Effect of doses of fungicides and plant resistance activators on the control of Rhizoctonia foliar blight of soybean, and on Rhizoctonia solani AG1–IA in vitro development
Rhizoctonia foliar blight (RFB) of soybean [ Glycine max (L.) Merrill] occurs in many tropical and subtropical regions, causing yield reductions of up to 70% and in Brazil, up to 60%. The disease is caused by Rhizoctonia solani AG1–IA and AG1–IB, and by AG2–3 in Japan. RFB occurs in the North, North...
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| Veröffentlicht in: | Crop protection 2006-08, Vol.25 (8), p.848-854 |
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| creator | Meyer, Maurício C. Bueno, César J. de Souza, Nilton L. Yorinori, José T. |
| description | Rhizoctonia foliar blight (RFB) of soybean [
Glycine max (L.) Merrill] occurs in many tropical and subtropical regions, causing yield reductions of up to 70% and in Brazil, up to 60%. The disease is caused by
Rhizoctonia solani AG1–IA and AG1–IB, and by AG2–3 in Japan. RFB occurs in the North, Northeast and Mid-west regions of Brazil. Chemical control remains the only effective method of controlling RFB, but its efficiency depends upon environmental conditions. In this study, 18 fungicides, salicylic acid (SA) and acibenzolar-
s-methyl (ASM) were evaluated on
R. solani AG1–IA in vitro, by mycelial growth rating and estimating effective concentration for 50% (EC 50) and 90% (EC 90) inhibition of mycelial growth, and in vivo by reduction of disease severity on soybean plants in greenhouse conditions. Mycelial growth was strongly inhibited by the fungicides pyraclostrobin+boscalid and fludioxonil. Preventive fungicide applications were the most effective. Strobilurins were more efficient both in preventive and curative applications. Best results with plant resistance activators were obtained with SA (2.5
mM) sprayed at 20
d before inoculation and with ASM (12.5
mg
a.i.
l
−1) 10
d before inoculation. |
| doi_str_mv | 10.1016/j.cropro.2005.11.008 |
| format | Article |
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Glycine max (L.) Merrill] occurs in many tropical and subtropical regions, causing yield reductions of up to 70% and in Brazil, up to 60%. The disease is caused by
Rhizoctonia solani AG1–IA and AG1–IB, and by AG2–3 in Japan. RFB occurs in the North, Northeast and Mid-west regions of Brazil. Chemical control remains the only effective method of controlling RFB, but its efficiency depends upon environmental conditions. In this study, 18 fungicides, salicylic acid (SA) and acibenzolar-
s-methyl (ASM) were evaluated on
R. solani AG1–IA in vitro, by mycelial growth rating and estimating effective concentration for 50% (EC 50) and 90% (EC 90) inhibition of mycelial growth, and in vivo by reduction of disease severity on soybean plants in greenhouse conditions. Mycelial growth was strongly inhibited by the fungicides pyraclostrobin+boscalid and fludioxonil. Preventive fungicide applications were the most effective. Strobilurins were more efficient both in preventive and curative applications. Best results with plant resistance activators were obtained with SA (2.5
mM) sprayed at 20
d before inoculation and with ASM (12.5
mg
a.i.
l
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Glycine max (L.) Merrill] occurs in many tropical and subtropical regions, causing yield reductions of up to 70% and in Brazil, up to 60%. The disease is caused by
Rhizoctonia solani AG1–IA and AG1–IB, and by AG2–3 in Japan. RFB occurs in the North, Northeast and Mid-west regions of Brazil. Chemical control remains the only effective method of controlling RFB, but its efficiency depends upon environmental conditions. In this study, 18 fungicides, salicylic acid (SA) and acibenzolar-
s-methyl (ASM) were evaluated on
R. solani AG1–IA in vitro, by mycelial growth rating and estimating effective concentration for 50% (EC 50) and 90% (EC 90) inhibition of mycelial growth, and in vivo by reduction of disease severity on soybean plants in greenhouse conditions. Mycelial growth was strongly inhibited by the fungicides pyraclostrobin+boscalid and fludioxonil. Preventive fungicide applications were the most effective. Strobilurins were more efficient both in preventive and curative applications. Best results with plant resistance activators were obtained with SA (2.5
mM) sprayed at 20
d before inoculation and with ASM (12.5
mg
a.i.
