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Effect of Botanical Extracts: A Potential Biocontrol Agent for Xanthomonas Oryzae Pv. Oryzae, Causing Bacterial Leaf Blight Disease of Rice

Effect of Botanical Extracts: A Potential Biocontrol Agent for Xanthomonas Oryzae Pv. Oryzae, Causing Bacterial Leaf Blight Disease of Rice

Syed Atif Hasan Naqvi1*, Ummad-ud-Din Umar1, Ammarah Hasnain2, Ateeq ur Rehman1 and Rashida Perveen1 

1Department of Plant Pathology, Bahauddin Zakariya University, Multan, Pakistan, 2Biological Science Department, Forman Christian College University, Lahore, Pakistan.

atifhasanshah@hotmail.com  

Eq 1
Figure 1

In vitro inhibition of Xanthomonas oryzae pv. oryzae on nutrient agar under the effect of various plant extracts by poison food technique. While T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, C1, C2 shows Mentha Piperita, Piper nigrum, Capsicum annuum, Syzygium cumini, Azadiraehta indica, Moringa oleifera, Citrus limon, Prosopis juliflora, Syzygium aromaticum, Saraca Asoca, Curcuma longa, Mangifera indica, Cinnamomum zeylanicum, Aloe vera, Opuntia ficus-indica, Aloe vera + Opuntia ficus-indica, Aloe vera + Mentha Piperita, Opuntia ficus-indica + Mentha Piperita, Mentha Piperita + Azadiraehta indica + Citrus limon, Moringa oleifera + Mentha Piperita, and Control – ive (Water) , Control + ive (Streptomycin). 

Figure 2

In vitro inhibition of Xanthomonas oryzae pv. oryzae on nutrient agar under the effect of various plant extracts by Disk diffusion technique. While T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16, T17, T18, T19, T20, C1 and C2, shows Mentha Piperita, Piper nigrum, Capsicum annuum, Syzygium cumini, Azadiraehta indica, Moringa oleifera, Citrus limon, Prosopis juliflora, Syzygium aromaticum, Saraca Asoca, Curcuma longa, Mangifera indica, Cinnamomum zeylanicum, Aloe vera, Opuntia ficus-indica, Aloe vera + Opuntia ficus-indica, Aloe vera + Mentha Piperita, Opuntia ficus-indica + Mentha Piperita, Mentha Piperita + Azadiraehta indica + Citrus limon, Moringa oleifera + Mentha Piperita, and Control – ive (Water) , Control + ive (Streptomycin) 

Figure 3

Effect of various botanicals singly or in combination with others for the suppression of bacterial leaf bight of rice in the green house on three highly susceptible cultivars. (A), Basmati super (B), IRRI-24 (C), TN1, while T1, T2, T3, T4, T5, T6 and T7 shows Mentha piperita, Opuntia ficus indica, Aloe vera, Azadirachta indica, Aloe vera + Mentha piperita, Opuntia ficus indica + Mentha piperita, Mentha piperita + Azadirachta indica + Citrus limon respectively. Wherein Control shows untreated plants. 

Figure 4

Effect of various botanicals singly or in combination with others for the suppression of bacterial leaf bight of rice in the field on three highly susceptible cultivars. (A), Basmati super (B), IRRI-24 (C), TN1, while T1, T2, T3, T4, T5, T6 and T7 shows Mentha piperita, Opuntia ficus indica, Aloe vera, Azadirachta indica, Aloe vera + Mentha piperita, Opuntia ficus indica + Mentha piperita, Mentha piperita + Azadirachta indica + Citrus limon respectively. Wherein Control 1 (Inoculated + Treated with streptomycin), Control 2 (Inoculated + Water) and Control 3 are (Uninoculated + Untreated). 

Figure 5

Yield data of three rice cultivars under the effect of various treatments viz., T1, T2, T3, T4, T5, T6, T7, CI, C2 and C3 showing Mentha Piperita, Opuntia ficus-indica, Aloe vera, Azadiraehta indica, Aloe vera + Mentha Piperita, Opuntia ficus-indica + Mentha Piperita, Mentha Piperita + Azadiraehta indica + Citrus limon respectively whereas C1 (Inoculated + Treated with streptomycin), C2 (Inoculated + Treated with Water) and C3 (Uninoculated + Untreated) respectively. A= Plant height, B= No of tillers, C= Panicle length, D= No of grains/ panicle, E= 500 grains weight in grams and F= Paddy yield (t/ha) respectively. 

Pakistan Journal of Agricultural Research

March

Vol. 32, Iss. 1, Pages 1-217

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