Effect of salicylic acid on development of bacteria wilt disease (Ralstonia solanacearum) in tomato

Madiha, Norhayati (2009) Effect of salicylic acid on development of bacteria wilt disease (Ralstonia solanacearum) in tomato. [Project Paper] (Submitted)

Text lpFSPM2009 81 - NORHAYATI BT MADIHA.pdf Download (3MB)

Abstract

The effect of salicylic acid (SA) on infection potential of bacterial wilt disease on development of tomatoes caused by Ralstonia solanacearum was studied. The effect of different concentrations of SA on development of bacteria colony was tested in vitro. The in-vitro experiment was conducted in a completely randomized design with IO concentrations of SA in 7 replicates for each treatment over 2 weeks. Two selected concentrations of SA were subsequently included in a pot experiment. The inhibition of SA on bacteria colony development showed significant differences at P < 0.05. Two best concentrations were selected, which are 10 and 40 ppm of SA to be sprayed onto tomato plants. A pot experiment was carried out in randomized complete block design to study the effect of foliar application of SA on the development of bacterial wilt disease on tomato. Each block consisted of 3 treatments (0, IO and 40 ppm) with 5 tomato plants per treatment in the netted greenhouse. Six parameters were measured namely plant height, fresh and dry weight of plants, chlorophyll content, average fruit weight and disease incidence. Tomato plants were harvested 11 weeks after pathogen infection. Results showed that % of disease incidence in infected plants gradually increased with increasing time of infection (100% at 11 weeks). Treatment with 40 ppm of SA significantly reduced percentage disease incidence. Plant height, fresh and dry weight, average fruit weight and chlorophyll content significantly increased after foliar application of SA as compared with control. Thus, SA has potential to be used for controlling R. solanacearum in tomatoes.

Item Type:	Project Paper
Subjects:	S Agriculture > SB Plant culture
Faculty:	Faculty of Agriculture and Food Sciences
Depositing User:	Mr. Azman Mohamad
Date Deposited:	08 Dec 2025 08:19
Last Modified:	08 Dec 2025 08:19
URI:	http://psaspb.upm.edu.my/id/eprint/2579

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