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Thesis (M.S.)—University of Nebraska—Lincoln, 1970. Department of Agronomy.


Copyright 1970, the author. Used by permission.


Much of the non-irrigated corn grown in Nebraska and surrounding states is frequently subjected to moisture stress. Moisture stress on corn during the vegetative stage of growth indirectly affects grain yield by reducing plant height and photosynthetic area. During the reproductive stage of growth, moisture stress directly affects corn grain yield by preventing fertilization and/or kernel development.

Field studies were conducted at Lincoln, Nebraska in 1968 and Mead, Nebraska, in 1969 to determine the effects of propanil (3,4-dichloropropionanilide) as an antitranspirant on corn (Zea mays, L.). Non-irrigated and irrigated moisture regimes were used during 1968. Propanil was applied three weeks before, one week before, and at ear emergence at rates of 0, 1.68, and 3.36 kg/ha. In 1969, non-irrigated, pre-season irrigated, and irrigated moisture regimes were used. During 1969, propanil was applied three weeks before and one week before ear emergence at rates of 0, 0.84, 1.68, and 3.36 kg/ha. Data were collected on the following variables: water use from June 27 to September 3, grain yield, ratio of grain to total dry matter, number of harvestable ears, shelling percentage, total dry matter accumulated by August 5, plant height, anthesis, and ear, silk, and tassel emergence. The objective of the study was to determine if the application of propanil would reduce water use by corn without causing a reduction in grain yield.

Advisor: William L. Colville