Regional Assemblages of Lygus (Heteroptera: Miridae) in Montana Canola Fields

Ritter, Ronan; Lenssen, Andrew W.; Blodgett, Sue L.; Taper, Mark L.

doi:10.2317/jkes0912.23.1

Cited by 11 publications

(6 citation statements)

References 16 publications

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“…Stage of crop maturity had a significant influence on Lygus numbers, with populations increased as crops became more mature (Table 7). Although Lygus were not identified to species in this study, Ritter et al (2010) and Cárcamo et al (2012) reported that L. elisus was the dominant species on B. napus canola in Montana and southern Alberta, respectively. It is, however, not known if Lygus spp.…”

Section: Resultsmentioning

confidence: 63%

“…Native and introduced crucifers are endemic in many areas of the semi‐arid NGP, serving as suitable hosts for important arthropod pests of canola species ( B. napus L. and B. rapa L.) (Brown et al, 2004; Cárcamo et al, 2012; Ritter et al, 2010). Several crucifers also are important weeds in dryland production systems, including flixweed ( Descurainia sophia Webb ex Prantl), tansy mustard [ D. pinnata (Walter) Britton], tall tumble mustard ( Sissymbrium altissimum L.), and small‐seeded false flax ( Camelina microcarpa Andrz.…”

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confidence: 99%

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Yield, Pests, and Water Use of Durum and Selected Crucifer Oilseeds in Two‐Year Rotations

et al. 2012

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Cool‐season oilseed crops are potential feedstock for biofuel production, but few studies have compared oilseed‐durum (Triticum durum Desf.) rotations on yield, quality, water use, and pests associated with crops. We conducted an experiment under dryland conditions during 2007 to 2010 near Culbertson, MT, comparing crop productivity, water balance, and key weed and arthropod pests of 2‐yr oilseed‐durum rotations under zero tillage. Rotations included durum with three Brassicaceae sp., camelina [Camelina sativa (L.) Crantz], crambe (Crambe abyssinica Hochst. ex R.E. Fries), and canola‐quality Brassica juncea L., and fallow. Over 4 yr, B. juncea had the highest seed and oil yields of crucifer entries. Water use was similar among oilseed crops, averaging 286 mm. Water use was similar for durum following oilseeds, averaging 282 mm, 72 mm less than for durum following fallow. Durum following fallow averaged 775 kg ha−1 greater grain yield than durum following oilseeds due to higher water availability and use. Camelina had greater weed biomass at harvest and lower densities of Plutella xylostella L. than other oilseeds. Durum in rotation with crambe had higher weed density and biomass at harvest than durum following B. juncea or fallow. Brassica juncea generally performed better than crambe or camelina, but each oilseed crop had several positive attributes. Oilseed‐durum rotations can be used for biofuel feedstock and grain production, but long‐term sustainability of 2‐yr rotations on crop yields and pest management requires further study.

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Section: Resultsmentioning

confidence: 63%

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confidence: 99%

Yield, Pests, and Water Use of Durum and Selected Crucifer Oilseeds in Two‐Year Rotations

et al. 2012

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“…Lygus hesperus Knight is a non‐model species sympatric with the closely related L. lineolaris that together comprise a complex of morphologically similar polyphagous hemipteran plant bugs in the family Miridae (Schwartz & Foottit, ; Wheeler, ). In the western United States, L. hesperus are significant pests of many economically important crops including cotton, alfalfa, and strawberries (Naranjo, Ellsworth, & Dierig, ; Ritter, Lenssen, Blodgett, & Taper, ; Scott, ; Strand, ; Wheeler, ). Despite being key pests, molecular resources for L. hesperus have only recently been developed (Christie, Hull, Richer, Geib, & Tassone, ; Hull, Geib, Fabrick, & Brent, ; Hull et al, ; Tassone et al, ).…”

Section: Introductionmentioning

confidence: 99%

RNA interference‐mediated knockdown of eye coloration genes in the western tarnished plant bug (Lygus hesperus Knight)

