ABSTRACT The spatial pattern of Sharka disease, caused by Plum pox virus (PPV) strain M, was investigated in 18 peach plots located in two areas of southern France. PPV infections were monitored visually for each individual tree during one to three consecutive years. Point pattern and correlation-type approaches were undertaken using the binary data directly or after parsing them in contiguous ...

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Sour cherry cv. Marasca is considered a native Croatian variety with the best fruit quality in Northern Dalmatia region. The current production not sufficient to cover demand, therefore new orchards should be established pathogen-tested planting material. To select virus- and bacteria-free mother trees, survey was conducted largest plantation "Vlačine". ELISA on 205 trees (51 elite, 103 average...

BACKGROUND Homology-dependent selective degradation of RNA, or post-transcriptional gene silencing (PTGS), is involved in several biological phenomena, including adaptative defense mechanisms against plant viruses. Small interfering RNAs mediate the selective degradation of target RNA by guiding a multicomponent RNAse. Expression of self-complementary hairpin RNAs within two complementary regio...