Currently, the mite is present in eight Florida counties, including: Trees already identified as positive for LEM in other counties will begin treatment in the coming weeks. This project ran from 2016 to 2018 to help address a potential barrier to the export of Australian lychees: the presence of common pest the lychee erinose mite (Aceria litchii). This process includes checking all lychee trees within a half-mile radius of any new find for the presence of the mite and resurveying previous negative sites. Trees that test positive will be defoliated, pruned, and treated by the FDACS Division of Plant Industry. They can grow to 100 feet (30 m.) tall and have an equal spread. Though oil alone didn’t completely eliminate the pests, the addition of pressure washing before, and two minutes after, the oil application further reduced their incidence. The researchers investigated simple postharvest treatments to reliably remove the mite from fruit destined for markets including the US and New Zealand. Efforts to control the mite are essential to safeguarding the industry. Funding statement: This project was a strategic levy investment in the Hort Innovation Lychee Fund. A Futures Contract On Produce In The U.S.? To find out more information or to track the eradication process visit FDACS.gov/LEM or contact the FDACS-DPI Helpline at 888-397-1517. But even lovely lychee trees are not pest free. The researchers found that paraffinic oil at three per cent concentration applied as a 30 second dip or flood spray reduced mites and other surface insects on fruit. SPW On RFD-TV: NC SweetPotatoes Gets A New A New Chief, Record Achievement For Four UF/IFAS Faculty Members, First Ever Florida-Israel Agriculture Innovation Summit Held, Low-Income Consumers — Particularly Children — Face Increased Food Safety Risk, Allowing A Cell Tower On Your Land — What You Give Up Versus What You Gain. DPI, in partnership with UF-IFAS has conducted extensive research which will guide the eradication process. Also of note, in the first year of LY16002 the project team considered the use of fumigation with ethyl formate and carbon dioxide as an alternative treatment for mites. Without treatment, an infestation of mites can severely damage the tree, fruit and flowers. Surveys for LEM will continue across the state. Without treatment, an infestation of mites can severely damage the tree, fruit and flowers. See Attachment A for details of treatment. After identification and an initial survey, the department quarantined movement of any lychee plant, plant parts or fruit from Lee County to any other Florida destination due to the dense population of the mite in the county. See Attachment A for details of treatment. LY16002 Disinfestation of mites on lychee in conjunction with radiation for improved market access of lychee to the USA 6 Introduction Australian lychee (Litchi chinensis) was granted market access to the USA in 2013 under a trial protocol that included irradiation as the disinfestation treatment. In early 2018 the mite was found in Lee County. “We have eradicated this pest twice before in 1958 and 1993, and we are confident in our methods to eradicate LEM again.”. However, the two-minute time lag required for the oil to be efficacious prior to the final water spray to remove dead or dying pests did impact on packing rates. It causes erineum galls, or hairy abnormal growths, to form on the leaves of the lychee tree. The purpose of this document is to provide lychee and longan growers with control recommendations for the Lychee Erinose Mite … As fruit experienced severe browning at the fumigation rates required to kill mites and other insect pests, the project moved its focus on to the oil and water method. LEM has been successfully eradicated twice in Florida, first in 1958 in Sarasota County and then in Miami-Dade County in 1993. The Final Research Report (in part or as whole) cannot be reproduced, published, communicated or adapted without the prior written consent of Hort Innovation (except as may be permitted under the Copyright Act 1968 (Cth)). The mite causes erineum galls (hairy, abnormal growths) to form on the leaves of the tree. Lychee trees produce delicious fruit, but they are also beautiful, majestic trees in their own right. 3. Re-skinned lychee varieties proved particularly suited to the oil treatment, with colour enhancement recorded and the fruit storing well for up to two weeks at 5°C. The mites are invisible to the naked eye and live on the underside of the leaves amongst the erinose. To date, only one positive tree has been identified in Miami-Dade County. Unchecked, an infestation of mites … These control measures will be taken at no expense to the owner and all debris will be removed. “The eradication of the lychee erinose mite is essential to protecting Florida’s lychee industry, the number one commercial production area for lychee in the United States,” said Dr. Trevor Smith, Director of the FDACS Division of Plant Industry. Subscribe/RSS. Lychee trees are susceptible to erinose mite but a simple remedy will have them producing fruit again in no time. In severe cases flowers are destroyed and fruit-setting prevented. Full details of the project can be found in the final research report, available for download at the top of this page. Key research provider: The Queensland Department of Agriculture and Fisheries, Publication date: Thursday, April 4, 2019, Treatment for mites on lychee fruit prior to irradiation for improved market access (LY16002). © 2018 Horticulture Innovation Australia Limited. QUESTIONS OR CONCERNS CONTACT THE DPI HELPLINE Following this work, Hort Innovation Lychee Fund project Mite and insect disinfestation of lychee fruit using high pressure water sprays (LY18000) was established to look at optimising the efficacy of high-pressure water application, to allow higher throughput on the packing line. Lychee tree pests can cause problems for the homeowner, given the size of the tree. Out of state shipments originating in Lee County are allowed with a proper phytosanitary certificate. Retreat each lychee tree identified as positive for Lychee Erinose Mite with approved sulfur‐based miticide seven (7) times after the onset of bud/leaf break unless directed by FDACS, DPI to stop treatment. Treatment Aims To Protect Lychee Trees In Miami-Dade, USDA Provides Florida $4 Million For Ag Pest And Disease Protection, United Fresh’s FreshFacts Report Identifies Retail Trends. The Florida Department of Agriculture and Consumer Services is beginning treatment of lychee trees in Miami-Dade County, the first of eight Florida counties undergoing eradication, for lychee erinose mite (LEM) to protect trees and crops from severe damage. Copyright: Copyright © Horticulture Innovation Australia Limited 2018. The project did find that oil dips could exacerbate surface fungi (rots) from about 10 days after treatment, predominately around the stalk end of fruit, but this problem wasn’t found with the flood spraying approach. The researchers investigated simple postharvest treatments to reliably remove the mite from fruit destined for markets including the US and New Zealand. It was recently detected in Lee County infesting lychee trees. Lychee erinose mite is a serious pest that deforms the plant and produces reddish-brown velvety growth on the underside of the leaves. Click here for a map of Florida counties with LEM through March 2020. The effect of the oil treatment in combination with irradiation on fruit quality was also evaluated. While lychees heading to these export destinations are subject to an irradiation protocol to eradicate target quarantine pests, the non-target erinose mite is able to withstand current irradiation rates – and higher rates could damage the fruit. The lychee erinose mite is a pest of lychee fruit trees. This project ran from 2016 to 2018 to help address a potential barrier to the export of Australian lychees: the presence of common pest the lychee erinose mite (Aceria litchii). This program is funded through the Plant Pest and Disease Management and Disaster Prevention Program in partnership with the USDA-APHIS. The treatment includes defoliation and pruning of the tree followed by up to eight applications of sulfur-based miticide. “The eradication of the lychee erinose mite is essential to protecting Florida’s lychee industry, the number one commercial production area for lychee in the United States,” said Dr. Trevor Smith, Director of the FDACS Division of Plant Industry. treatments for the presence of lychee erinose mite. However, it may be in other counties as well; this is under investigation. trees and decrease lychee yields by 80%. Further, the oil treatment was assessed in combination with irradiation, with no adverse interaction between the two seen – and during the project, a commercial shipment of lychees treated using oil and irradiation successfully entered the US.
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