Resistência de gramíneas a Mahanarva fimbriolata (Stål, 1854) (Hemiptera: Cercopidae)

Development of the SpittlebugMahanarva fimbriolataunder Varying Photophase Conditions

“…Similarly, Garcia ( 2006 ) found no significant difference in this parameter for both sexes in 10-, 12-, and 14-hr photoperi-ods, despite having observed a higher average longevity than that in our study. Grisoto ( 2008 ) also reported no differences in longevity between males and females during a 14-hr photophase. However, Garcia et al ( 2006 ) reported significant differences in longevity between males and females in a 14-hr photophase.…”

“…This difference may be due to the plant species offered as food for insects, as evident in the work of Grisoto (2008), wherein the longevity was 2.5 times higher for males fed on sugarcane culti-var SP 80-1842 compared to those fed on Brachiaria brizantha cultivar IAC-BBS8.…”

“…Grisoto (2008) found that sex ratio ranged from 0.35 to 0.76 in M. fimbriolata , although plant species had no effect on sex ratio.…”

“…Garcia et al ( 2006 ) found adult longevities that were 3 times higher than those reported in our study for the same cercopid species under similar climatic conditions. This difference may be due to the plant species offered as food for insects, as evident in the work of Grisoto ( 2008 ), wherein the longevity was 2.5 times higher for males fed on sugarcane culti-var SP 80-1842 compared to those fed on Brachiaria brizantha cultivar IAC-BBS8.…”

“…The sex ratio of M. fimbriolata was similar to that described by Garcia et al ( 2006 ), who found a 0.50 sex ratio in three successive generations when insects were under a 14-hr photophase. Grisoto ( 2008 ) found that sex ratio ranged from 0.35 to 0.76 in M. fimbriolata , although plant species had no effect on sex ratio.…”