Utilization of Plant Growth Promoting Rhizobacteria (Pgpr) in Disease Control Important in Plants Onion (Allium Ascalonicum L.)

Abstract

Red onion (Allium ascalonicum L.) is one of many horticultural crops consumed by humans as a mixture of spices. For household consumption of about 635 700 tonnes, non-household consumption such as the manufacturing industry amounted to 719 200 tonnes, the sum total of 1.35 million meaning that the deficit for the onion. The purpose of this study was to gain insight about PGPR in increasing the growth and yield of onion, PGPR role in controlling the disease in onions, PGPR concentration in controlling the disease in onions and certain PGPR concentration in the application to control diseases in onion. Using a randomized block design (RAK) factorial 5 x 3 and repeated 3 times. The first factor is the concentration of PGPR with 5 levels ie: p0 (control), P1 (5 ml / liter of water / 2 plants), P2 (10 ml / liter of water / 2 plants), P3 (15 ml / liter of water / 2 plants) and P4 (20 ml / liter of water / 2 plants) and the second factor is the interval provision of PGPR with 3 levels namely: I1 (1 week, 1 x application until the age of 60 days, I2 (2 weeks, 1 x application until the age of 60 day) and I3 (3 weeks, 1 x application until the age of 60 days). the results showed that the onion crop by PGPR could increase plant height (21, 67 cm), number of leaves (32.70 cm), the number of tubers per plant (17.69 g), the wet weight of tuber per plot highs (3460.00 g) and dry weight of tuber per plot (3010.20 g). the provision of PGPR can control fusarium wilt on the red onion. the higher concentration of PGPR with intervals of 3 weeks administration can suppress disease. fusarium wilt PGPR concentration of 20 ml/liter of water with intervals of 3 weeks administration can suppress disease attacks fusarium wilt the lowest (5.22%).

Maximize Growth and Productivity of Rice by Using N2-Fixing Anabaena oryzae and Spirulina platensis Extract

“…Use plants with IAAproducing bacteria to increase growth and yield. A similar result has been cited by (Fernandes et al, 2018 andSutariati et al, 2019). In addition to, Spirulina extract amino acids (methionine, glycine, tryptophan and phenylalanine) increase the growth substances and enhance number of leaves and leaf area/plant (Yassen et al, 2018 andNoroozlo et al, 2019).…”

Characterization of phosphate and potassium solubilization, and antifungal activity of bacteria isolated from rhizosphere of Allium ascalonicum (L.) grown in Ninh Hai district, Ninh Thuan province, Vietnam

“…Bacterial growth promoting bacteria on red onion plants had been isolated and characterized, including nitrogen fixation, phosphate solubilization, and IAA synthesis [16,17]. Selected strains were also able to increase vigor and viability of purple onion seeds [16], increase plant height, number of leaves, number of bulbs, fresh and dry weight of bulbs [18], increase growth rate and tolerance index [19]. Besides, for the antagonistic ability of PGPR, the study of Fernandes et al (2018) had shown the ability to control wilt disease caused by Fusarium on red onions [18].…”

“…Selected strains were also able to increase vigor and viability of purple onion seeds [16], increase plant height, number of leaves, number of bulbs, fresh and dry weight of bulbs [18], increase growth rate and tolerance index [19]. Besides, for the antagonistic ability of PGPR, the study of Fernandes et al (2018) had shown the ability to control wilt disease caused by Fusarium on red onions [18]. Fusarium is the largest genus of fungi causing wilt disease for many crops.…”

Effect of antagonistic bacteria and its formulation to control fusarium wilt disease on shallot

“…This condition is possible because some bacteria can enter the inside of the plant roots, associated with plants, and also fix nitrogen, so plant nutrients are well maintained. Bacteria colonize tissues in plants so that it stimulates plants to increase the production of secondary metabolites that play a role in plant resistance, including the production of indole acetic acid (IAA) hormone, increased activity of fungal cell wall-degrading enzymes (peroxidase, chitinase, ß-1.3 glucanases), pathogenesis-related protein (PR), and phytoalexin [8,9].…”