Pod sealant and canola harvest methods for pod shattering mitigation

摘要

In this study, canola harvest methods that are sometimes associated with pod sealant were evaluated to mitigate pod shattering. The following six harvest methods were evaluated at four locations in the presence or absence of a pod sealant: a) untreated direct harvesting; b) swathing; c) diquat + direct harvesting (DH); d) glufosinate + DH; e) paraquat + DH and f) paraquat + diuron + DH. The analysis of variance showed significant interactions at the four locations between the presence and absence of the pod sealant and the harvest methods (P ≤ 0.01). When harvesting was performed at the ideal time, the windrowing and direct harvest methods resulted in higher yields. In this case, the use of pre-harvested herbicides and pod sealant were not necessary to mitigate pod shattering. However, when harvesting was performed later, pre-harvest desiccation with diquat or paraquat resulted in the best yields. Thus, the use of pod sealant was the most effective method. The windrowing method should not be used at an inappropriate time because it can result in seed shattering when plants are drying in the field.