Relationship between Herbicide Movement and Stump Sprouting

Leonard, O. A.; Murphy, Aurora

doi:10.2307/4041090

Cited by 7 publications

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“…Herbicide activity and movement were markedly affected by the water status of the cuttings (Tables 6,7,8). There appears to be little published information which is relevant to these results but Leonard & Murphy (1965) have shown that the effects of stump treatments with 2,4-D or 2,4,5-T amine are reduced by shielding the cut surfaces from rain, and Ivens (1972) in studies which complement the present experiments, has found that when picloram or 2,4,5-T are applied to the cut ends oi Populus stems, application of water greatly increases herbicide movement. These results suggest that cut-bark treatment should not be applied during very dry weather, when the aerial parts of woody plants have low moisture content.…”

Section: Discussionmentioning

confidence: 56%

LABORATORY EXPERIMENTS ON ‘CUT BARK’ TREATMENTS WITH HERBICIDES, USING CUTTINGS OF POPULUS EURO AMERICAN A‘I‐78′

Turner

1973

Weed Research

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A laboratory method is described for studying the effects of introducing herbicides into the vascular tissues oi Populus cuttings. Of sixteen herbicides tested in this way, MCPA and picloram were the most phytotoxic. Ester formulations of growth regulator herbicides were less active than water soluble amine or inorganic salts. The phytotoxic effects of the latter were increased by supplying water to the cuttings before or after treatment or by applying the herbicide in a relatively large volume of water. A non-ionic surfactant did not increase the effects of injected MCPA salt, approximately similar amounts of which moved both upwards and downwards in cuttings from the point of introduction.Experiences en laboratoire sur des boutures de Populus X euroamericana "1-78" traitds avec des herbicideŝ . Une methode de laboratoire a i,tt ^labor^e pour ^tudier les efFets de l'introduction d'herbicides dans les tissus vasculaires de boutures de Populus. Des seize herbicides essayfe de cette fagon, le MCPA et le piclorame ont ^t^ les plus phytotoxiques. Les formulations des substances de croissance herbicides sous forme d'esters furent moins actives que les sels d'amines hydro-solubles ou que les sels min^raux. Les effets phytotoxiques de ces derniers furent accrus en fournissant de I'eau aux boutures, avant ou apres le traitement, ou en appliquant l'herbicide dans une quantity d'eau relativement importante. Un agent de surface non ionique n'accrut pas les effets du sel de MCPA inject^, lequel migra, dans les boutures, en quantit& approximativement ^gales vers le haut et vers le bas k partir du point d'introduction.Laborversuche zur "cut-bark"-Behandlung mit Herbiziden an Stecklingen von Populus x euroamericana "7-78" Zusammenfassung. Es wird eine Labormethode zur Untersuchung der Wirkung von Herbiziden bei Einfuhning in das Leitgewebe von Po/)K/u.s-Stecklingen beschrieben. Von sechszehn auf diese Weise getesteten Herbiziden erwiesen sich MCPA und Picloram als am starksten phytotoxisch. Esterformulierungen von Wuchsstoffherbiziden waren weniger aktiv als die wasserloslichen Amin-oder anorganischen Salzformulierungen. Die Phytotoxizitat der letzteren liess sich durch eine Wassergabe vor oder nach der Behandlung oder auch durch Anwendungd es Herbizids in einem verhaltnismassig grossen Wasservolumen steigem. Ein nichtionisches Netzmittel verstarkte den Effekt injizierten MCPA-Salzes nicht, von dem etwa gleiche Mengen in den Stecklingen vom Ort der Applikation aus nach oben wie auch nach unten transportiert wurden.

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Section: Discussionmentioning

confidence: 56%

LABORATORY EXPERIMENTS ON ‘CUT BARK’ TREATMENTS WITH HERBICIDES, USING CUTTINGS OF POPULUS EURO AMERICAN A‘I‐78′

Turner

1973

Weed Research

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“…The absence of roots in the experimental material may, therefore, not be of major significance in relating the results of the present work to tree stumps in the field. The flnding of Leonard & Murphy (1965) that rain falling on Quercus stumps increased the movement of 2,4-p and 2,4,5-T amines provides evidence that at least some of the same factors are operating in the two cases.…”

Section: Discussionmentioning

confidence: 94%

“…A mixture of picloram and 2,4-D amines applied to Acacia drepanolobium Sjostedt, for example, has sometimes produced high kills, while at other times similar treatment has been quite ineffective (Ivens, 1970). The reasons for this variability are not clear, but Leonard & Murphy (1965) found that stumps of Quercus spp. showed less response to 2,4-D or 2,4,5-T amines when the surface was covered with aluminium foil after treatment to prevent penetration ofrainwater.…”

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confidence: 99%

Movement of Herbicide Applied to Cut Ends of Populus × gelrica Stems

Ivens

1972

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“…O . .NE' of the major problems in the contr~l of woody plants has been the failure to obtaIn resprout control following foliar applications (7,10,13). Treatments applied to foliage often provide control over the existing shoot but permit vigorous resprouts to .develop from the root collar zone, thereby making the treatment relatively ineffective.…”

Section: Introductionmentioning

confidence: 99%

Woody Plant Shoot Management and Response to Herbicidal Treatment

1969

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Shoots of naturally established, foliated red maple (Acer rubrumL.) and persimmon (Diospyros virginianaL.) growing in North Carolina were treated with 2,4-dichlorophenoxyacetic acid (2,4-D) or 2,4,5-trichlorophenoxyacetic acid (2,4,5-T) formulations following various shoot management procedures. Shoot management prior to treatment consisted of decapitating or not decapitating shoots at 2 inches above the ground line in May when the plants were 3 to 6 ft high. Herbicidal applications were made to uncut shoots and to resprouts of previously cut shoots at 30 and 60 days after decapitation. Responses measured 10, 14, and 22 months after treatment were percent control or original shoots, percent control of new shoots, shoot height, number of live stems/plant. The original shoot and new shoot values were averaged to provide a total shoot control index. Spraying of previously cut shoots at 30 or 60 days after cutting was more effective than spraying of uncut shoots except for 2,4,5-T applied to persimmon. The average total shoot control index for 2,4-D treated red maple, considering all rates, application dates, and evaluation dates was 82% for previously cut shoots and 56% for uncut shoots while the corresponding heights were 0.9 and 4.2 ft, respectively. For 2,4,5-T-treated red maple, the total shoot control indices were 92% and 78% for previously cut and uncut shoots, respectively, while the corresponding heights were 0.4 and 1.4 ft. For persimmon, there was a net advantage for treating previously cut shoots with 2,4-D, but the reverse was true for 2,4,5-T. The results are consistent with the theoretical behavior of 2,4-D and 2,4,5-T in woody plants outlined as a basis for conducting the study. Alternate explanations of results are proposed and practical implications described.

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Relationship between Herbicide Movement and Stump Sprouting

Cited by 7 publications

References 0 publications

LABORATORY EXPERIMENTS ON ‘CUT BARK’ TREATMENTS WITH HERBICIDES, USING CUTTINGS OF POPULUS EURO AMERICAN A‘I‐78′

LABORATORY EXPERIMENTS ON ‘CUT BARK’ TREATMENTS WITH HERBICIDES, USING CUTTINGS OF POPULUS EURO AMERICAN A‘I‐78′

Movement of Herbicide Applied to Cut Ends of Populus × gelrica Stems

Woody Plant Shoot Management and Response to Herbicidal Treatment

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