Effectiveness of several dosage formula of oil and nano emulsion of citronella against vascular streak dieback (VSD) disease on cocoa

International Conference on Agriculture, Environment, and Food Security

农业科学;生态环境科学

Noveriza, R.^1 ; Trisno, J.^2 ; Rahma, H.^2 ; Yuliani, S.^3 ; Reflin^2 ; Martinius^2

Indonesian Spice and Medicinal Crops Research Institute, Bogor, Indonesia^1

Faculty of Agriculture, Andalas University, Padang, Indonesia^2

Indonesian Center for Agricultural Post Harvest Research and Development, Bogor, Indonesia^3

关键词: Nano-emulsions;    Oil formula;    Vascular tissue;    West sumatra;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/122/1/012028/pdf
DOI  :  10.1088/1755-1315/122/1/012028

来源: IOP

【 摘 要 】

The disease of Vascular streak dieback (VSD) is a deadly disease of cocoa plants, because it attacks the vascular tissue of cocoa at growing point of the plant. In West Sumatra the disease was first reported in 2015 with an incidence of disease range 58.82% - 100% and an intensity of disease range 24.29% - 44.7%. The purpose of this study was to examine the effectiveness of dosage application of oil formula and nano emulsion of citronella formula against Vascular streak dieback (VSD) disease on cocoa plants in West Sumatra (in Padang Pariaman District and Limapuluh Kota District). The results showed that the percentage of VSD disease attacks in both testing sites was 100%. The oil and nano emulsion of citronella formulas can reduce the intensity of VSD disease on cocoa plants in West Sumatra, particularly in Padang Pariaman District and Limapuluh Kota District. The reduction of VSD intensity in Padang Pariaman district ranged from 8.32 to 21.13%; while in Limapuluh Kota district ranged from 4.33 to 11.80%. The nano emulsion of citronella formulation is effective to suppress the intensity of VSD disease on cocoa plants at doses 0.1% (≥ 30% of effectiveness level).