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The Germination Stimulant AC94377 Reduces Seed Survival of Wild Mustard (Sinapis Arvensis)

Published online by Cambridge University Press:  12 June 2017

William W. Donald  and
Fred S. Tanaka
William W. Donald
Affiliation:
U. S. Dep. Agric., Agric. Res. Serv. Biosciences Res. Lab., Fargo, ND 58105
Fred S. Tanaka
Affiliation:
U. S. Dep. Agric., Agric. Res. Serv. Biosciences Res. Lab., Fargo, ND 58105
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Abstract

Annual application of AC-94377 at 3.4 kg ha−1 in the field reduced survival of shallowly buried (1.25 cm deep), undisturbed wild mustard seed compared to untreated check seed in two 4-yr-long trials. By the second fall, greater than twofold more untreated check seed survived as did AC-94377-treated seed. Moreover, no AC-94377-treated seed survived beyond year three following treatment in fall alone or fall plus spring in each of 3 yr. In contrast, 25% of untreated check seed survived into the fall of year four. AC-94377 applied in spring alone, fall alone, or both spring and fall for each of 4 yr progressively reduced seed survival. Seed survival expressed as a percent of the initial number of seed buried was best modeled as a negative exponential function of time in years. In the greenhouse, more wild mustard seed on the soil surface established after AC-94377 treatment at 3.4 kg ha−1 when enclosed in large seed packets (5 by 12 cm), like those used in the field, than when in small seed packets (5 by 6.25 cm), whether or not the packets contained soil. When soil was added to either sized seed packet, fewer seed survived compared to seed not in seed packets or seed in packets without soil. Thus, it is likely that the field seed survival study underestimated effectiveness of AC-94377 to reduce wild mustard seed survival.

Keywords

AC-94377, 1-(3-chlorophthalimido)cyclohexanecarboxamidewild mustard, Sinapis arvensis # SINARGermination stimulationphthalimidesseed persistenceSINAR
Type
Weed Biology and Ecology
Information
Weed Science , Volume 41 , Issue 2 , June 1993 , pp. 185 - 193
Copyright
Copyright © 1993 by the Weed Science Society of America 

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