The strategy of the sharka eradication in Poland
2001
Zandarski, J. (The main Inspectorate of Plant Protection, Torun (Poland). The Central Laboratory)
In Poland sharka has been reported since 1961. Plum pox potyvirus, the causal agent of the sharka, has a quarantine status in Poland since 1990. The extend and the prevalence of the sharka occurrence had not been recognized until 1996, when the delimiting survey was carried out. It led to the conclusion that sharka occurred on the whole territory of Poland, also in scions orchards and nurseries, but in various prevalence. Southern regions were the most affected. It became clear that strict measures were necessary for the containment and the eradication of the sharka in Poland. The official program was developed in 1998 in co-operation with the Institute of Pommology and Horticulturae in Skierniewice. The program includes the eradication of sharka from propagative material used for planting (scions orchards, rootstocks crops and nurseries), and also from commercial orchards as well as other crops of PPV host plants (small orchards attached to a homesteads, allotment gardens and wild sharka hosts). General guidelines were: the increase of the number of crops inspected, the uniform procedures of the inspection conducting and sampling, and strictly observed eradication. Each infected tree is rooted out. Particular strict measures are taken in the case of scions orchards, rootstocks crops and nurseries. The detection of PPV in those crops means, except removal of infected plants, the prohibition of using plants or their parts for further propagation until the crop is recognized as free from the disease. Additional preventive measures (e.g. spraying against aphids) are applied in each case. All these measures have resulted in complete eradication of the sharka from scions orchards, the elimination of the commercial movement of the infested plant material originating from scions orchards or nurseries and the reduction of the prevalence of PPV in nurseries and surrounding crops.
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