Parasitoides associados com Helicoverpa armigera em áreas de refúgio de algodão, no Oeste da Bahia, Brasil LuzPriscila Maria Colombo da Paula-MoraesSilvana Vieira de LópezJuan Manuel Perilla Pujol-LuzJosé Roberto Penteado-DiasAngélica Maria SpechtAlexandre DinizIvone Rezende 2017 <div><p>ABSTRACT: Natural biological control is one of the major causes responsible for reduction of pest population in agricultural ecosystem. However, natural biological control importance is usually minimized by not being estimated. This study reports the occurrence of Campoletis sonorensis (Cameron, 1886) (Hymenoptera: Ichneumonidae), Archytas marmoratus (Townsend, 1915) and Archytas incertus (Macquart, 1851) (Diptera: Tachinidae) associated with Helicoverpa armigera (Hübner, 1809) (Lepidoptera: Noctuidae). The rate of larval parasitism was up to 41% in structured refuge areas of cotton, without chemical control with insecticides. This study strengthens our knowledge relating to parasitoids associated with natural control of H. armigera in the American continent. In addition, it documents the rule that structured refuge areas could play as a source of natural enemies, besides their contribution to production of non-selective populations to Bt technology.</p></div>