Effect of combination of biofertilizer and nanobiopesticide citronella against mosaic disease on patchouli plant

Abstract

Nanobiopesticide citronella (Nano-BC) at 1% concentration was effectively reduced the intensity of mosaic disease and yield loss ranging from 23 to 43%. The mixed formulation of Serratia marsescens AR1 and Pseudomonas fluorescens LPK1-9 with cow manure (15 kg/tree) and 0.1% nanobiopesticide citronella were able to reduce 20 to 25% the intensity of vascular streak dieback disease (VSD). The combination between biofertilizer and Nano-BC is assumed to be able to reduce the intensity of patchouli mosaic virus and its insect vector and increase the resistance of patchouli plants to the disease. The objective of this study was to obtain a dose of biofertilizer (0, 100, 200, 300 g) and 1% Nano-BC that effectively controlling patchouli mosaic disease and their vectors in the field. Research was conducted on patchouli var Sidikalang at Laing Experimental Garden, Solok from January to December 2018. Application of 1% Nano-BC and 300 g biofertilizer per plant showed as the best combination to reduce the incidence and intensity of patchouli mosaic disease in the field. In addition, the highest content of P2O5 was 39.00 ppm available in the soil, in which the efficacy rate ranged from 9.37 to 12.47%.