Effect of Calcium, Magnesium, and Aluminum-Iron on the Susceptibility of Loblolly Pine Seedlings to Fusiform Rust

S.J. Rowan

Treesearch

Effect of Calcium, Magnesium, and Aluminum-Iron on the Susceptibility of Loblolly Pine Seedlings to Fusiform Rust

Informally Refereed

Authors:

S.J. Rowan

Year:

1979

Type:

Research Note

Station:

Southern Research Station

Source:

Res. Note SE-285. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southeastern Forest Experiment Station. 4 p.

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Abstract

The susceptibility (percentage of seedlings infected) of Pinus taeda seedlings to infection by Cronartium quercuum f. sp. fusiforme was not affected by fertilization with calcium, magnesium, or aluminum-iron. Fertilization with Al as Al₂(SO₄)₂,and Fe as FeCl₂, however, significantly reduced seedling height growth during the first 8 weeks after seedling emergence and increased numbers of fusiform rust galls per unit of seedling height present at time of inoculation.

Keywords

Pinus taeda, Cronartium quercuum, rust testing, disease resistance

Citation

Rowan, S.J. 1979. Effect of Calcium, Magnesium, and Aluminum-Iron on the Susceptibility of Loblolly Pine Seedlings to Fusiform Rust. Res. Note SE-285. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southeastern Forest Experiment Station. 4 p.