d) Viry a virům podobné organismy
1. Apple proliferation mycoplasm (= syn. pro 'Candidatus Phytoplasma mali')
2. Apricot chlorotic leafroll mycoplasm (= syn. pro 'Candidatus Phytoplasma prunorum')
2.1. 'Candidatus Phytoplasma ulmi'
3. Pear decline mycoplasm (= syn. pro 'Candidatus Phytoplasma pyri')