Methods and compositions to defoliate crop plants and...

A - Human Necessities – 01 – N

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A01N 61/00 (2006.01) A01N 37/46 (2006.01) A01N 47/34 (2006.01) A01N 47/36 (2006.01) A01N 57/12 (2006.01) A01N 57/20 (2006.01)

Patent

CA 2394238

Concurrent or sequential application of an auxin transport inhibitor and a defoliating agent synergistically improve defoliation of crop plants and minimize crop plant regrowth. Preferably, the auxin transport inhibitor is a semicarbazone compound. The defoliating agent may be an ethylene response or ethylene-type response agent such as a phosphonic acid derivative. Most preferably, the semicarbazone compound is diflufenzopyr and the phosphonic acid derivative is ethephon (e.e., ethephon (2-chloroethyl) phosphonic acid).

L'invention concerne une application séquentielle ou concurrente d'un inhibiteur de transport d'auxine et un agent défoliant améliorant de façon synergétique la défoliation des plantes cultivées et diminuant la repousse de celles-ci. L'inhibiteur de transport d'auxine est, de préférence, un composé semicarbazone. L'agent défoliant peut être un agent de réponse d'éthylène ou un agent de réponse de type éthylène tel qu'un dérivé d'acide phosphonique. Mieux encore, le composé semicarbazone est un diflufenzopyr et le dérivé d'acide phosphonique un éthéphon (à savoir, un acide phosphonique éthéphon (2-chloroéthyle)).

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