Brent

Hull

2018

Arch Insect Biochem Physiol

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Insect eye coloration arises from the accumulation of various pigments. A number of genes that function in the biosynthesis (vermilion, cinnabar, and cardinal) and importation (karmoisin, white, scarlet, and brown) of these pigments, and their precursors, have been identified in diverse species and used as markers for transgenesis and gene editing. To examine their suitability as visible markers in Lygus hesperus Knight (western tarnished plant bug), transcriptomic data were screened for sequences exhibiting homology with the Drosophila melanogaster proteins. Complete open reading frames encoding putative homologs for all seven genes were identified. Bioinformaticbased sequence and phylogenetic analyses supported initial annotations as eye coloration genes. Consistent with their proposed role, each of the genes was expressed in adult heads as well as throughout nymphal and adult development. Adult eyes of those injected with double-stranded RNAs (dsRNAs) for karmoisin, vermilion, cinnabar, cardinal, and scarlet were characterized by a red band along the medial margin extending from the rostral terminus to the antenna. In contrast, eyes of insects injected with dsRNAs for both white and brown were a uniform light brown. White knockdown also produced cuticular and behavioral defects. Based on its expression profile and robust visible phenotype, cardinal would likely prove to be the most suitable marker for developing gene editing methods in Lygus species.

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“…Lygus spp. affect more than 150 host plants including traditional crops such as cotton, strawberries, and alfalfa (Scott, ; Wheeler, ) as well as emerging oilseed crops that have significant potential as biofuel feedstocks (Butts and Lamb, ; Turnock et al, ; Naranjo et al, ; Ritter et al, ; Naranjo et al, ).…”

Section: Introductionmentioning

confidence: 99%

IDENTIFICATION OF THE WESTERN TARNISHED PLANT BUG (Lygus hesperus) OLFACTORY CO‐RECEPTOR ORCO: EXPRESSION PROFILE AND CONFIRMATION OF ATYPICAL MEMBRANE TOPOLOGY

Hull

Hoffmann

Perera

et al. 2012

Arch Insect Biochem Physiol

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Lygus hesperus (western tarnished plant bug) is an agronomically important pest species of numerous cropping systems. Similar to other insects, a critical component underlying behaviors is the perception and discrimination of olfactory cues. Consequently, the molecular basis of olfaction in this species is of interest. To begin to address this issue, we utilized homology‐based PCR as a commonly accepted abbreviation but if necessary it is polymerase chain reaction methods to identify the L. hesperus olfactory receptor co‐receptor (Orco) ortholog, a receptor that has been shown to be essential for olfaction. The L. hesperus Orco (LhOrco) shares significant sequence homology with known Orco proteins in other insects. Parallel experiments using the sympatric sister species, Lygus lineolaris (tarnished plant bug), revealed that the Lygus Orco gene was completely conserved. Surprisingly, a majority of the membrane topology prediction algorithms used in the study predicted LhOrco to have both the N and C terminus intracellular. In vitro immunofluorescent microscopy experiments designed to probe the membrane topology of transiently expressed LhOrco, however, refuted those predictions and confirmed that the protein adopts the inverted topology (intracellular N terminus and an extracellular C terminus) characteristic of Orco proteins. RT‐PCR analyses indicated that LhOrco transcripts are predominantly expressed in adult antennae and to a lesser degree in traditionally nonolfactory chemosensory tissues of the proboscis and legs. Expression is not developmentally regulated because transcripts were detected in all nymphal stages as well as eggs. Taken together, the results suggest that LhOrco likely plays a critical role in mediating L. hesperus odorant perception and discrimination.

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Regional Assemblages of Lygus (Heteroptera: Miridae) in Montana Canola Fields

Cited by 11 publications

References 16 publications

Yield, Pests, and Water Use of Durum and Selected Crucifer Oilseeds in Two‐Year Rotations

Yield, Pests, and Water Use of Durum and Selected Crucifer Oilseeds in Two‐Year Rotations

RNA interference‐mediated knockdown of eye coloration genes in the western tarnished plant bug (Lygus hesperus Knight)

IDENTIFICATION OF THE WESTERN TARNISHED PLANT BUG (Lygus hesperus) OLFACTORY CO‐RECEPTOR ORCO: EXPRESSION PROFILE AND CONFIRMATION OF ATYPICAL MEMBRANE TOPOLOGY

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