Journal of Taiwan Agricultural Research

Author:Su-Chen Lin, Su-Yuang Lin and Chi-Guang Wu

Abstract:

    In this study, three different herbicides, i.e., Isopropylamine salt of N-phospho-nomethyl glycine, 1,1-Dimethyl- 4,4-bipyridylium dichloride, and Bensulfuron- methyl benzoate, were evaluated for their influence on VA mycorrhizal fungi in terms of colonization and spore production of Ageratum houstonianum, dominant weed in the experiment field. In the first year survey, herbicide (isopropylamine salt of N-phosphonomethyl glycine) was significantly unhelpful to the colonization of Ageratum houstonianum after 14 days in use. In the second year survey, this herbicide was confirmed to be one of the factors harmful to the colonization of VA mycorrhizal fungi on Ageratum houstonianum. Although inhibition effect was not Significant in the first year study, the spore population was reduced extensively after the second year treatment of herbicides. The three herbicides tested in the experiment did not place any pressure on the composition change of VA fungal flora.

Key words:Herbicide, VA Mycorrhiza, Colonization, Spore

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