Generalized host‐plant feeding can hide sterol‐specialized foraging behaviors in bee–plant interactions

Beres, B. L., Cárcamo, H. A., Byers, J. R., Clarke, F. R., Pozniak, C. J., Basu, S. K. and DePauw, R. M. 2013. Host plant interactions between wheat germplasm source and wheat stem sawfly Cephus cinctus Norton (Hymenoptera: Cephidae) I. Commercial cultivars. Can. J. Plant Sci. 93: 607–617. The wheat stem sawfly (WSS) Cephus cinctus Norton (Hymenoptera: Cephidae) is an economically destructive insect pest of wheat in the northern Great Plains. A significant resurgence of the insect pest in the southern prairies of Canada caused substantial economic losses from 1999 through 2007. Solid-stem cultivar selection is critical to the management of WSS but adoption of the use of these cultivars was low, which compounded losses at harvest. A study was conducted from 2001 to 2003 in southern Alberta and Saskatchewan, Canada (1) to establish the range of susceptibility of hollow- and solid-stem varieties representing the major spring wheat classes and (2) to determine the impact of host plant on WSS population dynamics. The solid-stem varieties were generally superior at reducing damage and fitness response of WSS. However, in addition to the durum cultivars AC Navigator and AC Avonlea, the variety McKenzie, which was considered hollow, provided improved efficacy over other hollow-stem cultivars. Our study suggests solid-stem cultivars are highly effective but prone to inconsistent performance and should therefore be integrated into a holistic strategy for WSS that includes agronomics and biocontrol. A companion paper will report on the response of cultivars with novel sources of germplasm.

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Seasonal Variation in Bee-Plant Interactions in an Inselberg in the Atlantic Forest in Southeastern Brazil

Sociobiology ◽

10.13102/sociobiology.v65i4.3473 ◽

2018 ◽

Vol 65 (4) ◽

pp. 612 ◽

Cited By ~ 1

Author(s):

Marcelita França Marques ◽

Mariana Scaramussa Deprá ◽

Maria Cristina Gaglianone

Keyword(s):

Plant Species ◽

Atlantic Forest ◽

Temporal Dynamics ◽

Interaction Network ◽

Dry Season ◽

Floral Resources ◽

Southeastern Brazil ◽

Plant Interactions ◽

Wet Season ◽

Bee Plant

Studies on bee-plant interactions are relevant to the understanding of temporal patterns in neotropical communities. In isolated habitats such as inselbergs little is yet known about the temporal dynamics in the availability of fl oral resources and interacting bee. In the present study, the objective is to verify the eff ect of seasonality on the bee-plant interaction in an Atlantic Forest inselberg in southeastern Brazil. The bees were sampled monthly in the dry (April/2008-September/2008) and wet seasons (October/2008-March/2009) using an entomological net. A total of 322 bees of 33 species were captured on fl owers of 34 species of plants during the year. Bees richness was similar between seasons (22 species in the wet season and 21 in the dry season), but abundance was higher in the wet season (60% of individuals) and higher diversity occurred in the dry season. Augochloropsis sp1 were the most abundant species and visited the largest number of plant species at each season. In the interaction network, plants with the highest degree were distinct between the seasons. The number of possible interactions was higher in the dry season compared to the wet season and connectance was similar; nestedness however varied between the seasons. The composition of plant and bees species was distinct between the seasons, as well as the interactions between them, mainly due to the alteration in the composition of the plant species and the change in the choice of the bees for the floral resources between the seasons.

