This paper presents the history, distribution, types, transmission and symptoms of the Citrus Huanglongbing (HLB) disease, and discusses the causal organisms and their vectors including impacts for Florida and Brazil (two relatively new areas where the disease has been discovered) as well as...

At least 10 species of aphid are known to be vectors of plum pox virus (PPV) in stone fruit crops. In Poland, the most effective vector is Brachycaudus helichrysi, followed by B. cardui, Phorodon humuli and Hyalopterus pruni, while Nectarosiphon persicae [Myzus persicae] occurs in stone fruit...

North American populations of 13 aphid species were tested for their ability to transmit isolates of Plum pox potyvirus recovered from infected trees in Adams, Franklin, and York Counties, PA. Seven species, Aphis fabae, A. spiraecola, Brachycaudus persicae, Metopolophium dirhodum, Myzus persicae, ...

Whitefly-transmitted geminiviruses are considered some of the most important pathogens of food and industrial crops in tropical and subtropical regions of the world, including most of the countries in Latin America. In Colombia, however, these viruses are not yet considered pathogens of economic...

Several aphid non-transmissible strains of zucchini yellow mosaic virus (ZYMV) have been described, in relation with mutations in the 2 viral proteins required for transmissibility, coat protein and helper component. Assistance mechanisms were previously shown to allow transmission of such strains...

This is the first report on the occurrence of citrus leprosis rhabdovirus and its mite vector, Brevipalpus phoenicis (Acari: Tenuipalpidae) at Paraíso do Tocantins, Tocantins State, Brazil. This mite was also observed in the North of Mato Grosso State.

An evaluation of several black currant (Ribes nigrum) cultivars recommended or suggested as indicators for reversion disease, showed Baldwin to be the most sensitive. Kentish Hero and Silvergieters Schwarze were almost as sensitive as Baldwin, but Ojebyn did not express definitive symptoms. A...

The incidence of citrus variegated chlorosis (CVC) (caused by Xylella fastidiosa transmitted by sharpshooter leafhoppers (Hemiptera: Cicadellidae)) was recorded in 7 orchards in northern São Paulo, Brazil. The 7 areas were planted with sweet orange (Citrus sinensis) grafted on Rangpur lime (C....

Experimental transmission of European stone fruit yellows phytoplasma to Japanese plum cv. Ozark Premier was achieved using Cacopsylla pruni, caught in the field or raised on infected plants under controlled conditions. Using different groups of infectious psyllas, 89% of the inoculated test plants ...