Crop Rotation with <i>Tagetes</i> sp. is an Alternative to Chemical Fumigation for Control of Root‐Lesion Nematodes

Reynolds, L. Bruce; Potter, J. W.; Ball-Coelho, B.

doi:10.2134/agronj2000.925957x

Cited by 48 publications

(36 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Field testing has shown that tobacco plants benefited from two years of protection in plots that had grown Tagetes patula (French marigold) or Tagetes erecta (African marigold) cultivars [183]. One of the most active antinematodal agents was identified as α-terthienyl (α-T, 11Ch) [184].…”

Section: Sulfurmentioning

confidence: 99%

Biosynthesis and function of polyacetylenes and allied natural products

Minto

Blacklock

2008

Progress in Lipid Research

291

228

View full text Add to dashboard Cite

Polyacetylenic natural products are a substantial class of often unstable compounds containing a unique carbon-carbon triple bond functionality, that are intriguing for their wide variety of biochemical and ecological functions, economic potential, and surprising mode of biosynthesis. Isotopic tracer experiments between 1960 and 1990 demonstrated that the majority of these compounds are derived from fatty acid and polyketide precursors. During the past decade, research into the metabolism of polyacetylenes has swiftly advanced, driven by the cloning of the first genes responsible for polyacetylene biosynthesis in plants, moss, fungi, and actinomycetes, and the initial characterization of the gene products.The current state of knowledge of the biochemistry and molecular genetics of polyacetylenic secondary metabolic pathways will be presented together with an up-to-date survey of new terrestrial and marine natural products, their known biological activities, and a discussion of their likely metabolic origins.

show abstract

Section: Sulfurmentioning

confidence: 99%

Biosynthesis and function of polyacetylenes and allied natural products

Minto

Blacklock

2008

Progress in Lipid Research

291

228

View full text Add to dashboard Cite

show abstract

“…The data were combined over locations, with replications considered random effects and locations and crops considered as fixed effects, but due to significant location × crop interactions observed for most of the measured characters, mean separations between rotation crop treatments was presented for each location. An exception was made for the dry matter of the rotation crop as Bartlett's test (Snedecor and Cochran 1989) showed homogeneity of error variance among locations and the combined data showed a non-significant location × crop interaction effect. Fisher's protected significant difference (LSD α < 0.05) was used to test treatment means.…”

Section: Discussionmentioning

confidence: 99%

“…In Ontario, the economic threshold for losses to most crops is 1000 P. penetrans kg -1 soil and 50 P. penetrans g -1 dry root. For flue-cured tobacco, the economic threshold level is 500 P. penetrans kg -1 soil (Oltholf et al 1973;Reynolds et al 2000b). Therefore, the locations used were considered to be heavily infested with P. penetrans.…”

Section: Pratylenchus Penetrans Populations During the Rotation Crop mentioning

confidence: 99%

See 1 more Smart Citation

Pearl millet as a rotation crop with flue-cured tobacco for control of root-lesion nematodes in Ontario

Amankwa¹,

White²,

McDowell³

et al. 2006

Can. J. Plant Sci.

View full text Add to dashboard Cite

. 2006. Pearl millet as a rotation crop with flue-cured tobacco for control of root-lesion nematodes in Ontario. Can. J. Plant Sci. 86: 1265-1271. In Ontario, flue-cured tobacco (Nicotiana tabacum L.) growers routinely fumigate their soils to control root-lesion nematodes (Pratylenchus penetrans Cobb). Studies suggest that planting pearl millet (Pennisetum glaucum L.) as a rotation crop may control the nematodes; winter rye (Secale cereale L.), the crop commonly grown in rotation with tobacco, is susceptible to the nematodes. In 2002, plots of forage millet (var. CFPM 101), grain millet (var. CGPMH-1) and winter rye were established at three sites and in 2003, tobacco was grown at these sites in non-fumigated plots where the rotation crops grew, except for a winter rye/fumigation treatment. The goal was to evaluate P. penetrans populations and tobacco yield and quality in the millet rotations relative to the traditional rye-fumigation system. In 2002, initial P. penetrans populations assessed in the spring were similar for all treatments; however, the final populations and consequently the ratios of final populations/initial populations (Pf/Pi) consistently differed among treatments. The Pf/Pi ratios ranged from 0.07 to 0.79 for forage millet, from 0.18 to 0.94 for grain millet and from 2.33 to 21.65 for rye. In 2003, P. penetrans populations in tobacco plots previously cropped to either type of millet were comparable with those detected in fumigated winter rye plots. Compared with tobacco following rye without fumigation, tobacco yield was 14 to 51% higher following rye with fumigation, 19 to 70% higher following forage millet and 18 to 65% higher following grain millet. Grade index was unaffected. Results indicate that pearl millet offers an alternative to fumigants for the suppression of P. penetrans population and provides equivalent gross returns. hiver à trois endroits puis, l'année suivante, ont cultivé du tabac sur les mêmes sites sans fumiger le sol, sauf dans un cas, pour le seigle d'hiver. L'objectif était d'évaluer la population de P. penetrans ainsi que le rendement et la qualité du tabac poussant sur les parcelles où l'on avait cultivé du millet, comparativement à ceux obtenus avec le régime usuel seigle/fumigation. En 2002, la population de P. penetrans initialement évaluée au printemps était similaire pour tous les traitements; cependant, la population finale et le ratio entre la population finale et initiale (Pf/Pi) différaient constamment d'un traitement à l'autre. Le ratio Pf/Pi varie de 0,07 à 0,79 pour le millet fourrager, de 0,10 à 0,94 pour le millet grainier et de 2,33 à 21,65 pour le seigle. En 2003, la population de P. penetrans dans les parcelles de tabac sur lesquelles on avait antérieurement cultivé une ou l'autre sorte de millet était comparable à celle des parcelles de seigle fumigées. Comparativement au rendement obtenu sur les parcelles de seigle non fumigées, le rendement du tabac augmente de 14 à 51 % après fumigation des parcelles de seigle, de 19 à 70 % après la culture du mi...

