The endemic Chinese psyllid genus Cornopsylla Li is reviewed with a revised generic diagnosis. Cornopsylla zanthoxylae Li and C. trichotoma Li are redescribed, and Cornopsylla magna sp. nov. and C. rotundiconis sp. nov. are described. Keys to adults and nymphs of this genus are given, and the systematic position of Cornopsylla is reviewed. The potential of Cornopsylla spp. as major pests on cul...

anthocoris nemoralis (f.) (hemiptera: anthocoridae) is one of the most prominent predators of the pear psylla, cacopsylla pyricola (forster) (hemiptera: psyllidae) and is considered as a biological control agent against this pest. in order to investigate the effects of plant varieties on predation of c. pyricola by a. nemoralis, the functional response of both the sexes of a. nemoralis to pear ...

Abstract In the framework of a survey arthropods in rest stops Hungarian highways, 19 species jumping plant lice were collected. Three belong to family Aphalaridae, one Calophyidae, two Liviidae, nine Psyllidae and four Triozidae. Two ( Livilla variegata Trioza neglecta ) are alien, non-indigenous species; others native Hungary. The most abundant Calophya rhois , Cacopsylla melanoneura . specim...

Time-series analysis is used widely in ecology to study complex phenomena and may have considerable potential to clarify relationships of genetic and demographic processes in natural and exploited populations. We explored the utility of this approach to evaluate population responses to management in razorback sucker, a long-lived and fecund, but declining freshwater fish species. A core populat...

For studying meiosis in males, large samples of Cacopsylla myrtilli (Wagner, 1947) (Hemiptera, Psyllidae) were collected in Norway, Sweden, Finland and northwest Russia. In addition to all-female populations, males were present in 10 out of 47 populations; still, all populations were highly female-biased, the proportion of males varying from 0.1% to 9.1%. These males are thus rare or so-called ...

Defense elicitors are products that activate acquired defense responses in plants, thus rendering the plants less susceptible to attack by a broad range of pests. We demonstrated previously under laboratory conditions that foliar applications of the defense elicitors Actigard (acibenzolar-S-methyl), Employ (harpin protein), or ODC (chitosan) to potted pear trees (Pyrus communis L.) each caused ...

Food security is threatened by newly emerging pests with increased invasive potential accelerated through globalization. The Neotropical jumping plant louse Russelliana solanicola Tuthill is currently a localized potato pest and probable vector of plant pathogens. It is an unusually polyphagous species and is widely distributed in and along the Andes. To date, introductions have been detected i...