Wettable sulphur and lime sulphur as winter fungicidal sprays on citrus

Kiely, T.

Rural Newsletter 62: 33


Accession: 000576514

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In 4-year trials with Washington Navel orange trees, the effects were compared of wettable sulphur and lime sulphur at 4 and 7 lb/100 gal, respectively, applied either in mid-July or as dormancy was breaking at end-August, and Bordeaux mixture applied at petal-fall and several weeks later. In years in which fruit infection with melanose [Diaporthe citri] was severe, sulphur applications in winter were ineffective. In a year of light infection, however, a sulphur application in late winter, either alone or followed by Bordeaux mixture applications in the spring, gave good control.