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Home Publications Tree Planters' Notes Tree Planters' Notes Issue 71 (1965) Chlorosis in a Southern Pine Nursery: A Case Study

Chlorosis in a Southern Pine Nursery: A Case Study

A lime-fertilizer trial demonstrated how pine seedling chiorosis in the Stuart Nursery 3 near Pollock, La., could be minimized by adjusting soil pH to between 5.5 and 6.0 and moderately fertilizing to maintain growth. Exact rates of fertilization were not established because seedlings were using plant food remaining from earlier applications. The trial showed that improper use of lime and fertilizer creates imbalances between iron and manganese in the seedlings, and that this condition may induce chiorosis. Chlorosis had been endemic in the Stuart Nursery for many years, persisting during the hot summer on terraces and at bed ends. Although eye-catching, chlorosis had had little effect on production until 1959, when it developed in May and spread rapidly to all parts of the beds. By late June, more than 10 acres of seedlings were seriously diseased, and unless a control could be found, complete mortality seemed inevitable in spots as large as 1 acre.

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Author(s): Eugene Shoulders, Felix J. Czabator

Publication: Tree Planters' Notes - Issue 71 (1965)