Effects of 2,4-D and related substances on fruit-drop, yield, size, and quality of grapefruit

W. S. Stewar and E. R. Parker

Hilgardia, 1954, vol. 22, issue 18

Abstract: From 1947 to 1950, 34 field experiments were conducted to study the effects of applications of 2,4-D and related substances on fruit-drop, yield, size, and quality of grapefruit in California. It was found that water sprays of 8 ppm 2,4-D reduced mature fruit-drop an average of 44 per cent, as compared with nonsprayed trees, and that this response to 2,4-D occurred under a wide range of climatic and environmental conditions. This spray was more effective in reducing fruit-drop when applied in May than when applied in July, and annual applications of 2,4-D for three years have shown no accumulative detrimental effects. The differences in fruit-drop resulting from the use of various forms of 2,4-D were not great.

Keywords: Crop; Production/Industries (search for similar items in EconPapers)
Date: 1954
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