Cacopsylla pyrisuga, or the large pear sucker, is a species of true bug in the family Psyllidae known as a pest of pear trees in Central and North Europe. Since there is no effective peardecline treatment, your best bet is to purchase resistant plants in the first place. To learn more about symptoms of peardecline disease... Peardecline is characterized by two phases: quick decline and slow decline. Trees may wilt, scorch, and die in a few weeks, or lose vigor over several seasons... Keywords. peardecline, phytoplasm, diagnostic technique. - Proper Irrigation and Fertilization : Maintain optimal tree health to reduce susceptibility to infection. 2. Insect Control : - Chemical Control : Use insecticides to control pear psylla populations. Pear trees showing peardecline disease symptoms were observed in pear. orchards in the centre and north of Iran. Detection of phytoplasmas using. Phytoplasma pyri (peardecline disease) was found in samples from Italy, Spain, and the Republic of Dagestan; and Ca. The pear psylla, Cacopsylla pyri L. (Hemiptera Psyllidae), is known in Europe for its extended infestations which may cause heavy economical losses to most pear growing regions. Moreover, they transmit various pathogens 46 such as the phytoplasm Candidatus Phytoplasma pyri (Seemüller and Schneider, 2004) which is 47 responsible of the peardecline disease by... Peardeclinephytoplasm can affect cultivars of Japanese pear. During preliminary surveys carried out in 1991-92, in Emilia-Romagna (IT)... Cherry (Prunus spp.) - X-Disease. Pear (Pyrus spp.) - Decline. Cause A phytoplasma that is east of the Cascade Range and is spread by several leafhopper species... Peardecline viruses and phytoplasms.Peardecline is caused by Candidatus Phytoplasma pyri, transmitted by pear psylla or by grafting infected stock to healthy trees. unknown Peardecline. unknown Apple proliferation Stolbur Boir noir tuf-type II.Visual inspection, transmittion PCR, RFLP. Phytoplasm a solani’ (16SrXII-A). Bois noir. Virology/phytoplasms.Fruit (Malus, Pyrus, Cydonia, Prunus, Vitis). Investigation of distribution and epidemiology of peardecline (Candidatus Phytoplasma pyri, PD) and apple proliferation...
