ISHS Acta Horticulturae 810: IX International Vaccinium Symposium
INTEGRATING CONVENTIONAL AND ALTERNATIVE PRACTICES INTO CRANBERRY WEED MANAGEMENT |
| Author: | H.A. Sandler |
| Keywords: | Vaccinium macrocarpon, pruning, norflurazon, dodder, moss, vinegar, household cleaners, sulfonylurea, mesotrione |
| Abstract:
Three research projects were conducted to study the interaction of a preemergence herbicide and pruning and to screen various products for weed management in cranberries. In one study, ‘Stevens’ and ‘Howes’, were either pruned in the spring or left untreated. Norflurazon was applied at a range of rates in the spring and fall following the pruning. Injury (‘Stevens’ only) was related to herbicide rate only; timing of application and pruning did not affect injury ratings. Pruning and herbicide rate affected weight per berry and yield for both cultivars. In another study, 20% and 40% solutions of vinegar (5% acetic acid) or a household cleaner were evaluated for control of haircap moss (Polytrichum commune), narrowleaved goldenrod (Euthamia tenuifolia), yellow loosestrife (Lysmachia terrestris), and/or dodder (Cuscuta gronovii). Vinegar gave good to excellent control of moss and did not injure cranberry vines. Four weekly applications of 20% solutions of Simple Green reduced dodder seed germination. No other treatment provided reasonable control of any weed. Lastly, nine herbicides were screened for their potential to control dodder. All herbicides injured dodder when visually compared with the control but no treatment effects were seen for seed number, weight, or viability. Although statistically similar to the untreated control, no seeds were produced when dodder was treated prior to flowering with mesotrione and imazamox. Since mesotrione is expected to be available for use in 2008, additional studies are planned to further investigate its efficacy for dodder control. | |
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