Life Cycles and Control Studies of Some Weed Bromegrasses

Finnerty, D. W.; Klingman, Dayton L.

doi:10.2307/4040558

Cited by 47 publications

(52 citation statements)

References 2 publications

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“…This response was more pronounced in populations from foothill and cold desert areas versus those from warm desert areas. Flowering was promoted in vernalized plants when they were exposed to 15 h photoperiods, whereas exposure to 9 to 10 h photoperiod inhibited normal panicle development (Finnerty and Klingman 1962).…”

Section: Emergence In Both Fall and Springmentioning

confidence: 97%

A review of the recruitment biology of winter annual weeds in Canada

Cici¹,

Acker²

2009

Can. J. Plant Sci.

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A review of the recruitment biology of winter annual weeds in Canada. Can. J. Plant Sci. 89: 575Á589. Typically, summer annual weeds have been the primary management target for field crop farmers in Canada, but with changes in cropping systems and with acknowledged global climate change there will be an increasing need to consider the management of species that are present very early in the spring, including winter annual weeds. Knowledge of weed recruitment biology and emergence patterns can be used to guide weed management practices. A review was conducted of the recruitment biology of winter annual weeds in Canada. The key finding was that all of the significant winter annual weeds in Canadian agriculture are facultative, with the majority of species emerging at two peak periods, AprilÁMay and SeptemberÁOctober. For the weed species included in this review, the information available on recruitment and seed biology was far from comprehensive, and for some species there was very little published information, in particular on specific base temperatures for germination, documented field-based emergence periods and data that could be used to create simple predictive population dynamics models, including fecundity () environment), seed longevity and overwintering probability. This is particularly true with respect to information in Canadian agricultural contexts. A number of questions result from this review, a key one being whether spring versus fall emergence creates significant differences in fundamental biological characteristics of winter annual weeds including seed dormancy status, microsite requirements, phenology, plant vigour and competitive ability. Given that none of the winter annuals in Canada are constitutive and given ongoing climate change, farmers in Canada should be careful not to encourage summer annuals to become winter annuals. Movement away from fall weed management, including tillage and repeated sowing of winter annual crops will encourage facultative winter annual behaviour. In addition, farmers should be wary of invasion by populations of persistent winter annuals including stinkweed, chickweed and American dragonhead. Habituellement, quand ils ge`rent leurs cultures, les agriculteurs canadiens prennent surtout pour cible les adventices annuelles d'e´te´. Cependant, l'e´volution des syste`mes agricoles et le changement climatique exigeront qu'on se penche de plus en plus sur les espe`ces pre´sentes tre`s toˆt au printemps, notamment les adventices annuelles d'hiver. Mieux connaıˆtre la biologie du recrutement des mauvaises herbes et la leve´e de ces dernie`res pourrait nous guider dans les me´thodes de lutte. Les auteurs ont passe´en revue ce qu'on sait sur la biologie du recrutement des adventices annuelles d'hiver au Canada. Leur principale constatation est que les grandes adventices annuelles d'hiver canadiennes sont toutes de type facultatif, la majorite´levant durant deux pe´riodes, soit d'avril a`mai et de septembre a`octobre. En ce qui concerne les adventices examine´es dans le cadr...

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Section: Emergence In Both Fall and Springmentioning

confidence: 97%

A review of the recruitment biology of winter annual weeds in Canada

Cici¹,

Acker²

2009

Can. J. Plant Sci.

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“…Therefore methods to reduce cheatgrass densities are necessary. Proposed techniques include herbicides imazapic (Plateau) (Shinn and Thill 2002) and glyphosate (Whitson and Koch 1998), defoliation via livestock grazing (Hulbert 1955, Finnerty and Klingman 1961, Mosley 1996, pathogenic bacteria (Kennedy et al 1991) and fungi (Meyer et al 2001). Although prescribed fire alone is not recommended (Mosley et al 1999), it may be an effective technique worth investigation if applied in combination with a spring glyphosate treatment and conducted either in late spring or autumn.…”

Section: Status and Trends Of Sagebrush Ecosystems 7 -49mentioning

confidence: 99%

Genetic structure of Greater Sage-Grouse (Centrocercus urophasianus) in a declining, peripheral population

et al. 2015

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“…Vernalized plants exposed to 9-or 10-hour days failed to flower, however, exposure to 15-hour days allowed normal panicle development. Imbibed downy brome seeds can be vernalized over winter months (Finnerty and Klingman 1962;Mack and Pyke 1983). Thus, spring recruited downy brome seedlings are capable of flowering and producing seed.…”

Section: Downy Brome Vernalizationmentioning

confidence: 99%

“…Downy brome displays specific daylength and temperature requirements (must be vernalized, i.e., exposed to cold temperatures over winter) to flower normally (Finnerty and Klingman 1962). Continuous exposure to long or short days inhibited flowering.…”

Section: Downy Brome Vernalizationmentioning

confidence: 99%

“…Japanese brome phenology Japanese brome usually germinates in the fall and overwinters in a vegetative growth stage (Anderson et al 1990;Baskin and Baskin 1981;Finnerty and Klingman 1962;Whisenant 1990b). It resumes vigorous vegetative growth in spring and panicles begin to emerge in early May then seeds are ripe by late June or early July (Baskin and Baskin 1981).…”

Section: Life History Downy Brome Phenologymentioning

confidence: 99%

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