Method for inhibiting plant disease

A - Human Necessities – 01 – N

Patent

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Details

A01N 47/28 (2006.01) A01P 21/00 (2006.01) A01N 59/08 (2006.01) A01N 59/20 (2006.01)

Patent

CA 2203770

The present invention is directed to a method of inhibiting the growth of disease organisms on and in plants by directly applying an aqueous solution comprising urea and at least one water-soluble salt of a divalent cation and a monovalent anion to the seeds, stems, bark, leaves, seed heads or sub-surface root zones of said plants. The weight percent ratio of urea to divalent cation in these solutions should be from about 0.25-10.0 to 1Ø Preferred divalent cations include those of the alkaline earth metals and the transition metals. Most preferred are calcium, magnesium, zinc, manganese, copper, iron, cobalt, nickel and mixtures thereof. Preferred anions include nitrate. chloride, bromide and mixtures thereof. In more preferred solutions, the ratio of urea to divalent cation is from about 2.0-7.0 to 1Ø Particularly preferred solutions include calcium chloride as the water-soluble salt. Optionally, a second water-soluble salt of a divalent cation and a monovalent anion may be included.

L'invention concerne un procédé pour inhiber la croissance des organismes de maladies sur et dans les plantes. Ce procédé consiste à applique directement une solution aqueuse contenant de l'urée et au moins un sel soluble à l'eau d'un cation divalent et d'un anion monovalent aux graines, tiges, écorces, feuilles, têtes de graines ou zones des racines enterrées de ces plantes. Le rapport en pourcentage en poids d'urée sur le cation divalent dans ces solutions doit se situer entre 0,25-10,0 et 1,0. Les cations divalents préférés comprennent ceux provenant des métaux terreux alcalins et des métaux transitoires. De préférence, on utilisera du calcium, du magnésium, du zinc, du manganèse, du cuivre, du fer, du cobalt, du nickel et des mélanges de ces derniers. Les anions préférés comprennent du nitrate, du chlorure, du bromure et des mélanges de ces derniers. Dans des solutions encore davantage préférées, on prévoit du chlorure de calcium comme sel soluble à l'eau. Eventuellement, un deuxième sel soluble à l'eau d'un cation divalent et d'un anion monovalent peut être prévu.

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