The species of pear sucker, also called psylla or psyllid, which are destructive insects belonging to the genus Cacopsylla (Hemiptera: Psyllidae) cause substantial damage tree plantations. Two consecutive years research were conducted on population structure and biological cycle in a small, elderly, unmaintained orchard northern Romania. Of two identified (C. pyri L. C. pyricola Forster), domin...

Arthropod populations from agricultural fields sometimes depend on the surrounding landscape structure, both composition and configuration, which affects multiple life-history traits of arthropods such as resources for survival, dispersion or death risk (e.g., predation parasitism). Moreover, effect may vary with distance to crop, depending factors organism requirements capabilities. This work ...