Peculiarities in the distribution of scale-insects (Homoptera: Coccoidea) on deciduous fruit trees in Hungary.
The distribution maps of 11 species of Coccoidea (Quadraspidiotus perniciosus, Q. ostreaeformis, Q. pyri, Epidiaspis leperii, Lepidosaphes ulmi, Pseudaulacaspis pentagona, Palaeolecanium bituberculatum, Parthenolecanium corni, Sphaerolecanium prunastri, Eulecanium mali [E. tiliae] and Phenacoccus aceris) on apple, pear, peach, plum, cherry and sour cherry [Prunus cerasus] in Hungary are given from samples collected in 1971. Q. perniciosus was distributed over the whole country on all the fruit trees listed, while Epidiaspis leperii was frequent on pear and plum over the whole country, and in addition on apple on the north-west. Q. ostreaeformis was frequent on the Great Hungarian Plain. L. ulmi and Parthenolecanium corni were distributed in the north, while Pseudaulacaspis pentagona was known from the southern part of the country only.