Surfactants affect herbicides on kochia (Kochia scoparia) and Russian thistle (Salsola iberica)

Harbour, J. D.; Ramsdale, Bradford K.

doi:10.1614/0043-1745(2003)051[0430:sahokk]2.0.co;2

Cited by 24 publications

(29 citation statements)

References 17 publications

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“…Several studies have reported reduced efficacy of POST herbicides as weed height increases (Waite et al 2013). In this study, a sharp decline in the efficacy of fluthiacetmethyl plus mesotrione for controlling 20-cm-tall glyphosate-resistant kochia was observed, which might be due to morphological or physiological adaptations such as narrow, hairy, and waxy leaves (Harbour et al 2003). The pubescence of kochia leaves and crystalline epicuticular wax interrupts the herbicide droplets above the cuticle and prevents contact with epicuticular surface for absorption into plant-system (de Ruiter et al 1990; Wirth et al 1991).…”

Section: Kochiamentioning

confidence: 58%

Response of selected glyphosate-resistant broadleaved weeds to premix of fluthiacet-methyl and mesotrione (Solstice™) applied at two growth stages

2015

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. 2015. Response of selected glyphosate-resistant broadleaved weeds to premix of fluthiacet-methyl and mesotrione (Solstice TM ) applied at two growth stages. Can. J. Plant Sci. 95: 861Á869. A premix of fluthiacet-methyl and mesotrione (1:17.5 ratio) has recently been registered for post-emergence (POST) broadleaf weed control in corn. The objective of this study was to determine the response of glyphosate-resistant common waterhemp, giant ragweed, and kochia to a premix of fluthiacet-methyl and mesotrione when applied to 10-and 20-cm-tall plants.Greenhouse dose response studies were conducted and log-logistic models were used to determine how the response varies between the weed species at two growth stages under various rates ranging from 21.8 to 218.5 g a.i. ha(1 (0.25 ) to 2.5 )). The effective rate required to achieve90% control and shoot biomass reduction varied depending on the weed species and growth stage. The rates required for 90% control (ED 90 ) of 10-cm-tall glyphosate-resistant common waterhemp, giant ragweed, and kochia were 78, 251, and 17 g a.i. ha(1 , respectively, compared with 144, 489, and 79,349 g a.i. ha (1 , respectively, for 20-cm-tall plants at 21 d after treatment (DAT). Based on visual control estimates at ED 90 level, glyphosate-resistant common waterhemp was the most sensitive at both growth stages; kochia was sensitive at 10-cm height, while giant ragweed was the least sensitive at both growth stages. Irrespective of weed species or growth stage, the ED 90 values calculated on the basis of shoot biomass reduction were mostly higher compared with visual control estimates. It is concluded that premix of fluthiacet-methyl plus mesotrione can be potentially used as a POST herbicide in corn for controlling glyphosate-resistant common waterhemp and kochia ( 510 cm tall) at the labeled rate (87 g a.i. ha(1 ).Key words: Broadleaved weeds, corn, resistance management, weed growth stage Ganie, Z. A., Stratman, G. et Jhala, A. J. 2015. Re´action de certaines dicotyle´dones re´sistantes au glyphosate a`l'application du pre´-me´lange de fluthiacet-me´thyle et de mesotrione (Solstice MC ) a`deux stades de croissance. Can. J. Plant Sci. 95: 861Á869. Un pre´-me´lange de fluthiacet-me´thyle et de mesotrione (proportions 1:17,5) a re´cemment e´te´homologue´comme herbicide de post-leve´e pour lutter contre les dicotyle´dones dans les cultures de maı¨s. La pre´sente e´tude devait e´tablir la re´action de l'amaranthe rugueuse, de la grande herbe a`poux et de la kochie re´sistantes au glyphosate a`l'application de l'herbicide aux plantules de 10 et de 20 cm. Des essais sur la re´action a`ces applications ont e´te´re´alise´es en serre, puis les auteurs ont recouru a`un mode`le logarithmique-logistique pour ve´rifier la variation de cette re´action entre les espe`ces de mauvaise herbe, aux deux stades de croissance, a`un taux d'application allant de 21,8 a`218,5 g de matie`re active par hectare (de 0,25 ) a`2,5 )). Le taux efficace pour atteindre une lutte de plus de 90 % et une re´duction de la biomasse...

