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ISHS Acta Horticulturae 708: V International Strawberry Symposium

ETHANEDINITRILE (C2N2) - A NOVEL SOIL FUMIGANT FOR STRAWBERRY PRODUCTION

Authors:   S.W. Mattner, R.K. Gounder, R.C. Mann, I.J. Porter, J.N. Matthiessen, Y.L. Ren, M. Sarwar
Keywords:   Fragaria × ananassa, soil disinfestation, methyl bromide
Abstract:
For the first time, ethanedinitrile (C2N2, EDN) was examined as an alternative to the ozone-degrading fumigant, methyl bromide (MB), for soil disinfestation in the nursery production of strawberries (Fragaria ×ananassa). In microplot studies, EDN killed buried inoculum of several soil-borne pathogens of strawberry (Pythium ulti-mum, Phytophthora cactorum, Fusarium oxysporum, Rhizoctonia fragariae and Rhizoctonia solani) and reduced natural populations of plant-parasitic nematodes (Tylenchus and Helicotylenchus spp.) to levels equivalent to MB. EDN was most effi-cacious when it was injected at depth into soil (20 cm) and sealed with low-density polyethylene. In field trials, EDN reduced the emergence of weeds (Poa annua, Spregula arvensis, Agrostis tenuis and Raphanus raphanistrum) by 98%, and in-creased strawberry runner yields by 135%, which was equivalent to MB. Although trials are continuing, these preliminary results demonstrate a strong potential for EDN as an alternative to MB for strawberry production.
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