Efficacy of controlling xanthomonas by Psidium guajava methanol crude leaf extracts

Kamaruzaman Sijam, . and Siti Nur Sarah Shafiei, . and Dzolkhifli Omar, . (2011) Efficacy of controlling xanthomonas by Psidium guajava methanol crude leaf extracts. [Proceedings Paper]

The antibacterial activity of Psidium guajava methanol leaf extracts were evaluated against Xanthomonas isolates using the agar well diffusion method. Four different species of Xanthomonas Xanthomonas axonopodis pv. citri Xanthomonas oryzae pv. oryzae Xanthomonas euvesicatoria and Xanthomonas campestris pv. oryzicola were screened. The zone of inhibition at 25 mg/mL concentration ranging from 10-15 mm 50 mg/mL12-17 mm 100 mg/mL 17-20 mm and 200 mg/mL 19-25 mm. The lowest MIC value was recorded at 0.391 mg/mL for X. oryzae pv. oryzae followed by X. euvesicatoria 0.781 mg/mL and the same MIC value recorded for X. axonopodis pv. citri and X. campestris pv. oryzico/a 1.563 mg/mL. For MBC value only X. axonopodis pv. citri recorded the same value as MIC while other species showed higher value compared to the MIC value.

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Abstract

The antibacterial activity of Psidium guajava methanol leaf extracts were evaluated against Xanthomonas isolates using the agar well diffusion method. Four different species of Xanthomonas Xanthomonas axonopodis pv. citri Xanthomonas oryzae pv. oryzae Xanthomonas euvesicatoria and Xanthomonas campestris pv. oryzicola were screened. The zone of inhibition at 25 mg/mL concentration ranging from 10-15 mm 50 mg/mL12-17 mm 100 mg/mL 17-20 mm and 200 mg/mL 19-25 mm. The lowest MIC value was recorded at 0.391 mg/mL for X. oryzae pv. oryzae followed by X. euvesicatoria 0.781 mg/mL and the same MIC value recorded for X. axonopodis pv. citri and X. campestris pv. oryzico/a 1.563 mg/mL. For MBC value only X. axonopodis pv. citri recorded the same value as MIC while other species showed higher value compared to the MIC value.

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Item Type:	Proceedings Paper
Additional Information:	Available at Perpustakaan Sultan Abdul Samad Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia. QR22 M3I61 2011 vol.2 Call Number
AGROVOC Term:	Psidium guajava
AGROVOC Term:	Myrtaceae
AGROVOC Term:	Guavas
AGROVOC Term:	Xanthomonas
AGROVOC Term:	Xanthomonas oryzae
AGROVOC Term:	Xanthomonas campestris
AGROVOC Term:	Gram negative bacteria
AGROVOC Term:	Plant diseases
AGROVOC Term:	Antibacterial properties
AGROVOC Term:	Diffusion
Geographical Term:	MALAYSIA
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 05:15
URI:	http://webagris.upm.edu.my/id/eprint/12988

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