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Section: Kochiamentioning

confidence: 58%

Response of selected glyphosate-resistant broadleaved weeds to premix of fluthiacet-methyl and mesotrione (Solstice™) applied at two growth stages

2015

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“…Leaves have a crystalline epicuticular wax structure similar to that of kochia, which was suggested as a possible reason for the similar herbicide absorption between species (Harbour et al 2003).…”

Section: Response To Herbicides and Other Chemicalsmentioning

confidence: 98%

The biology of Canadian weeds. 65. Salsola tragus L. (updated)

Beckie¹,

Francis²

2009

Can. J. Plant Sci.

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775Á789. This account updates that published by Crompton and Bassett in 1985 (classified then as Salsola pestifer A. Nels.). The taxonomy of this species has been controversial and confusing. Salsola tragus is an annual broadleaf weed species native to Eurasia and inadvertently introduced to the Americas in crop seed in 1873. This naturalized species is a common and economically important weed in crop production systems and non-cropped disturbed areas in semiarid to arid regions of western North America; in eastern North America, S. tragus commonly occurs along roadsides, railways, and other dry, stony, and sandy areas. Pollen-mediated gene flow and efficient seed dispersal aids both short-and longdistance spread. As a C 4 species, S. tragus is highly competitive in semiarid and arid small-grain cropping systems because of its ability to emerge early, efficiently extract soil available water by its extensive root system, and tolerate heat, drought, and salinity. Moreover, the evolution of acetolactate synthase-inhibitor resistance has impacted herbicidal control of the species. The weed has been used as an emergency forage during drought, and is palatable when immature and non-toxic to livestock.

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“…Leaves are generally pubescent with crystalline epicuticular wax, which may result in suspended herbicide spray droplets above the cuticle and, consequently, reduced absorption (Harbour et al 2003). Kochia growth stage and herbicide dose also markedly affect herbicide efficacy.…”

Section: Response To Herbicides and Other Chemicalsmentioning

confidence: 99%

The biology of Canadian weeds. 138. Kochia scoparia (L.) Schrad.

Friesen¹,

Beckie²,

Warwick³

et al. 2009

Can. J. Plant Sci.

109

164

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Kochia [Kochia scoparia (L.) Schrad.] is an annual broadleaf weed species native to Eurasia and introduced as an ornamental to the Americas by immigrants in the mid- to late 1800s. Although sometimes categorized in the genus Bassia, there is no compelling reason for this classification. This naturalized species is a common and economically important weed in crop production systems and ruderal areas in semiarid to arid regions of North America, and has expanded northward in the Canadian Prairies during the past 30 yr. Although primarily self-pollinated, substantial pollen-mediated gene flow and efficient seed dispersal aids both short- and long-distance spread. The weed is morphologically highly variable, and its growth and development are markedly affected by environmental conditions. Kochia, a C4 species, is highly competitive in cropping systems because of its ability to germinate at low soil temperatures and emerge early, grow rapidly, tolerate heat, drought and salinity, and exert allelopathic effects on neighboring species. Moreover, herbicidal control has been compromised to some extent by the widespread evolution of herbicide resistance in the species. Kochia is used as a forage, is palatable to livestock with nutritional value similar to that of alfalfa (Medicago sativa), but can be toxic if it comprises the majority of the diet. Although kochia pollen is an allergen, the seed is a source of phytochemicals including mosquito pheromones and saponins that are potentially beneficial to human health; kochia also is beneficial in phytoremediation of soils contaminated by hydrocarbons or pesticides. Key words: Kochia, Kochia scoparia, Bassia scoparia, herbicide resistance, soil salinity tolerance, weed biology

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Surfactants affect herbicides on kochia (Kochia scoparia) and Russian thistle (Salsola iberica)

Cited by 24 publications

References 17 publications

Response of selected glyphosate-resistant broadleaved weeds to premix of fluthiacet-methyl and mesotrione (Solstice™) applied at two growth stages

Response of selected glyphosate-resistant broadleaved weeds to premix of fluthiacet-methyl and mesotrione (Solstice™) applied at two growth stages

The biology of Canadian weeds. 65. Salsola tragus L. (updated)

The biology of Canadian weeds. 138. Kochia scoparia (L.) Schrad.

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