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Use of benzothiadiazole (BTH) for inducing systemic resistance in cotton seedlings against some soil-borne pathogenic fungi [electronic resource].

By:

EI-Samawaty, A.M.A

Contributor(s):

Galal, A.A

Language: English Summary language: Arabic Description: p.3305-3315Other title:

أستخدام البنزوثياديازول لتحفيز المقاومة الجهازية في بادرات القطن ضد بعض فطريات التربة الممرضة [Added title page title]

Uniform titles:

Mansoura university journal of agricultural sciences, 2009 v. 34 (4) Part B [electronic resource].

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In: Mansoura University Journal of Agricultural Sciences 2009.v.34(4)Part BSummary: The resistance elicitor 8enzothiadiazole (8TH) has no significant inhibitory effects on seed germination of cotton cultivars Giza 86 and Giza 90 or on mycelial growth of the tested fungi, i.e. Fusarium solani, F. oxysporum, F. moniliforme, Sclerotium rolfsii, Macrophomina phaseolina, Pythium sp. and Rhizoctonia solani. 8TH seed treatment (seed soaking) resuited in resistant cotton plants against infection by all pathogenic fungi tested. Efficiency of BTH to induce resistance in cotton seedlings varied with BTH concentration and fungi tested. Increasing BTH concentration enhanced resistance capacity of cotton cultivars. In addition. When the concentration was increased to 100 ppm, BTH significantly increased plant height from 8.36 to 26.07 % and from 8.93 to 28.82 % for cvs. Giza 86 and Giza 90, respectively. Also, it increased dry weight from 2.87 to 53.26 % and from 9.85 to 31.16 % for cvs. Giza 86 and Giza 90, respectively. The highest efficiency value (60%) was achieved by BTH against F. oxysporum on Giza 86 and F. moniliforme on Giza 90 while the least efficiency was observed by BTH seed treated against Rhizoctonia so/ani infection. Since 50 ppm of BTH seed treatment caused 18.18 and 21.49% protection in cotton seedlings of cvs. Giza 86 and Giza 90, respectively. Using 100ppm of BTH gave cotton seedlings with 31.81 and 25.62 % protection for Giza 86 and Giza 90, respectively.

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The resistance elicitor 8enzothiadiazole (8TH) has no significant inhibitory effects on seed germination of cotton cultivars Giza 86 and Giza 90 or on mycelial growth of the tested fungi, i.e. Fusarium solani, F. oxysporum, F. moniliforme, Sclerotium rolfsii, Macrophomina phaseolina, Pythium sp. and Rhizoctonia solani. 8TH seed treatment (seed soaking) resuited in resistant cotton plants against infection by all pathogenic fungi tested. Efficiency of BTH to induce resistance in cotton seedlings varied with BTH concentration and fungi tested. Increasing BTH concentration enhanced resistance capacity of cotton cultivars. In addition. When the concentration was increased to 100 ppm, BTH significantly increased plant height from 8.36 to 26.07 % and from 8.93 to 28.82 % for cvs. Giza 86 and Giza 90, respectively. Also, it increased dry weight from 2.87 to 53.26 % and from 9.85 to 31.16 % for cvs. Giza 86 and Giza 90, respectively. The highest efficiency value (60%) was achieved by BTH against F. oxysporum on Giza 86 and F. moniliforme on Giza 90 while the least efficiency was observed by BTH seed treated against Rhizoctonia so/ani infection. Since 50 ppm of BTH seed treatment caused 18.18 and 21.49% protection in cotton seedlings of cvs. Giza 86 and Giza 90, respectively. Using 100ppm of BTH gave cotton seedlings with 31.81 and 25.62 % protection for Giza 86 and Giza 90, respectively.

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