Reduction in common milkweed (Asclepias syriaca) occurrence in Iowa cropland from 1999 to 2009

Hartzler, Robert G.

doi:10.1016/j.cropro.2010.07.018

Cited by 99 publications

(103 citation statements)

References 11 publications

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“…Management measures were not implemented. Hartzler (2010) recorded that application of glyphosphate contributed to the decline in common milkweed in agricultural fields.…”

Section: Spread Of Asclepias Syriaca In the District Of Veľký Krtíšmentioning

confidence: 99%

Mapping of alien species of Asclepias syriaca and Fallopia japonica populations in the agricultural landscape

Pauková¹,

Knápeková²,

Hauptvogl³

2014

JCEA

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In recent years, Asclepias syriaca, a invasive neophyte, has spread aggressively in intensively farmed agricultural landscape in the Central Slovakia. In 2011, it had colonized the area of 100 654 m 2 in abandonment vineyards and permanent grasslands in the district of Veľký Krtíš (South Slovakia). We found the infiltration of these plants into the stands of Triticum aestivum and Helianthus annuus. No management measures were taken. In contrast, the second studied invasive plant Fallopia japonica had occupied area lower by 93 % (7276 m 2 ), but spread across higher number of sites (19) on the banks of the brooks and along the roads. Regulated populations accounted for only 11% of the total area occupied by F. japonica. Low correlation dependence was found between the size of the area and population density of A. syriaca (r = 0.50) and F. japonica (r = 0.56). . Šírenie druhu sme zaznamenali pozdĺž cestných komunikácií (59,8 %) a pozdĺž obidvoch brehov potoka Krtíš (40,2 %). Regulované populácie tvorili iba 11 % z celkovej plochy obsadenej pohánkovcom japonským. Nízka korelačná závislosť bola zistená medzi plochou a hustotou jedincov A. syriaca (r = 0,50) a F. japonica (r = 0,56). Predpokladáme ďalšie šírenie obidvoch druhov neofytov, najmä prenikanie glejovky americkej do poľných kultúr. Keywords

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“…Management measures were not implemented. Hartzler (2010) recorded that application of glyphosphate contributed to the decline in common milkweed in agricultural fields.…”

Section: Spread Of Asclepias Syriaca In the District Of Veľký Krtíšmentioning

confidence: 99%

Mapping of alien species of Asclepias syriaca and Fallopia japonica populations in the agricultural landscape

Pauková¹,

Knápeková²,

Hauptvogl³

2014

JCEA

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“…Both populations depend on host plants in the genus Asclepias, the milkweeds. These plants are ruderal in nature, and have experienced declines in recent years in some areas, potentially in association with increased herbicide use on agricultural lands (Hartzler 2010;Pleasants and Oberhauser 2012;Zalucki and Lammers 2010). For the overwintering monarchs in Mexico, severe weather and forest degradation are further stressors that compound habitat and host loss on breeding grounds in the USA (Brower et al 2012;Flockhart et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Understanding a migratory species in a changing world: climatic effects and demographic declines in the western monarch revealed by four decades of intensive monitoring

et al. 2016

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“…In Iowa, milkweed was present in 51% of the fields in 1999, but only in 8% a decade later. In addition, even in the fields where still observed, milkweed density was reduced to about 10% of its original value (Hartzler, 2010). In sum, the decline in milkweed amounted to a near-complete elimination in the core of the breeding range of the monarchs (Pleasants, 2015).…”

Section: Case Study 3 the Monarch Butterfly And Landscape Level Effementioning

confidence: 93%

Complex Outcomes from Insect and Weed Control with Transgenic Plants: Ecological Surprises?

Bøhn

Löveï

2017

Front. Environ. Sci.

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Agriculture is fundamental for human survival through food production and is performed in ecosystems that, while simplified, still operate along ecological principles and retain complexity. Agricultural plants are thus part of ecological systems, and interact in complex ways with the surrounding terrestrial, soil, and aquatic habitats. We discuss three case studies that demonstrate how agricultural solutions to pest and weed control, if they overlook important ecological and evolutionary factors, cause "surprises": (i) the fast emergence of resistance against the crop-inserted Bt-toxin in South Africa, (ii) the ecological changes generated by Bt-cotton landscapes in China, and (iii) the decline of the monarch butterfly, Danaus plexippus, in North America. The recognition that we work with complex systems is in itself important, as it should limit the belief in reductionist solutions. Agricultural practices lacking eco-evolutionary understanding result in "surprises" like resistance evolution both in weeds and pest insects, risking the reappearance of the "pesticide treadmill"-with increased use of toxic pesticides as the follow-up. We recommend prioritization of research that counteracts the tendencies of reductionist approaches. These may be beneficial on a short term, but with trade-off costs on a medium-to long-term. Such costs include loss of biodiversity, ecosystem services, long-term soil productivity, pollution, and reduced food quality.

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Reduction in common milkweed (Asclepias syriaca) occurrence in Iowa cropland from 1999 to 2009

Cited by 99 publications

References 11 publications

Mapping of alien species of Asclepias syriaca and Fallopia japonica populations in the agricultural landscape

Mapping of alien species of Asclepias syriaca and Fallopia japonica populations in the agricultural landscape

Understanding a migratory species in a changing world: climatic effects and demographic declines in the western monarch revealed by four decades of intensive monitoring

Complex Outcomes from Insect and Weed Control with Transgenic Plants: Ecological Surprises?

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