Longevity of Imidacloprid Soil Drench on Citrus Nursery Stock for Sale at Retail Stores in Florida - eScholarship

Journal of Citrus Pathology(2014)

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摘要
The Florida psyllid testing project (Manjunath et al. 2008, Halbert et al. 2012) showed that about 10% of regulatory samples of Diaphorina citri Kuwayama collected by Florida Department of Agriculture and Consumer Services, Division of Plant Industry (FDACS/DPI) inspectors from plants for sale in Florida were positive for Candidatus Liberibacter asiaticus (Las). Most of the commercial nurseries that produce the plants do not have psyllids or Las, so the most likely source of contamination is the retail venues themselves. If this is the case, great benefit could be achieved by preventing psyllid infestation in retail stores. Florida has a requirement that citrus plants for sale be treated with an imidacloprid-based soil drench (ISD). Producers are required to tag the plant with the date of treatment. The treatment expires in six months, but our data indicate that three months probably is more realistic. In 2009, there was an increase in plants infested with psyllids 30 days post-ISD treatment. In later years, this increase was not so pronounced or did not exist, suggesting that growers are getting better control.
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