A comparison of lime sulphur and flotation sulphur spray on apple trees

Christopher, E. 0.

Proceedings of the American Society for Horticultural Science 40: 63-67


ISSN/ISBN: 0099-4065
Accession: 013286490

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A comparison of liquid lime sulfur, 2 gallons to 100 gallons and flotation sulfur paste (Camden), 10 lbs. to 100 gal., on individual leaves, young and mature apple trees, indicates the marked superiority of the latter material. Lime sulfur resulted in a greater reduction of CO2 assimilation, less stored starch, more visible leaf injury, less tree growth and a smaller yield. Field results supported the laboratory results secured by gas analysis methods. Disease control was sufficiently good with the weaker fungicides so that it is generally recommended to replace lime sulfur in all except the most extreme cases of apple scab infection.