Evaluation of forage grass resistance to Mahanarva fimbriolata (Stål)

Abstract

ABSTRACT:The aim of this study was to select forage grasses with potential resistance to Mahanarva fimbriolata by assessing effects on insect. No-choice assays were conducted with 12 genotypes and laboratory-reared insects. The following parameters were assessed: mortality and duration of the nymphal stage; adult weight and longevity; pre-oviposition period; number of eggs/female; viability and duration of the embryonic period. As main result it was verified that the mortality of nymphs reared on Panicum maximum cv.Paredão is almost complete and that this forage grass may be

Spittlebugs (Hemiptera: Cercopidae): Integrated Pest Management on Gramineous Crops in the Neotropical Ecozone

“…Breeding for resistance to spittlebug attack is the main approach to generate a sustainable and long-term control strategy being easily adopted by producers at a low cost (Valério et al, 2001;Valério, 2013;Grisoto et al, 2018). Antibiosis, tolerance, and antixenosis have been reported for grasses and sugarcane (Miles et al, 1995;Cardona et al, 2004;Dinardo-Miranda et al, 2016).…”

Biological aspects of Blissus pulchellus Montadon (Hemiptera: Blissidae) regarding the resistance of forage poaceae

“…Zuri, and U. humidicola (Table 2). According to Grisoto et al (2018), insects fed on resistant plants tend to have longer biological cycle length, which is increased mainly, by increasing the nymphal stage.…”

“…The incubation period ranged from 10.3 ± 0.27 to 11.3 ± 0.25 days, but there was no significant difference between the species (Table 3). Although the length of this period is one of the least important characteristics for resistance characterization, there is a tendency for eggs from insects reared on hosts with antibiosis-type resistance to have their incubation period increased and viability decreased (Grisoto et al, 2018).…”