Vol. 53

Title:
Biology and Management of Nursery Weeds

Author:
Joseph C. Neal

pp: 120-123

Abstract:
INTRODUCTION

The cost of weed control in nurseries in the United States of America has been estimated to be between $2,389 and $5,506 (about $3700 and $8470 AU$) per ha per year (Gilliam et al., 1990; Darden and Neal, 1999) but may be as high as $96,000 per ha (about $148,000 AU$ per ha) when difficult to remove weeds such as bittercress (Cardamine sp.) and liverwort (Marchantia polymorpha) are present (Mathers, 1996). Research has shown that preemergence herbicides currently labeled for use in container nurseries are effective on the common nursery weeds (Judge and Neal 2001; Ruter and Glaze, 1992; Whitwell and Kalmowitz, 1989). Yet, despite frequent herbicide applications, weeds continue to emerge and must be removed by hand, a laborious and expensive process. To reduce weed control costs, nursery managers need to implement an integrated weed management program that includes an understanding of the target weeds and the available weed management options.

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