show abstract

“…In southern Ontario, Canada, T. erecta has been grown as a rotation crop for nematode control in tobacco fields (Reynold et al 2000). Planting T. erecta as an inter-crop between tomato plants has also been found useful in reducing nematode populations, although the efficiency was not as good as that of synthetic nematicide (Vasudevan et al 1997).…”

Section: Case Studies Lutein From Marigoldmentioning

confidence: 99%

Exploration and characterization of bioactive phytochemicals in native Canadian plants for human health

Tsao¹,

Liu²

2007

Can. J. Plant Sci.

View full text Add to dashboard Cite

Tsao, R. and Liu, Z. 2007. Exploration and characterization of bioactive phytochemicals in native Canadian plants for human health. Can. J. Plant Sci. 87: [1045][1046][1047][1048][1049][1050][1051][1052][1053]. The boundary between medicine and food is not always clear in many ancient cultures. Many plants have traditionally been used in both culinary and healing practices. Herbs, in particular, have shown this dual functionality. Scientific information on herbal medicines has been limited to exotic plants, and only a few herbal plants native to, or grown in, Canada, such as American ginseng, Echinacea, St. John's wort and feverfew, have been studied. Thorough investigations have not been carried out, and there is a lack of information about native Canadian plants and their potential as medicinal plants, particularly in terms of their chemical composition, biological activity and potential use for disease prevention. Also, from the marketing point of view, many of the existing herbs have only a small niche in the marketplace, so over production and consequent price depression can easily happen, as seen in the ginseng industry. There is obviously a need for multidisciplinary collaboration among herbalists, botanists, chemists and other scientists, since introducing native plants into mass production requires knowledge of environmental impact, genetic variability and the effects of other factors on the bioactive components. This review is intended to introduce the needs, techniques and challenges of such an approach with an emphasis on chemical and biochemical characterizations. Cette dualité se remarque particulièrement chez les fines herbes. En homéopathie, les données scientifiques se bornent aux espèces exotiques et seules quelques herbacées parmi les plantes indigènes du Canada ont été étudiées, notamment le ginseng américain, l'échinacée, le millepertuis et le chrysanthème-matricaire. Aucune étude exhaustive n'a été entreprise et on manque d'informations sur les plantes indigènes du Canada ainsi que leur potentiel en tant que plantes médicinales. On ne sait notamment pas grand-chose sur leur composition chimique, leur activité biologique ni leur utilité éventuelle pour prévenir la maladie. Du point de vue commercial, bon nombre des fines herbes existantes occupent une très petite niche sur le marché, de sorte qu'il peut y avoir aisément surproduction et chute des prix, ainsi qu'on a pu le voir dans l'industrie du ginseng. Manifestement, les homéopathes, les botanistes, les chimistes et d'autres scientifiques doivent collaborer, car le passage des plantes indigènes à la production de masse exige une solide connaissance des répercussions sur l'environnement, de la variabilité génétique et des effets d'autres paramètres sur les composés bioactifs. Cet article expose les besoins, les techniques et les enjeux d'une telle approche, en insistant sur la caractérisation chimique et biochimique.

show abstract

Crop Rotation with Tagetes sp. is an Alternative to Chemical Fumigation for Control of Root‐Lesion Nematodes

Cited by 48 publications

References 13 publications

Biosynthesis and function of polyacetylenes and allied natural products

Biosynthesis and function of polyacetylenes and allied natural products

Pearl millet as a rotation crop with flue-cured tobacco for control of root-lesion nematodes in Ontario

Exploration and characterization of bioactive phytochemicals in native Canadian plants for human health

Contact Info

Product

Resources

About