12/28/2023 0 Comments Fire pearSignificant progress on non-antibiotic control has been made, and various resources are provided here. Food and Drug Administration.Ģ014 was the last season in which organic growers could use antibiotics to control fire blight. In addition, such an application may also result in illegal residues that could subject the crop to seizure or embargo action by WSDA and/or the U.S. Application of a pesticide to a crop or site that is not on the label is a violation of pesticide law and may subject the applicator to civil penalties up to $7,500. Additionally, some pesticides reported in these resources were used under state-authorized experimental permits at rates higher than allowed on the label. Applicators are reminded that it is your responsibility to check the state registration status of a label before using the product to ensure lawful use and to obtain all necessary licenses, endorsements and permits in advance. Note: Within some of the following resources, pesticides are discussed which are not yet registered in Washington State. Below are some information resources for stakeholders interested in learning more about the disease and its control in organic orchards. An Organic Tree Fruit Industry Work Group was formed at the request of the NOSB to help keep them informed of progress with non-antibiotic control techniques. The National Organic Standards Board (NOSB) voted to phase out these materials in October 2014, based on what could be considered incomplete information. They undergo a sunset review every 5 years. These materials, while produced by naturally occurring microorganisms, are considered synthetic and thus listed on the National List of Allowed Synthetics. The National Organic Program allowed for the use of the antibiotics streptomycin and oxytetracycline for control of fire blight on organic apples and pears since its inception in 2002. It typically infects the blossoms of the tree, and various treatments may be applied at this time before any fruit is developed. (7/22/17)įire blight is a serious bacterial disease of apples and pears across the U.S. Also, more fire blight tolerant pear cultivars have been released and are being evaluated. Fire blight tolerant germplasm will be the next big step, and this is now available in the ‘Geneva’ series of apple rootstocks, for example. Research is on-going as new materials such as a fire blight specific phage (virus) are developed, and more is learned about the best timing and sequence of different materials. Russet of the fruit with some materials and timings remains one challenge. Specific products and strategies can be used for effective control, and a number of growers have reported success. This publication provides a synthesis of recent advances in non-antibiotic fire blight management along with basic biology of the disease. NEW! “ Organic fire blight management in the western U.S.” was just released on eXtension. Fire Blight Control in Organic Apples and Pears
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