02564nas a2200301   4500008004100000245017800041210006900219260001200288300001200300490000800312520152300320653001501843653002201858653001501880653002301895653001401918653001901932653002101951653002401972653001201996100003202008700002202040700001802062700001902080700001902099700001402118856013002132       2005                        eng d00aSeasonal occurrence, distribution and sampling indices for <i>Myzus persicae </i>(Hemiptera: Aphidoidea) and its parasitoids (Hymenoptera: Braconidae: Aphidiinae) on tobacco0 aSeasonal occurrence distribution and sampling indices for iMyzus  c2005///  a459-4680 v1023 aField studies were conducted, in order to assess the seasonal occurrence and the spatial distribution of Aphidius colemani Viereck, Aphidius matricariae Haliday, Diaeretiella rapae (M'Intosh), Praon staryi Kavallieratos & Lykouressis and Praon volucre (Haliday), all parasitoids of Myzus persicae (Sulzer) on tobacco. The experiments took place in western Greece (Agrinion, Aitoloakarnania), during the 1996 and 1997 growing seasons, in an area of approximately 2.5 ha, where tobacco was the main crop. The experimental field was insecticide-free and tobacco leaf samples (from the upper and lower half of plants) were taken from June until September, in both years. The distribution of the species found was also represented and discussed. Generally, high M. persicae densities were recorded in August (mid-season) of both seasons. The mummification rate showed a specific increasing trend late in the season (August-September). In 1996, the percentage of mummification reached almost 61% at the end of the period, whereas in 1997 it remained at very low levels (<2%). The density of M. persicae was higher on the leaves collected from the upper part of the plants than on those from the lower part, but without significant difference. In contrast, the numbers of mummified M. persicae individuals were significantly higher on leaves collected from the lower part of the plants than on those from the upper part in both years. The relative abundance of the aphidiine parasitoid species differed between the two years.10aAphidiinae10aAphidius colemani10aAphidoidea10aDiaeretiella rapae10aHomoptera10aMyzus persicae10aSampling indices10aSeasonal occurrence10aTobacco1 aKavallieratos, Nikolaos, G.1 aAthanassiou, C.G.1 aTomanovic, Z.1 aSciarretta, A.1 aTrematerra, P.1 aZikic, V.  uhttps://icgf.myspecies.info/content/seasonal-occurrence-distribution-and-sampling-indices-myzus-persicae-hemiptera-aphidoidea