophus pygmaeus are mass-reared and sold as biocontrol products. Establishment of non-native species (e.g., Macrolophus pygmaeus in New Zealand) has occurred through intentional release and natural spread.

• Other Bryocorinae tribesDicyphini distinguished by pretarsal structures and male genitalia; other tribes in the subfamily lack the combination of zoophytophagous habit and specific damage symptoms on Solanaceae

• Miridae
• Bryocorinae
• biological control
• zoophytophagous
• greenhouse pests
• tomato
• whitefly predator
• phytophagy
• augmentative biological control
• Solanaceae

• BugGuide
• Wikipedia
• iNaturalist taxon
• NCBI Taxonomy
• First report of Engytatus varians (Distant, 1884) (Heteroptera: Miridae: Dicyphini) in Eastern Uruguay and preliminary test on its feeding habits
• First New Zealand record of the genus Macrolophus Fieber, 1858 (Hemiptera: Miridae: Bryocorinae: Dicyphini): Macrolophus pygmaeus (Rambur, 1839), a beneficial predacious insect
• Half Friend, Half Enemy? Comparative Phytophagy between Two Dicyphini Species (Hemiptera: Miridae).