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opencc-by-4.0Mar 2020View details →

Figure 1 in Molecular and morphological characterization of the alfalfa cyst nematode, Heterodera medicaginis, from Utah

Figure 1: Photomicrographs of second-stage juveniles (A-F) and vulva cones (G and H) of HeterOdera mediCaginiS. A-B heads; C-D tails; E-F lateral field; G-H cone mounts, G showing the bullae and H showing the underbridge. The scale bar=10 µm.

Figure 3 in Critical period of weed control in an interseeded system of corn and alfalfa

Figure 3. Interseeded alfalfa total dry biomass yield as a percentage of the weed-free control over the critical duration of weedy treatments averaged over corn hybrid (pendulum and upright) for a 2-yr study (2020–2021). Interseeded corn and alfalfa were established in 2019 and 2020,(establishment years),and alfalfa was harvested four times the following season, in 2020 and 2021. In weedy interseeded treatments, weeds emerged with the crop and were then removed at different dates, creating the critical timing of weed removal (green circles). In weed-free interseeded treatments, weeds were added later in the crop, creating the critical weed free period (black triangles). An interseeded untreated and a weed-free check were included within these treatments. The critical period times are based on a 5% acceptable yield loss and are denoted by the dashed vertical lines, averaged over years and effect of corn hybrid; the boxes denote the SE for each of the growing degree–day estimates. Points represent observed mean values; lines represent the fitted models calculated using the DRC package in R (R Core Team 2020).

Figure 2 in Critical period of weed control in an interseeded system of corn and alfalfa

Figure 2. Interseeded alfalfa dry biomass yield for the first cutting as a percentage of the weed-free interseeded corn and alfalfa control over the critical duration of weedy treatments averaged over corn hybrid (pendulum and upright), for a 2-yr study (2020–2021). Interseeded corn and alfalfa were established in 2019 and 2020 (establishment years), and alfalfa was harvested the following season, in 2020 and 2021. In weedy treatments, weeds emerged with the crop and were then removed at different dates, creating the critical timing of weed removal (green circles).In weed-free interseeded treatments,weeds were added later in the crop, creating the critical weed-free period (black triangles). An interseeded untreated and a weed-free check were included within these treatments. The critical period times are based on a 5% acceptable yield loss and are denoted by the dashed vertical lines, averaged over years and effect of corn hybrid; the boxes denote the SE for each of the growing degree–day estimates. Points represent observed mean values; lines represent the fitted models calculated using the DRC package in R (R Core Team 2020).

Figure 1 in Critical period of weed control in an interseeded system of corn and alfalfa

Figure 1. Interseeded corn silage dry biomass yield as a percentage of the weed-free interseeded corn and alfalfa control over the critical duration of weedy treatments with differing leaf architecture, pendulum (black circles) or upright (green triangles), for 2019 (A) and 2020 (B). In weedy treatments, weeds emerged with the crop and were then removed at different dates,creating the critical timing of weed removal (CTWR;dashed line).In weed-free interseeded treatments,weeds were added later in the crop,creating the critical weed-free period (CWFP; solid line). An interseeded untreated and a weed-free check were included within these treatments. The CTWR based on a 5% acceptable yield loss, averaged over hybrids, is denoted by the dashed vertical line (black); the boxes denote the SEs of those estimates. The CWFP estimates are not shown, because they were greater than the harvest date. Points represent observed mean values; lines represent the fitted models calculated using the DRC package in R (R Core Team 2020).

opencc-by-4.0Dec 2011View details →

Fig. 2 in Characterization Of Latvian Alfalfa Medicago Sativa Genetic Resources

Fig. 2. Histograms of flow cytometric analysis for alfalfa leaves: (A) tetraploid plant of accession Skrīveru and (B) diploid plant of accession Dzelmes.

opencc-by-4.0Oct 2015View details →

Figure 2 in Developmental differences of local populations of alfalfa weevil (Hypera postica) (Coleoptera: Curculionidae)

Figure 2. Age vs. immature stage survival rates of Iranian population of Hypera postica (Hamedan, Karaj, Tuyserkan, Jovein).

opencc-by-4.0Jun 2021View details →

Raw Data: Breeding alfalfa (Medicago sativa L.) in mixture with grasses

Meta information and full raw data that was used for publication "Breeding alfalfa (Medicago sativa L.) in mixture with grasses" Experiment conducted at Agroscope, Reckenholzstrasse 191, 8046 Zürich, Switzerland Author: Christoph Grieder

Figure 1 in Alfalfa responses to drought, salinity, and herbivory by Tetranychus urticae (Acari: Tetranychidae) and performance of the pest on water-stressed plants

Figure 1. Effects of drought stress on proline content of alfalfa plants before and after Tetranychus urticae feeding. Within each column mean (± SE) followed by the same letter(s) are not significantly different. Capital letters show the effect of drought.

