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Biological Control of Potato Bacterial Wilt (Ralstonia solanacearum) Using Selected Plant Extracts

Marie Chantal Mutimawurugo
Marie Chantal Mutimawurugo
, 
Joshua Otieno Ogweno
Joshua Otieno Ogweno
, 
Nyokabi Isabel Wagara
Nyokabi Isabel Wagara
, 
Jean Baptiste Muhinyuza
Jean Baptiste Muhinyuza
, 
Sylvestre Habimana
Sylvestre Habimana
 und 
Alphonsine Mukamuhirwa
Alphonsine Mukamuhirwa
   | 23. Dez. 2023
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Online veröffentlicht: 23. Dez. 2023
Seitenbereich: 129 - 140
Eingereicht: 01. Juni 2023
Akzeptiert: 01. Sept. 2023
DOI: https://doi.org/10.2478/johr-2023-0031
Schlüsselwörter
© 2023 Marie Chantal Mutimawurugo et al., published by Sciendo
This work is licensed under the Creative Commons Attribution 4.0 International License.

Figure 1.

Biological control efficacy – BCE (%) of plant extracts against bacterial wilt in potato plants in seasons A and B 2021 on various days after extract injection – DAIBCE = [(DInegative control − DItreatment)/DInegative control] × 100; negative control – 1% DMSO, positive control – 2% copper oxychloride; values with the same letter in the same season and measurement term are not significantly different at p ≤ 0.05, according to Tukey’s test; error bars represent the standard deviation
Biological control efficacy – BCE (%) of plant extracts against bacterial wilt in potato plants in seasons A and B 2021 on various days after extract injection – DAIBCE = [(DInegative control − DItreatment)/DInegative control] × 100; negative control – 1% DMSO, positive control – 2% copper oxychloride; values with the same letter in the same season and measurement term are not significantly different at p ≤ 0.05, according to Tukey’s test; error bars represent the standard deviation

Figure 2.

Biological control efficacy – BCE (%) of application frequencies against bacterial wilt in potato plants in seasons A and B 2021 on various days after extract injection – DAINote: see Figure 1
Biological control efficacy – BCE (%) of application frequencies against bacterial wilt in potato plants in seasons A and B 2021 on various days after extract injection – DAINote: see Figure 1

Figure 3.

Biological control efficacy – BCE (%) of solvent extracts against bacterial wilt in potato plants in seasons A and B 2021 on various days after extract injection – DAINote: see Figure 1
Biological control efficacy – BCE (%) of solvent extracts against bacterial wilt in potato plants in seasons A and B 2021 on various days after extract injection – DAINote: see Figure 1

Figure 4.

Biological control efficacy – BCE (%) of plant extracts against bacterial wilt in potato tubers in seasons A and B 2021Note: see Figure 1
Biological control efficacy – BCE (%) of plant extracts against bacterial wilt in potato tubers in seasons A and B 2021Note: see Figure 1

Figure 5.

Biological control efficacy – BCE (%) of application frequencies against bacterial wilt in potato tubers in seasons A and B 2021Note: see Figure 1
Biological control efficacy – BCE (%) of application frequencies against bacterial wilt in potato tubers in seasons A and B 2021Note: see Figure 1

Figure 6.

Biological control efficacy – BCE (%) of solvent extracts against bacterial wilt in potato tubers in seasons A and B 2021Note: see Figure 1
Biological control efficacy – BCE (%) of solvent extracts against bacterial wilt in potato tubers in seasons A and B 2021Note: see Figure 1

Figure 7.

Effect of plant extracts on potato tuber postharvest infection – PHI and postharvest yield losses – PHL caused by Ralstonia solanacearum in seasons A and B 2021Note: see Figure 1
Effect of plant extracts on potato tuber postharvest infection – PHI and postharvest yield losses – PHL caused by Ralstonia solanacearum in seasons A and B 2021Note: see Figure 1

Figure 8.

Effect of application frequency of plant extracts on potato tuber postharvest infection – PHI (%) and postharvest yield losses – PHL (%) caused by Ralstonia solanacearum in seasons A and B 2021Note: see Figure 1
Effect of application frequency of plant extracts on potato tuber postharvest infection – PHI (%) and postharvest yield losses – PHL (%) caused by Ralstonia solanacearum in seasons A and B 2021Note: see Figure 1

Figure 9.

Effect of solvent extracts on potato tuber postharvest infection – PHI (%) and postharvest yield losses – PHL (%) caused by Ralstonia solanacearum in seasons A and B 2021Note: see Figure 1
Effect of solvent extracts on potato tuber postharvest infection – PHI (%) and postharvest yield losses – PHL (%) caused by Ralstonia solanacearum in seasons A and B 2021Note: see Figure 1

Data of interaction between tested factors in biological control efficacy – BCE (%) in potato plants (20, 30, 40, and 50 days after extract injection) in field experiments

Days after extract injection Source DF Type III SS Mean square F value Pr > F
20 PE*SE 2 92.49032 46.24516 0.15 0.8626 NS
PE*AF 4 790.37197 197.59299 0.63 0.6406 NS
PE*SE*AF 6 676.62616 112.77103 0.36 0.9009 NS
S*PE*SE*AF 10 1020.98406 102.09841 0.33 0.9711 NS
30 PE*SE 2 325.99244 162.99622 0.75 0.4757 NS
PE*AF 4 443.41670 110.85417 0.51 0.7281 NS
PE*SE*AF 6 392.06478 65.34413 0.30 0.9344 NS
S*PE*SE*AF 10 799.36027 79.93603 0.37 0.9563 NS
40 PE*SE 2 174.563529 87.281764 0.70 0.4986 NS
PE*AF 4 175.900395 43.975099 0.35 0.8403 NS
PE*SE*AF 6 743.200583 45.490298 0.37 0.6946 NS
S*PE*SE*AF 10 1303.711089 130.371109 1.05 0.4123 NS
50 PE*SE 2 193.051781 96.525890 0.60 0.5521 NS
PE*AF 4 293.033093 73.258273 0.45 0.7686 NS
PE*SE*AF 6 632.939955 105.489992 0.65 0.6861 NS
S*PE*SE*AF 10 989.792491 98.979249 0.61 0.7965 NS
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