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Control of Kalmia with Bialaphos, a Microbially Produced Phytotoxin

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A small plot experiment was carried out to investigate the effect of bialaphos, a microbially produced phytotoxin, on kalmia. Bialaphos was tested at five rates of application, including the control, and three dates of application, representing three phenological stages. Three weeks after bialaphos application in June and August, a complete defoliation of kalmia stems was observed. Second-year results revealed a significant quadratic effect of bialaphos rate on kalmia resurgence and a significant linear effect of bialaphos rate on kalmia height growth. Best control of kalmia resurgence (0 8/m²) and height growth (3.1 cm) was achieved with the highest application rate (2.5 kg a.i./ha). For both variables, the interaction between month of application and rate of application was not significant. The results obtained suggest that bialaphos could efficiently control kalmia on disturbed sites and thus prevent the establishment of an unproductive and persistent shrub seral stage. North. J. Appl. For. 8(4):147-149.

Document Type: Journal Article

Affiliations: Ministrè des Forêts du Québec, Direction de la Recherche, 2700, Rue Einstein, Sainte-Foy (Québec) Canada, G1P 3W8

Publication date: 1991-12-01

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  • Each regional journal of applied forestry focuses on research, practice, and techniques targeted to foresters and allied professionals in specific regions of the United States and Canada. The Northern Journal of Applied Forestry covers northeastern, midwestern, and boreal forests in the United States and Canada.
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