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Cytex And Other Chemicals Effectively Inhibit Conelet Abortion In Longleaf Pine

Yields in longleaf pine seed orchards could be much improved by treating foliage and conelets in spring with antiabortion chemicals. Cytex® , an extract of marine algae, is an economical source of cytokinin activity. When applied operationally as a 1 percent foliar spray using a mist blower, Cytex increased first-year conelet retention from 33 to 62 percent, 51 to 78 percent, and (with boron) from 33 to 72 percent respectively in three separate annual tests. The anti-abscission chemicals 8-hydroxyquinoline, cobalt chloride, and picloram increased firstyear cone retention from 51 percent to 83, 81, and 75 percent, respectively, in 1982.


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Author(s): Robert C. Hare

Publication: Tree Improvement and Genetics - Southern Forest Tree Improvement Conference - 1983