Biologia e tabela de vida de fertilidade de Spodoptera eridania (Cramer) (Lepidoptera: Noctuidae) em morangueiro e videira

Abstract

BIOLOGY, FERTILITY LIFE TABLE AND EFFECT OF INSECTICIDES ON Spodoptera eridania (CRAMER) (LEPIDOPTERA: NOCTUIDAE) IN STRAWBERRY AND GRAPEABSTRACT-The biology of Spodoptera eridania was studied in the laboratory (22±1ºC, RH 70±10%, 14 hours of photoperiod) in leaves of strawberry (Fragaria x ananassa cv. 'Aromas') and grape (Vitis vinifera cv. 'Cabernet Sauvignon'). The duration and viability of the entire cycle were respectively 52.2±1.32 days and 37.6% for strawberry and 42.2±0.45 days and 25.5% for grapes. The sex ratio in strawberry was 0.58 and 0.48 on grape. The average longevity of males and females in strawberry was 16.3±1.16 and 15.8±1.85 days, respectively, and 5.6±0.88 and 7.3±0.83 days in grape. The mean fecundity was 1,747.5±187.32 eggs per female in strawberry and 1,764.9±289.04 on grape. The life table of fertility showed that the net reproduction rate and finite rate of increase were 394.89 and 1.10, respectively, for strawberry and 213.98 and 1.12 for grapevine. Strawberry cv. 'Aromas' and grape cv. 'Cabernet Sauvignon' are suitable hosts providing similar population growth rates of S. eridania.

Biotic potential and reproductive parameters of Spodoptera eridania (Stoll) (Lepidoptera, Noctuidae) in the laboratory

“…Likewise, these values are similar to those described by Parra et al (1977) when the larvae were fed with soybeans, but these values were lower when the larvae were fed with cotton at 27 °C. However, the values were intermediate compared with those found for the same species raised at 22 °C when the larvae were fed with strawberry and grape (Bortoli et al 2012). These results indicate that both larval and adult artificial diets provided the individuals with adequate nutrition, similar to that supplied by the most appropriate plants.…”

“…In the experiments conducted by Mattana & Foerster (1988) and Bortoli et al (2012), there was no significant difference between the average longevity of males and fe-The relatively short pre-oviposition period (Table I), especially in inseminated females (Fig. 2) indicates that in adults of S. eridania reach sexual maturity soon after emergence, as occurs with other representatives of Spodoptera (Habib et al 1983;Tisdale & Sappington 2001).…”

“…But it is relatively high when compared with larvae fed on cotton, morning glory and soybeans, which was: 680.5, 823.9 and 839.6, respectively (Santos et al 2005). However, it was relatively lower than that observed when the larvae were fed with of sweet potato and bracatinga leaves, 1,859.64 and 2,082.73 eggs respectively (Mattana & Foerster 1988), with cotton, 2,922.91 (Parra et al 1977), with tomato, sweet potato, amaranth and Portulaca, 1,863.7 to 2,211.7 eggs (Valverde & Sarmiento 1987a) and when fed with strawberry and grape, 1,747.5 and 1,764.9 eggs (Bortoli et al 2012).…”

“…Spodoptera eridania (Stoll, 1782) stands among the most important species that occurs throughout the American continent (Pogue 2002) and represents a potential risk for different crops like alfalfa, beans, beets, cabbage, cassava, cotton, onion, peanuts, quinoa, soybeans, tobacco, tomato, sweet potato, sunflower and vegetables in different parts of America (Hichings & Rabinovich 1974;Parra et al 1977;Mattana & Foerster 1988;Coto et al 1995;Santos et al 2005Santos et al , 2010Sujii et al 2006;Quintela et al 2007;Valverde 2007;Michereff-Filho et al 2008;Bortoli et al 2012).…”

“…Due to the importance of S. eridania, studies have been developed comparing its biology in several host plants (Parra et al 1977;Valverde & Sarmiento 1987a;Mattana & Foerster 1988;Santos et al 2005;Bortoli et al 2012), but obtaining contrasting results. Such differences may be attributed to the methodologies employed, the host plants, and the differences among populations, as observed for S. frugiperda (Smith, 1797) (Busato et al 2005(Busato et al , 2008Murúa et al 2008).…”