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Auxin treatment increased growth rate of Pinus radiata strobili, but later resulted in death, suggesting adverse effects.
The auxin 2,4,5-T in a 30 ppm aqueous solution was sprayed onto strobili of Pinus radiata at receptivity. Initially it caused considerable increase in growth rate, but generally this ended some 2 months later, in the death of the strobili. Forest Sci. 17:14-15.
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Sweet et al. (1971) studied this question.
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