It is believed that using a more conservative threshold has more chances to allow site-specific weed management in the long term as compared with a more tolerant weed threshold, as demonstrated by … For short-term decision making the goal of the grower managing a weed problem is to determine the optimal level of herbicide and non-herbicide inputs for a given weed density that will maximise the … Site-specific management plans based on each species’ economic threshold are a necessary step in reducing herbicide use and increasing weed diversity on cropland.