Biologia e tabela de vida de fertilidade de Agrotis ipsilon em dieta artificial

Abstract

Resumo -O objetivo deste trabalho foi desenvolver uma dieta artificial para criação de Agrotis ipsilon em laboratório com base em parâmetros biológicos e na tabela de vida de fertilidade. A dieta artificial utilizada continha feijão, caseína, proteína de soja, levedura e germe de trigo como fontes protéicas. Os parâmetros biológicos duração e viabilidade das fases larval e pupal, peso de pupas, de ambos os sexos, com 24 horas de idade, razão sexual, longevidade dos adultos, período de pré-oviposição e número de ovos produzidos por fêmea e a tabela de vida de fertilidade foram avaliados. Foram observados seis ínstares larvais com duração de 25,4 dias e viabilidade de 93%. A duração da fase pupal foi de 12,4 dias e viabilidade de 96%. A viabilidade de ciclo total foi 72%. O peso de pupas foi 387 mg (machos) e 484 mg (fêmeas). A razão sexual foi 0,46. O período de pré-oviposição foi de um dia, com 1.806 ovos por fêmea. Na tabela de vida verificou-se que a taxa líquida de reprodução e a razão finita de aumento foram 616,9 e 1,14, respectivamente. A dieta artificial é adequada à manutenção da criação de A. ipsilon, em laboratório.Termos para indexação: lagarta-rosca, criação, praga de solo, Noctuidae. Biology and fertility life table of Agrotis ipsilon on artificial dietAbstract -The objective of this work was to develop an artificial diet to rear Agrotis ipsilon in laboratory using biological parameters and fertility life table. The artificial diet was prepared with bean, casein, soybean protein, yeast and wheat germ as protein sources. The biological aspects duration and viability of larval and pupal stages, pupal weight, sex ratio, life span of adults, preoviposition period, egg laying capacity and fertility life table were evaluated. Six larval instars were observed comprising larval duration of 28,4 days and 93% of viability mean pupal duration of 12,4 days and viability of 96%. The total viability of the life cycle was 72%. The pupae weight was 387 mg for males and 484 mg for females. The sex ratio was 0,46 and the preoviposition period lasted one day and egg laying was 1,806 eggs per female. The net reproductive rate per generation and increase finite rate were 616,9 and 1,14, respectively. Artificial diet is adequate for rearing A. ipsilon in laboratory.

The Granulate Cutworm (Lepidoptera: Noctuidae): Biological Parameters Under Controlled Conditions, Host Plants, and Distribution in the Americas

“…The dissimilarity may be related to the adequacy of the larval diet (Scheider 2009), pupal weights, and/or the adequacy of the adult diet. However, the high fecundity of F. subterranea in the present study is similar to the fecundity of other species of cutworms that can lay an average of 2,000 eggs (e.g., Archer et al 1980 , Bento et al 2007 , Specht et al 2013 ).…”

“…Feltia subterranea development duration is similar to that observed by Vendramim et al (1982) using the same temperature conditions with both kale leaves and a similar, but different formulated pinto bean-based artificial diet as larval food. The development duration is also similar to other cutworm species that do not go through diapause, especially regarding the relative durations of each development stage, as Agrotis ipsilon (Hufnagel, 1767) (black cutworm) ( Bento et al 2007 ); Peridroma saucia (Hübner, 1808) (variegated cutworm) ( Moreno Farjado and Serna Cardona 2006 ); and Anicla infecta (Ochsenheimer, 1816) (green cutworm) ( Teston et al 2001 ). Preliminary data of pupal recovery from digging in fallow fields in the Florida Panhandle, Jay, FL, which is a transition zone between temperate and tropical areas, indicated no diapause condition and adults emerge approximately in 1 week (S.V.P.M.).…”

Life-History Parameters of Striacosta albicosta (Lepidoptera: Noctuidae) Under Laboratory Conditions

“…Our results indicate that the duration of the S. albicosta incubation period is short, ranging from 4 to 5 d for the majority of the eggs (Table 1), similar to that observed by Hagen (1962) and shorter when compared with Douglass et al (1957) and Hoerner (1948), who reported 7 d on average under similar conditions. The average incubation period of S. albicosta reported here is also shorter when compared with other noctuid species that also present long diapause, such as Agrotis malefida Guenée (Lepidoptera: Noctuidae) at 7.93 d (Specht et al 2013) and Feltia submontana Köhler (Lepidoptera: Noctuidae) at 7.09 d (Dias et al 2019), whereas species that do not diapause present shorter incubation time, such as Agrotis ipsilon (Hufnagel) (Lepidoptera: Noctuidae) at 3.3 d (Bento et al 2007). Reporting an accurate egg incubation period is crucial for integrated pest management strategies.…”

“…Another important observation from our study is the high fertility of field-collected females, almost twice that reported in previous studies (Hoerner 1948, Hagen 1962, Difonzo 2009, Paula-Moraes et al 2012). Although fertility of 76% is high compared with previously published literature for S. albicosta , this is fairly low when compared with other cutworm species, such as A. ipsilon at 93% (Bento et al 2007), A. malefida at 97% (Specht et al 2013), Spodoptera dolichos (Fabricius) (Lepidoptera: Noctuidae) at 98% (Montezano et al 2016), and Spodoptera frugiperda (Lepidoptera: Noctuidae) at 97% (Montezano et al 2019). The relatively low fertility presented by S. albicosta , especially among laboratory-reared adults, may once again be attributed to the laboratory conditions that were less ideal compared with field conditions.…”

Management Practices for Insect Resistance in Bt Maize

“…Black cutworm, from the genus Agrotis, constitute an important group of insect pests, mainly due to damages to the large number of cultivated plants and their wide geographic distribution. Agrotis ipsilon is the main species of black cutworm referred to in Brazil and is a polyphagous insect, which attacks mainly horticultural crops [7]. It can also attack other species of different plant families, in crops such as maize, soybeans, beans, and cotton [8].…”