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Network of Bee-plant Interactions and Recognition of Key Species in Semideciduous Forest

Sociobiology ◽

10.13102/sociobiology.v62i4.610 ◽

2015 ◽

Vol 62 (4) ◽

Cited By ~ 4

Author(s):

Isabel Farias Aidar ◽

Bruno Ferreira Bartelli ◽

Fernanda Helena Nogueira-Ferreira

Keyword(s):

Plant Interactions ◽

Semideciduous Forest ◽

Key Species ◽

Bee Plant

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Desynchronizations in bee–plant interactions cause severe fitness losses in solitary bees

Journal of Animal Ecology ◽

10.1111/1365-2656.12694 ◽

2017 ◽

Vol 87 (1) ◽

pp. 139-149 ◽

Cited By ~ 33

Author(s):

Mariela Schenk ◽

Jochen Krauss ◽

Andrea Holzschuh

Keyword(s):

Solitary Bees ◽

Plant Interactions ◽

Bee Plant

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Aphids on cabbage: tritrophic and selective insecticide interactions

Bulletin of Entomological Research ◽

10.1017/s0007485300025967 ◽

1998 ◽

Vol 88 (3) ◽

pp. 343-349 ◽

Cited By ~ 10

Author(s):

R.H.J. Verkerk ◽

K.R. Neugebauer ◽

P.R. Ellis ◽

D.J. Wright

Keyword(s):

Host Plant ◽

Gall Midge ◽

Separate Experiment ◽

Host Plant Selection ◽

Seed Kernel ◽

Plant Interactions ◽

Neem Extract ◽

Larva Feeding ◽

Selective Insecticides ◽

Aphid Host

AbstractLaboratory-based experiments are presented involving two aphid sepcies (Myzus persicae Sulzer, a generalist and Brevicoryne brassicae Linnaeus, a crucifer specialist), and the predatory gall midge, Aphidoletes aphidimyza Rondani, on three cultivars of common cabbage Brassica oleracea var. capitata cv. Derby Day (green-leaved), Minicole (green-leaved) and Ruby Ball (red-leaved). In a laboratory-based tritrophic system including both species of aphid, the three cabbage cultivars and A. aphidimyza, predator both species of aphid, the three feeding on M. persicae or B. brassicae on cv. Derby Day, while growth was slowest separate experiment, A. asphidimyza larva feeding on B. brassicae on each of the three cultivars were significantly smaller and consumed less aphid fresh weight when maintained outdoors (mean temperature = 13.5°C) compared with a constant environment room (20°C). However, in this latter experiment under neither regime were differeneces in predator growth or consumption significant between cultivars. Effects of selective insecticides (pirimicarb and a neem seed kernel extract, NeemAzal-T/SR) on bitrophic (aphid-host plant) interactions were also investigated in the laboratory. A pirimicarb dose equating to c. 15% of the recommended field concentration caused equivalent toxicity of M. persicae on cv. Minicole compared with aphids treated with a three-fold greater dose and reared on cv. Derby Day. Cultivar-mediated differences in aphid mortality caused by the neem extract when tested for systemic and translaminar activity were not apparent. The results are discussed in relation to ways in which host plant selection, selective insecticides and biological control could potentially be manipulated and optimized in aphid management system on brassica crops.

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Oregon Bee Atlas: native bee findings from 2018

CATALOG OREGON STATE ARTHROPOD COLLECTION ◽

10.5399/osu/cat_osac.5.1.4647 ◽

2021 ◽

Vol 5 (1) ◽

Author(s):

Lincoln Best ◽

Christopher J Marshall ◽

Cody Feuerborn ◽

Sarah Kincaid ◽

Andony Melathopoulos ◽

...

Keyword(s):

Host Plant ◽

State Level ◽

Flowering Plant ◽

Proof Of Concept ◽

Plant Interactions ◽

Plant Host ◽

Species Of Conservation Concern ◽

Native Bee ◽

Conservation Concern ◽

Occurrence Records

The Oregon Bee Atlas is a new volunteer-led effort to characterize the bee fauna of Oregon State by collecting, preparing, and databasing native bee species and capturing plant host records. In 2018, volunteers collected 11,044 bee specimens across 33 Oregon counties, representing 179 unique bee species, and 32 unique bee genera. Specimens were collected from a total of 310 unique flowering plant genera, resulting in one of the largest state-level databases of bee-host plant interactions. Volunteers produced valuable occurrence records for species poorly known for the State, and species of conservation concern. The 2018 efforts constitute a proof-of-concept of a specimen-focused volunteer native bee survey.

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