Oviposition and larval development of a stem borer, <i><scp>E</scp>oreuma loftini</i>, on rice and non‐crop grass hosts

Beuzelin, J. M.; Wilson, L. T.; Showler, Allan T.; Mészáros, Ádám; Wilson, B. H.; Way, M. O.; Reagan, T. E.

doi:10.1111/eea.12031

Cited by 18 publications

(16 citation statements)

References 33 publications

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“…Female solanaceous weevils of the species T. compacta and T. mucorea are able to choose suitable plants for their offspring: the positive correlation between female preference for oviposition and larval performance is consistent with the expectations of the optimal oviposition theory (Karungi et al 2010;Zhang et al 2012;Akol et al 2013;Beuzelin et al 2013). However, T. compacta and T. mucorea females did not choose nicotine-free and JA-deficient N. attenuata plants, respectively, for their offspring, although their larvae performed better in these transgenic lines.…”

Section: Discussionmentioning

confidence: 57%

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Trichobaris weevils distinguish amongst toxic host plants by sensing volatiles that do not affect larval performance

et al. 2016

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Herbivorous insects use plant metabolites to inform their host plant selection for oviposition. These host-selection behaviours are often consistent with the preference-performance hypothesis; females oviposit on hosts that maximize the performance of their offspring. However, the metabolites used for these oviposition choices and those responsible for differences in offspring performance remain unknown for ecologically relevant interactions. Here, we examined the host-selection behaviours of two sympatric weevils, the Datura (Trichobaris compacta) and tobacco (T. mucorea) weevils in field and glasshouse experiments with transgenic host plants specifically altered in different components of their secondary metabolism. Adult females of both species strongly preferred to feed on D. wrightii rather than on N. attenuata leaves, but T. mucorea preferred to oviposit on N. attenuata, while T. compacta oviposited only on D. wrightii. These oviposition behaviours increased offspring performance: T. compacta larvae only survived in D. wrightii stems and T. mucorea larvae survived better in N. attenuata than in D. wrightii stems. Choice assays with nicotine-free, JA-impaired, and sesquiterpene-over-produced isogenic N. attenuata plants revealed that although half of the T. compacta larvae survived in nicotine-free N. attenuata lines, nicotine did not influence the oviposition behaviours of both the nicotine-adapted and nicotine-sensitive species. JA-induced sesquiterpene volatiles are key compounds influencing T. mucorea females' oviposition choices, but these sesquiterpenes had no effect on larval performance. We conclude that adult females are able to choose the best host plant for their offspring and use chemicals different from those that influence larval performance to inform their oviposition decisions.

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Section: Discussionmentioning

confidence: 57%

“…; Beuzelin et al . ). However, T. compacta and T. mucorea females did not choose nicotine‐free and JA‐deficient N. attenuata plants, respectively, for their offspring, although their larvae performed better in these transgenic lines.…”

Section: Discussionmentioning

confidence: 97%

Trichobaris weevils distinguish amongst toxic host plants by sensing volatiles that do not affect larval performance

et al. 2016

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“…However, barnyardgrass and Vasey's grass, which did not have detectable accumulations of fructose, harbor appreciable numbers of Mexican rice borer eggs and larvae (Beuzelin et al., ; Showler et al., ). Hence, other biochemical, physical, and ecological factors probably have roles in larval Mexican rice borer host plant utilization (Beuzelin et al., ).…”

Section: Discussionmentioning

confidence: 99%

Associations between host plant concentrations of selected biochemical nutrients and Mexican rice borer, Eoreuma loftini, infestation

Showler

Moran²

2014

Entomologia Exp Applicata

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The Mexican rice borer, Eoreuma loftini (Dyar) (Lepidoptera: Crambidae), is an economic pest of sugarcane (Saccharum spp. hybrids) and other graminaceous host crops, and it attacks grassy weeds. Oviposition preference has been known to be for plants with leaves that form folds. This study is the first to associate the nutritional quality of crop and forage plant hosts with Mexican rice borer injury. Three experiments were conducted to determine the levels of selected biochemical nutrients, including free amino acids and sugars, in four grass weeds [barnyardgrass, Echinochloa crus‐galli (L.); broadleaf signalgrass, Urochloa platyphylla (Munro ex C. Wright); johnsongrass, Sorghum halepense (L.) Pers.; and Vasey's grass, Paspalum urvillei Steud.], a forage grass [sudangrass, Sorghum bicolor (L.) Moensch spp. drummondi (Nees ex Steud.) de Wet & Harlan], three crop species [maize, Zea mays L.; sorghum, Sorghum bicolor (L.) Moench; and sugarcane, Saccharum spp.], and a sorghum‐sudangrass forage hybrid (all Poaceae). Of 16 free amino acids detected among plants in the first two experiments, only high accumulations of free histidine in sudangrass and maize were associated with increased infestations by Mexican rice borer larvae. In all three experiments, high levels of fructose were associated with heightened Mexican rice borer infestation. Ramifications of these findings on the potential dispersal of this invasive pest in the USA and possible applications of fructose in baits are discussed.

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“…Sugarcane stubble in fallow fields that are plowed into the soil can reduce overwintering E. loftini larvae, and planting pest-free seed pieces improves the development of setts (clumps of stalks growing from the same buried stalk node) [49]. Although early planting has shown some efficacy against D. saccharalis [50], planting dates have not been evaluated for their effects on E. loftini in sugarcane.…”

Section: Fallow and Planting Datementioning

confidence: 99%

Mexican Rice Borer Control Tactics in United States Sugarcane

Showler¹

2019

Insects

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The invasive Mexican rice borer, Eoreuma loftini (Dyar), expanded its range from Mexico to South Texas in the early 1980s. By 2008 the pest had moved into sugarcane- and rice-growing areas of East Texas and Louisiana, and by 2012 it was reported on noncrop host plants in Florida. Efforts to suppress E. loftini in United States sugarcane with chemicals and biological control agents were unsuccessful, so both tactics were discontinued, and E. loftini infestation of sugarcane has continued unchecked. During the last 15 years, however, research has focused on the pest’s ecology, improved insecticides and scouting methods, the identification of sugarcane resistance mechanisms, and new cultural tactics. A surveillance technique was developed that indicates when larvae are most vulnerable to insecticide sprays. Currently, registered insecticides for E. loftini control are not widely applied, although some show promise, including an insect growth regulator. A number of potentially useful cultural practices are available, including plowing under fallow stubble, judicious use of fertilizer, adequate irrigation, avoiding proximity to E. loftini-susceptible maize cultivars, and enhancement of natural enemy populations. Demonstrated and potentially useful sugarcane resistance mechanisms involve physiochemical attributes, physical characteristics, and transgenic cultivars.

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Oviposition and larval development of a stem borer, Eoreuma loftini, on rice and non‐crop grass hosts

Cited by 18 publications

References 33 publications

Trichobaris weevils distinguish amongst toxic host plants by sensing volatiles that do not affect larval performance

Trichobaris weevils distinguish amongst toxic host plants by sensing volatiles that do not affect larval performance

Associations between host plant concentrations of selected biochemical nutrients and Mexican rice borer, Eoreuma loftini, infestation

Mexican Rice Borer Control Tactics in United States Sugarcane

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