Author/Editor		Osler, Ruggero; Petrovič, Nataša; Ermacora, Paolo; Seljak, Gabrijel; Brzin, Jernej; Loi, Nazia; Cararro, Luigi; Ferrini, Francesca; Refatti, Elvio
Title		Control strategies of apple proliferation, a serious disease occuring both in Slovenia and in Italy
Translated title		Strategije nadzora nad metličavostjo jablan, resno boleznijo, ki se pojavlja tako v Italiji kot tudi v Sloveniji
Type		članek
Source		In: Dobrovoljc D, Urek G, editors. Zbornik predavanj in referatov 5. slovensko posvetovanje o varstvu rastlin; 2001 mar 6-8; Čatež ob Savi. Ljubljana: Društvo za varstvo rastlin Slovenije,
Publication year		2001
Volume		str. 238-43
Language		eng
Abstract		Apple proliferation (AP) is a serious disease that mainly affects apple-trees. It is caused by a phytoplasma diffused in Europe, particularly in the South. Recently, serious epidemics have been reported to occur in northern Italy, particularly on cvs Golden Delicious, Florina, Canadian Renette and Granny Smith, grafted on different rootstocks. The disease. was found to be in progress also in Slovenia. Also the new genotypes resistant to scab and derived from Malus floribundh are susceptible to AP. Because of the poor quality of fruits, the infected orchards easily became economically not convenien., In Friuli-V G., the percentage of symptomatic trees in an infected' orchard can be easily over than 50%. In general, depending-on the environment, cultivar and agronomic treatments the iarfected trees can recover from the symptoms and produce regularly. In some cases, the fruits produced by recovered trees are near to normal and of good quality. The disease has been recorded also in nurseries. In this case AP was transmitted to the young, seedlings either by grafting or by natural vectors. In both cases a great and complicate problem arises. In nature the AP - agent is transmitted at least by two species of psylla (Cacopsylla costals and C. melanoneura). AP is systemic in the host plant and- it is transmitted also by grafting. The cycle of AP and of the natural: vectors is roughly known. At present, we dispose of sensitive and reliable diagnostic techniques as: the use of DAPI, staining, serology and molecular biology techniques. The disease is not possible to be practically cured. Preventive procedures are on the contrary possible, mainly based on the knowledge of the epidemiology of AP. The most important. (Abstract truncated at 2000 characters)
Descriptors		FRUIT FUNGI