Effects of Soil-applied Imazapic on Pecan Production

A persistent problem was identified in pecan (Carya illinoinensis) orchards throughout southern Georgia in which pecan trees growing in rows immediately adjacent to peanut (Arachis hypogaea) fields developed hollow pecans. In-shell nut size and appearance was normal; however, the kernels failed to d...

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Bibliographic Details
Published in:HortTechnology (Alexandria, Va.) Va.), 2010-04, Vol.20 (2), p.427-430
Main Authors: Wells, M. Lenny, Prostko, Eric P
Format: Article
Language:English
Subjects:
adverse effects
Arachis hypogaea
Carya illinoinensis
field crops
imazapic
leaves
nontarget organisms
nut crops
orchards
peanuts
pecans
plant nutrition
potassium
seed development
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Summary:A persistent problem was identified in pecan (Carya illinoinensis) orchards throughout southern Georgia in which pecan trees growing in rows immediately adjacent to peanut (Arachis hypogaea) fields developed hollow pecans. In-shell nut size and appearance was normal; however, the kernels failed to develop. In 2008 and 2009, research was conducted to evaluate the influence of imazapic on pecan nut development in two pecan orchards located at the University of Georgia Ponder Research Farm located near Tifton, GA. Three herbicide treatments were evaluated, including imazapic at 0.17 kg·ha–1, imazapic at 0.30 kg·ha–1, and a nontreated control. Imazapic inhibited pecan kernel production and shuck split during both years of study. In 2009, leaf potassium was reduced by the low rate of imazapic.
ISSN:1063-0198
1943-7714
DOI:10.21273/horttech.20.2.427