Advanced search
Start date
Betweenand
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Huanglongbing and Citrus Variegated Chlorosis Integrated Management Based on Favorable Periods for Vector Population Increase and Symptom Expression

Full text
Author(s):
Bassanezi, Renato Beozzo [1] ; Primiano, Isabela Vescove [1]
Total Authors: 2
Affiliation:
[1] Fund Citrus Protect Fundecitrus, Dept Res & Dev, BR-14807040 Araraquara, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: PLANT DISEASE; v. 105, n. 10, p. 3037-3047, OCT 2021.
Web of Science Citations: 2
Abstract

Huanglongbing (HLB, associated with Candidatus Liberibacter asiaticus and transmitted by the Asian citrus psyllid Diaphorina citri) and citrus variegated chlorosis (CVC, caused by Xylella fastidiosa subsp. pauca and transmitted by sharpshooter species) have been managed by vector control and removal of symptomatic trees. Although vectors and new symptomatic trees can be detected year round, peaks of vector populations are higher in spring and summer, and the most symptomatic trees are found in autumn and winter. This work aimed to compare the management of both diseases during these favorable periods. The experiment was conducted during 5 years in a commercial orchard and had a three-by-two factorial design. The factor ``vector control{''} had three levels: monthly vector control year round (VCYR), monthly vector control in spring and summer (VCSS), and vector control when a threshold level of 10% occupancy was detected (VCOT). The factor ``inoculum removal{''} had two levels: monthly eradication year round (TEYR) and monthly eradication in autumn and winter (TEAW). Host flush, both HLB and CVC vector populations, and the number of symptomatic citrus plants were visually assessed. The level of vectors over the seasons, as measured using the average area under the curve (AUC), was similar for all treatments with the exception of psyllid abundance, which was approximately 4.5 times higher for VCSS than for other treatments. For both diseases, no difference in the average AUC of disease progress and disease final incidence was observed. VCOT or adjusted VCSS associated with TEAW could be integrated for sustainable citrus production. (AU)

FAPESP's process: 07/55013-9 - Molecular epidemiology and integrated management of Huanglongbing (asiaticus and americanus) in the State of São Paulo
Grantee:Armando Bergamin Filho
Support type: Research Projects - Thematic Grants