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Home → Publications → Tree Planters' Notes → Tree Planters' Notes Volume 22, Number 2 (1971) → Foliar Composition of Jack Pine and Red Pine as Related To Vulnerability of These to Needle Cast Disease

Foliar Composition of Jack Pine and Red Pine as Related To Vulnerability of These to Needle Cast Disease

Investigations conducted in the control of needle cast disease of tree planting stock by Manzate fungicide included the foliar analyses of 2-year-old red pine and jack pine seedlings. Fungicide was not used on the nursery beds. The jack pine seedlings were included in analyses with the intention of detecting characteristics of this tree species responsible for its immunity to needle cast disease, Lophodermium pinastri (Baxter 1952). The samples of nursery stock were collected in the Boscobel, Griffith, and Hugo Sauer State forest nurseries of Wisconsin and the USDA Forest Service nursery at Eveleth, Minn. Foliar tissues were dried at 75° C., ground in a Wiley mill equipped with stainless steel knives, and ashed overnight at 500° C. (Wilde et al. 1964). The ash was dissolved in approximately 1.0 N HNO3 containing Li as an internal standard. The concentration of elements in the ash solution was determined by means of an emission spectrometer (Christensen et al. 1968).


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Author(s): Jaya G. Iyer, E. E. Schulte, G. W. Randall

Publication: Tree Planters' Notes - Volume 22, Number 2 (1971)

Volume: 22

Number: 2