A review of genus Nysius Dallas in Argentina (Hemiptera: Heteroptera: Orsillidae)

Abstract

The orsillid genus Nysius Dallas is a complex and large genus with more than 100 described species worldwide, and includes many species of agricultural importance, one such example is N. simulans (Stål) from Argentina. Three species of Nysius are found in this country: N. simulans (Stål), N. irroratus (Spinola) and N. puberulus Berg. The material available for the present study, consisting of over 610 specimens, was collected by sweep-net, G-Vac and light trap in the provinces of Chubut (42° to 46°S; 63.5° to 72° W), La Pampa (35º to 39º south; 63º to 68º West), Neuquén (36° to 41° S; 68° to 71°W) and Río Negro (37° to 42°S; 62° to 71°W), in the central region of Argentina, during the years 2010-2014. Although the species N. simulans is frequently recorded as a pest of soybean crop, there exist no detailed description but only a brief general diagnosis. In the present contribution, therefore, we provide a detailed redescription as well as an updated distribution of N. simulans and N. irroratus, and a key for species of genus Nysius present in Argentina.

Inventory of some families of Hemiptera, Coleoptera (Curculionidae) and Hymenoptera associated with horticultural production of the Alto Valle de Río Negro and Neuquén provinces (Argentina)

“…Nysius simulans Stål Geographic distribution. Argentina: Buenos Aires, Catamarca, Chaco, Chubut, Córdoba, Corrientes, Entre Ríos, La Pampa, La Rioja, Mendoza, Misiones, Neuquén, Río Negro, Salta, San Juan, San Luis, Santa Fe, Santiago del Estero and Tucumán (Dellapé, 2014;Pall et al, 2016;.…”

First Record, Prevalent Hosts, Biological and Managing Attributes of False Chinch Bug (Hemiptera: Lygaeidae) Injuring Helianthus annuus, Brassica and Chenopodium from Punjab, Pakistan

“…Hibernations are under mulch overs of litters, plant debris and crop remnants, usually in adult forms [6,1,4]. Eggs are about, in length 1.5 mm and in width 0.4 mm, with coloration variation of pinkish transparent to cream white [6,17]. The oviposition localities are may be porous soil, debris places, or most preferably petals crevices on floral regions.…”

“…The oviposition localities are may be porous soil, debris places, or most preferably petals crevices on floral regions. Nymphal stages are 5 with color similarity of off-grey color and reddish to brown abdomens [17]. All the mature to immature insect phases can be found impairing the plant tissues, simultaneously.…”

“…A clear chlorosis and leaf yellowing with concurrent leaf dryness is observed. Damage is least when a single feeder is there but plant wilting with ultimate plant killing is observed when gregarious feeding groups are found on plant parts, under lethal infestations [4,17,10].…”

“…On global scale there are about 100 species of the genus Nysius [17], found to be associated with plant phagous behaviors and only 6 reached the economic pest status on varying important crops of Brassica, Helianthus and Chenopdum [1,18,17] Entomol Ornithol Herpetol 7: 208. doi:10.4172/2161-0983.1000208 [12,13,4,17]. During the whole survey and collection season, the developmental Nysius stages were found on the plant families in whole regions.…”