gummy bark disease of sweet orange (citrus sinensis) trees has been reported from a few citrus growing regions of the world. the disease symptoms consist of mild to severe stem pitting and brown gummy flecks in the bark of sweet orange trees on sour orange ( c. aurantium) rootstock, being conspicuous several centimeter above the bud :union: on the trunk. the pits were usually impregnated with b...

Background The history of the world citrus industry is marked by a series of diseases caused by different etiologic agents. Several of them are characterized as biotrophic pathogens like Xanthomonas citri subsp. citri, three Candidatus Liberibacter spp and Citrus leprosis virus C (CiLV-C). In plant-pathogen interactions, the role of salicylic acid (SA) in activating defense related genes is wel...

Maintaining fruit freshness and quality in extended storage life represents a major obstacle the production industry. One of easiest ways to prolong shelf is by dipping fruits suitable solution. In this research, we assessed effects time sweet orange cultivar with mixture containing 1.15% chitosan (CS) 0.39% polyvinyl alcohol (PVA) on external internal parameters oranges during 12 days at 30 °C...

Citrus orchards in northeastern Brazil are mostly rainfed and comprised basically of ‘Pera CNPMF D-6’ sweet orange budded on ‘Rangpur’ lime, for the drought tolerance productivity imparted by this rootstock. Therefore, selection new varieties is needed to broaden genetic basis citrus cultivated region. Accordingly, study compared vegetative, productive, fruit quality traits eight scions grafted...

ABSTRACT Citriculture is a growing industry in Pará state, Brazil, but information regarding fruit flies and their associated parasitoids this region lacking. To address gap knowledge, we collected oranges (Citrus sinensis), lime (C. common sweet limes limettioides), citrons medica) mandarins reticulata). We recorded field infestation by Anastrepha obliqua C. sinensis under natural conditions f...

The water deficit is one of the main limiting factors to yield sweet oranges. present study aimed determine alternative rootstocks ‘Rangpur’ lime for ‘Pera’ oranges grown on tropical hardsetting soils with greater potential tolerance deficit. Six citrus scion/rootstock combinations were during eight years in an orchard established Sergipe, Brazil. tree height, number fruits per plant, cumulated...