Figure 2 in Alfalfa responses to drought, salinity, and herbivory by Tetranychus urticae (Acari: Tetranychidae) and performance of the pest on water-stressed plants

Figure 2. Effects of salinity stress on proline content of alfalfa plants before and after Tetranychus urticae feeding. Within each column mean (± SE) followed by the same letter(s) are not significantly different. Capital letters show the effect of salinity.

publicJan 2024View details →

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Data from: Measuring motivation for alfalfa hay in feedlot cattle using voluntary interaction with an aversive stimulus

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Data from: Effects of temperature on metabolic rate during metamorphosis in the alfalfa leafcutting bee

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publicFeb 2025View details →

dryad40/100

Carbon-sink potential of continuous alfalfa agriculture lowered by short-term nitrous oxide emission events

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publicMar 2023View details →

opencc-zeroMar 2021View details →

Caterpillars on a phytochemical landscape: the case of alfalfa and the Melissa blue butterfly

Modern metabolomic approaches that generate more comprehensive phytochemical profiles than were previously available are providing new opportunities for understanding plant-animal interactions. Specifically, we can characterize the phytochemical landscape by asking how a larger number of individual compounds affect herbivores and how compounds covary among plants. Here we use the recent colonization of alfalfa (Medicago sativa) by the Melissa blue butterfly (Lycaeides melissa) to quantify plant metabolites and the performance of caterpillars as affected by both individual compounds and suites of covarying phytochemicals. We find that survival, development time and adult weight are all associated with variation in nutrition and toxicity, including biomolecules associated with plant cell function as well as putative anti-herbivore action. The plant-insect interface is complex, with clusters of covarying compounds in many cases encompassing divergent effects on different aspects of caterpillar performance. Individual compounds with the strongest associations are largely specialized metabolites, including alkaloids, phenolic glycosides and saponins. The saponins are represented in our data by more than 25 individual compounds with beneficial and detrimental effects on L. melissa caterpillars, which highlights the value of metabolomic data as opposed to approaches that rely on total concentrations within broad defensive classes.

opencc-zeroDec 2017View details →

Data from: Phenotypic integration in an extended phenotype: among‐individual variation in nest‐building traits of the alfalfa leafcutting bee (Megachile rotundata)

Structures such as nests and burrows are an essential component of many organisms' life-cycle and requires a complex sequence of behaviors. Because behaviors can vary consistently among individuals and be correlated with one another, we hypothesized that these structures would 1) show evidence of among-individual variation, 2) be organized into distinct functional modules, and 3) show evidence of trade-offs among functional modules due to limits on energy budgets. We tested these hypotheses using the alfalfa leafcutting bee, Megachile rotundata, a solitary bee and important crop pollinator. M. rotundata constructs complex nests by gathering leaf materials to form a linear series of cells in pre-existing cavities. In this study, we examined variation in the following nest construction traits: reproduction (number of cells per nest and nest length), nest protection (cap length and number of leaves per cap), cell construction (cell size and number of leaves per cell), and cell provisioning (cell mass) from 60 nests. We found a general decline in investment in cell construction and provisioning with each new cell built. In addition, we found evidence for both repeatability and plasticity in cell provisioning with little evidence for trade-offs among traits. Instead, most traits were positively, albeit weakly, correlated (r ~ 0.15), and traits were loosely organized into covarying modules. Our results show that individual differences in nest construction are detectable at a level similar to that of other behavioral traits and that these traits are only weakly integrated. This suggests that nest components are capable of independent evolutionary trajectories.

opencc-zeroFeb 2024View details →

A public mid-density genotyping platform for alfalfa (Medicago sativa L.)

Small public breeding programs have many barriers to adopting technology, particularly creating, and using genetic marker panels for genomic-based decisions in selection. Here we report the creation of a DArTag panel of 3,000 loci distributed across the alfalfa genome for use in molecular breeding and genomic prediction. The creation of this marker panel brings cost-effective and rapid genotyping capabilities to public breeding programs. The open access provided by this platform will allow genetic data sets generated on the marker panel to be compared and joined across projects, institutions, and countries. This genotyping resource has the power to bring genotyping equity to breeders in alfalfa. This is the first installment of a series of papers on creating affordable public genotyping resources for underserved agricultural plant and animal species.

opencc-zeroJul 2022View details →

Effects of temperature and wildflowers on survival and macronutrient stores of the alfalfa leafcutting bee under extended cold storage

Megachile rotundata (F.) is an important pollinator of alfalfa in the United States. Enhancing landscapes with wildflowers is a primary strategy for conserving pollinators and may improve sustainability of M. rotundata. Changing cold storage temperatures from a traditionally static thermal regime (STR) to a fluctuating thermal regime (FTR) improves overwintering success and extends M. rotundata's shelf life and pollination window. Whether floral resources enhance overwintering survival and/or interact with thermal regime are unknown. With these data sets we tested the combined effects of enhancing alfalfa fields with wildflowers and thermal regime on survival and macronutrient stores under extended cold storage (i.e., beyond one season). Megachile rotundata adults were released in alfalfa plots with and without wildflower strips summer 2017. Completed nests were harvested in September 2017 and stored in STR. After a year, cells were randomly assigned to remain in STR for 6 months or in FTR for a year of extended cold storage; emergence rates were observed monthly. Macronutrient levels (i.e., sugars, glycogen, trehalose and total lipids) of newly emerged females were assessed.