Biology and fertility life table of Mahanarva fimbriolata (Stål) (Hemiptera: Cercopidae) in sugarcane

Abstract

Mahanarva fimbriolata (Stål) (Hemiptera: Cercopidae) is the most important pest of sugarcane harvested without the use of fire to burn leaf trash. Its biology was studied for three generations in order to obtain basic information about its life cycle. A fertility life table was used to evaluate the quality of laboratory-reared insects. Data were obtained at a temperature of 25 ± 1ºC, RH of 70 ± 10%, and a 14-hour photophase. The incubation period lasted 21 days with a viability of 81%; the nymph stage had a duration of 37 days, with a 94% viability; the male and female longevities were 18 and 23 days, respectively, with a pre-oviposition period of 5 days and an oviposition period of 16 days, with a fecundity of 342 eggs, with a life-cycle (egg-adult) of 60 days. A net reproductive rate (Ro) of 131 females produced per female per generation was measured, with a finite rate of increase (λ) of 1.085. The fertility life table proved to be adequate to be evaluate the quality of laboratory-reared M. fimbriolata populations.

Laboratory rearing technique of Mahanarva fimbriolata (Stål) (Hemiptera: Cercopidae)

“…Barbosa et al (1980) observed, on average, 146 eggs per M. fimbriolata female. Garcia et al (2006) observed that the eggs had a high viability of 81%, on average. These values evidence that both, the methodology used to obtain and remove eggs and the form by which they are maintained during the embryonic development period, are effective.…”

“…The mean fecundity (number of eggs per female) was 342 (Garcia et al, 2006). This value is higher than those reported in literature because, accord-Sci.…”

“…The developed technique does not alter the characteristics of the wild insects and could be used to have insects in laboratory which were similar to those collected in the field (Garcia et al, 2006). Thus, it was possible to produce eggs, nymphs, and adults of known ages for experimental purposes year-round, which facilitates basic bioecology and management studies, including the various controlling methods for this pest.…”

Efeitos da fertirrigação sobre a ocorrência e danos de Mahanarva fimbriolata (Stål) (Hemiptera: Cercopidae) em cana-de-açúcar

“…Os danos de M. fimbriolata são causados principalmente devido à sucção de ninfas nos vasos do xilema e floema evitando o fluxo de água e nutrientes e, consequentemente, reduzindo a produtividade de colmos de cana-de-açúcar (Garcia et al, 2006;Garcia et al, 2010). Além dos danos diretos na produtividade, o ataque desse inseto pode provocar alterações na qualidade da cana-de-açúcar por meio da redução do teor de açúcar do colmo e aumento no teor de fibra.…”

Avaliação de tipos de resistência de gramíneas forrageiras à cigarrinha das-raízes Mahanarva fimbriolata (Stål, 1854) (Hemiptera: Cercopidae)

“…As fêmeas são de coloração marromescura com manchas longitudinais e os machos apresentam coloração de vermelhovivo a amarelo-palha, medindo cerca de 13 mm de comprimento e 6 a 7 mm de largura. Fêmeas e machos vivem em torno de 22,6 e 17,1 dias, em média, respectivamente, e as fêmeas chegam a ovipositar 342 ovos durante toda a fase reprodutiva, com período médio de pré-oviposição de 5 dias (GARCIA; PARRA, 2006). Após a cópula, as fêmeas, de maneira geral, permanecem próximas às touceiras, local preferido para oviposição, colocando os ovos no solo próximo à vegetação ou preferencialmente em tecidos mortos na base das touceiras (MENDONÇA, 1996).…”