Plant extract and oils eliminate Cmm

Aprizal Zainal, one of the PMB Lab – PhD. (S3) alumnus under Prof. Sudarsono’s direction, has recently published part of his dissertation research finding. The following is information regarding the published journal:

Aprizal Zainal, Aswaldi Anwar, Satriyas Ilyas, Sudarsono, and Giyanto. 2010. Effectivitas ekstrak tumbuhan untuk mengeliminasi Clavibacter michiganensis subsp. michiganensis pada buah tomat (Effectiveness of plant extracts to eliminate Clavibacter michiganensis subsp. Michiganensis on tomato seeds). Jurnal Agronomi Indonesia 38(1): 52-59. March 2010 (in Indonesian – Abstract in English).


Objectives of experiments were to evaluate (1) in vitro inhibitory effects of plant extracts on Clavibacter michiganensis subsp. Michiganensis (Cmm), (2) inhibitory effects of plant extracts on Cmm infected tomato seeds, and (3) effectiveness of seed treatment plus plant extract to eliminate Cmm. After evaluating 20 plant extracts, curcuma rhizome and betel vine leaf extract, cinnamon and clove oil were selected for further test. Tomato seeds were artificially inoculated with Cmm to obtain high level of infection. Part of the seeds were dippep in either suspension of selected extracts for 20 minutes and the others were matriconditioned using a mixture of burned rice hull (at 22 C and RHN60-70%) plus either of plant extract or oils, respectively. Elimination of Cmm level from infected seeds was observed at 10 days after treatments. Results of the experiment indicated curcuma extract, betel vine extract, cinnamon oil or clove oil showed in vitro inhibitory effects on Cmm. Moreover, dipping infected seeds in either 5% of curcuma, betel vine extract, or 0.5% of clove oil or matriconditioning plus these extracts or oil were effective to eliminate Cmm from infected seeds. These treatments may potentially be used and developed commercially for eliminating seedborne Cmm on infected tomato seeds.

For further information regarding this published journal, please contact: Prof. Sudarsono at email address:

Also read (Baca juga):


About PMB Lab: Prof. Sudarsono

This blog is dedicated as a communication media among alumni associated with PMB Lab, Dept. of Agronomy and Horticulture, Fac. of Agriculture, IPB, Bogor – Indonesia. It contains various information related to alumni activities, PMB Lab’s on going activities and other related matters.
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