title: Hormetic responses of a stinkbug predator to sublethal doses of pyrethroid.
abstract: Stressors can affect reproduction and longevity by impacting endocrine and immune systems but they may increase life span and stimulate reproduction. The effects of sublethal doses of permethrin topically applied on third instar nymphs of Podisus distinctus (Heteroptera: Pentatomidae) was evaluated. The weight of females survival of nymph and adults, number of eggs and nymphs/females of P. distinctus were higher when exposed to lower doses of permethrin. On the other hand, the exposition to the 0.131, 1.315 and 13.15 ppb showed positive effects on the oviposition periods, number of egg masses and longevity of P. distinctus females.
authors.affiliation: Departamento de Biologia Animal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 35670-000, Brazil. zanuncio@ufv.br
authors.forename: José C
authors.initials: JC
authors.lastname: Zanuncio
authors.forename: Pedro
authors.initials: P
authors.lastname: Jusselino-Filho
authors.forename: Rafael C
authors.initials: RC
authors.lastname: Ribeiro
authors.forename: Teresinha V
authors.initials: TV
authors.lastname: Zanuncio
authors.forename: Francisco de S
authors.initials: Fde S
authors.lastname: Ramalho
authors.forename: José E
authors.initials: JE
authors.lastname: Serrão
mesh_terms: D000818:Animals; D004305:Dose-Response Relationship, Drug; D004781:Environmental Exposure; D005260:Female; D020062:Heteroptera / Q000187:drug effects*; D059165:Hormesis; D007300:Insect Control; D007306:Insecticides / Q000633:toxicity*; D008136:Longevity / Q000187:drug effects; D009758:Nymph / Q000187:drug effects; D010058:Oviposition / Q000187:drug effects; D010063:Ovum / Q000187:drug effects; D026023:Permethrin / Q000633:toxicity*; D012044:Regression Analysis; D013312:Stress, Physiological; D059551:Toxicity Tests, Subacute / Q000379:methods
chemical_list: D007306:Insecticides; D026023:Permethrin