Strawberry Cultivars and Mycorrhizal Inoculants Evaluated in California Organic Production Fields
2005
Bull, Carolee T. | Muramoto, Joji | Koike, Steven T. | Leap, Jim | Shennan, Carol | Goldman, Polly
Thirteen commercial strawberry cultivars were evaluated in side-by-side comparisons in five experiments in organic strawberry production fields in central California. Seven cultivars were common to all five experiments; six additional cultivars were included in one to four of the experiments. Of the seven cultivars that were evaluated in all five experiments, the largest market yield was consistently obtained from Aromas, Seascape, or Pacific. Preliminary analyses detected a strong positive correlation between total fruit yield and the nitrogen status of plants, suggesting characteristics in nitrogen uptake and metabolism may be a significant factor in determining yield of commercial strawberry cultivars tested in organic fields. None of the seven commercially prepared mycorrhizal inoculants tested resulted in an increased marketable fruit yield in organic or non-fumigated fields. However, the effects of the treatments on mycorrhizal colonization and total yield varied among experiments. For example, in one of six experiments, a commercial inoculant increased total yield over the nontreated control but did not influence marketable fruit yield.
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