US exemption for citrus greening PIPs
The US EPA has established a temporary tolerance exemption for two defensin proteins (SoD2 and SoD7) from spinach plants when used as plant incorporated protectants (PIPs) in genetically modified citrus plants. The US company, Southern Gardens Citrus Nursery (Clewiston, Florida), applied for the exemption in association with an experimental use permit to test the citrus plants, which have been modified to resist bacterial citrus greening disease or Huanglongbing (Candidatus liberibacter asiaticus). The disease is spread by Asian citrus psyllids (Diaphorina citri). The company sought to test the citrus plants on a total of 200 acres (81 ha) in Florida and Texas between May 1st 2015 and April 18th 2018.