Tree growth, production and huanglongbing incidence of sweet orange varieties using different nursery tree standards

Author(s)

Pacheco, Camilla de Andrade ^[1] ; Moreira, Alecio Souza ^[2] ; Girardi, Eduardo Augusto ^[2] ; Bassanezi, Renato Beozzo ^[1] ; Stuchi, Eduardo Sanches ^{[2, 3]}

Affiliation

^[1] Fundecitrus, Fundo Def Citricultura, Araraquara, SP - Brazil

^[2] Embrapa Mandioca & Fruticultura, Cruz Das Almas, BA - Brazil

^[3] Fundacao Coopercitrus Credicitrus, Bebedouro, SP - Brazil

• Document type: Journal article
• Source: Scientia Horticulturae; v. 284, JUN 27 2021.
• Web of Science Citations: 0

Abstract

Insect-proof propagation of citrus is recommended to prevent vector-transmitted pathogens such as Candidatus Liberibacter spp. and Xylella fastidiosa. Although larger nursery trees were related to a superior post-planting performance in other perennial crops, there are few studies on citrus. This fact motivated us to evaluate the tree growth, the fruit production, and the huanglongbing (HLB) incidence of four commercial sweet orange varieties ('Valencia Late', `Hamlin', `Pera' and `Folha Murcha') using two nursery tree standards (young whip and large headed trees). Eight years after planting, the tree size was similar between the evaluated treatments, especially for more vigorous varieties. However, large headed trees anticipated and increased the cumulative production by 30 % in average, which can improve the performance of reset trees in particular. Regardless the nursery tree standard and sweet orange variety, the cumulative incidence of HLB was relatively high over eight years. Therefore, a strict control of the vector should be reinforced in the field irrespectively of these factors. (AU)

• FAPESP's process: 14/26758-0 - Citrus HLB citrus: selection for resistance, survival analysis of scion / rootstock combinations and planting systems
• Grantee: Eduardo Sanches Stuchi
• Support type: Regular Research Grants