but have been banned in Brazil and the European Union. In 2016, the EPA allowed use of streptomycin and oxytetracycline on orchards with citrus fruits like grapefruits, oranges and tangerines in Florida on an emergency basis, this approval was expanded and broadened to other states for oxytetracycline in December 2018. Further expansion of medically important antibiotics is proposed by the EPA but opposed by the FDA and CDC, primarily as antibiotic resistance can be expected to develop and affect human health. Peptide University of California scientists have discovered a peptide that prevented and treated citrus greening disease in greenhouse trials; as of 2021, it is being tested in field trials. The university entered into an exclusive license with Invaio to develop an enhanced injectable version of the product. Cover crops Some success has been reported using a cover crop strategy. The citrus trees were not free of the disease bacteria, yet a healthy soil environment allowed them to produce fruit and remain profitable. See also Citrus black spot Plant pathology References Further reading External links Asian citrus psyllid on the UF / IFAS Featured Creatures Web site Species Profile – Citrus Greening and Species Profile – Asian Citrus Psyllid, National Invasive Species Information Center, National Agricultural Library. Lists general information and resources for citrus greening and the Asian citrus psyllid. CISR: Huanglongbing/Citrus Greening Center for Invasive Species Research page on Huanglongbing and Citrus Greening Bacterial citrus diseases Bacterial tree pathogens and diseases Candidatus taxa