Vol. 10, Issue 12 (2021)

Author(s):
RK Ranjan, PK Jha, Bimla Rai, Ritu Kumari and Subhashi Kumar

Abstract:
Bacterial wilt of potato and tomato caused by Ralstonia solanacearum Yabuuchi et al. (1995) is a highly destructive disease of solanaceous crops worldwide. Now, the disease is known to occur in all the states of India. The high percentage of plant mortality and lack of effective control methods make R. solanacearum one of the world’s most destructive plant pathogens. Therefore, management of bacterial wilt of potato and tomato by using resistance inducer chemicals were studied in the present investigation to manage this destructive disease and prevent the further spread of the disease. One month old tomato (Pusa Ruby) and potato (Kufri Jyoti) seedlings were drenched with 50 ml, 3mM concentration of resistance inducers chemicals like Acibenzalor – s- methyl (ASM), β - Aminobutyric acid (BABA), Benzoic acid (BA) and Salicylic acid (SA). Control pots were drenched with sterilized water. After 2 days of drenching with resistance inducer chemicals half of tomato and potato plants were inoculated with R. solanacearum. The observations were recorded after 7, 14 & 21 days after inoculation. The results of tomato inoculated plant revealed that the minimum population of R. solanacearum was found (3.00 cfu log/g tissue) in Benzoic acid treatment followed by Salicylic acid (3.221 cfu log/g), Beta aminobutyric acid (3.221 cfu log/g) and Acibenzalor s methyl (3.36 cfu log/g tissue) after 21 days of inoculation. The maximum population of R. solanacearum was found (4.65 cfu log/g tissue) in control. In case of potato, the results revealed that the minimum population of R. solanacearum was found (2.752 cfu log/g tissue) in Acibenzalor s methyl treatment followed by Benzoic acid (3.164 cfu log/g), Salicylic acid (3.318 cfu log/g) and β - Aminobutyric acid (3.762 cfu log/g tissue) after 21 days of inoculation. The maximum population of R. solanacearum was found (4.591 cfu log/g tissue) in control.