l
−1) 10
d before inoculation.</description><subject>application rate</subject><subject>Chemical control</subject><subject>disease resistance</subject><subject>dose response</subject><subject>effective concentration 50</subject><subject>foliar diseases</subject><subject>fungal diseases of plants</subject><subject>fungicides</subject><subject>Glycine max</subject><subject>leaf blight</subject><subject>mycelium</subject><subject>plant growth</subject><subject>Resistance induction</subject><subject>Rhizoctonia solani</subject><subject>Soybean disease</subject><subject>soybeans</subject><issn>0261-2194</issn><issn>1873-6904</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2006</creationdate><recordtype>article</recordtype><recordid>eNp9kc1uEzEUhUcIJELhDZDwihUz3GtPPNMNUlSVUqkSEtC15d_E0cQOthOpXfEOPAcv1Sep02HBipVt6TvnXp_TNG8ROgTkH7edTnGfYkcBlh1iBzA-axY4Dqzl59A_bxZAObYUz_uXzauctwBAGaOL5s-lc1YXEh0xMdt8urhDWHvtTX3JYMh-kqGQZLPPRQZtidTFH2WJqdKBlI0lOoaS4nQSf9v4-6hLDF4SFycvE1GTX2-eRuR4p6wMH558q_ZfOMc6x5PVFT78-n29Ij6Qo6-uxNijneJ-Z0N53bxwcsr2zd_zrLn9fPnj4kt78_Xq-mJ102rGsbTGcMMGJY02rJdSjXbgSJWhvRyAG8WWo-Eol67SziFIJzUf1ahQKXAjY2fN-9m3hvrzYHMRO5-1neqGNh6ywKEmDT2tYD-DtYCck3Vin_xOpjuBIE7diK2YuxGnbgSiqN1U2btZ5mQUcp18FrffKSADROg59JX4NBO2fvPobRJZe1vTNz7VvoSJ_v8jHgGke6h8</recordid><startdate>20060801</startdate><enddate>20060801</enddate><creator>Meyer, Maurício C.</creator><creator>Bueno, César J.</creator><creator>de Souza, Nilton L.</creator><creator>Yorinori, José T.</creator><general>Elsevier Ltd</general><scope>FBQ</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7T7</scope><scope>8FD</scope><scope>C1K</scope><scope>FR3</scope><scope>P64</scope></search><sort><creationdate>20060801</creationdate><title>Effect of doses of fungicides and plant resistance activators on the control of Rhizoctonia foliar blight of soybean, and on Rhizoctonia solani AG1–IA in vitro development</title><author>Meyer, Maurício C. ; Bueno, César J. ; de Souza, Nilton L. ; Yorinori, José T.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c361t-dd6d37badcd34aab8e7612bd24a706db358d61a5f361ff10afac68b8b1bb0f833</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2006</creationdate><topic>application rate</topic><topic>Chemical control</topic><topic>disease resistance</topic><topic>dose response</topic><topic>effective concentration 50</topic><topic>foliar diseases</topic><topic>fungal diseases of plants</topic><topic>fungicides</topic><topic>Glycine max</topic><topic>leaf blight</topic><topic>mycelium</topic><topic>plant growth</topic><topic>Resistance induction</topic><topic>Rhizoctonia solani</topic><topic>Soybean disease</topic><topic>soybeans</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Meyer, Maurício C.</creatorcontrib><creatorcontrib>Bueno, César J.</creatorcontrib><creatorcontrib>de Souza, Nilton L.</creatorcontrib><creatorcontrib>Yorinori, José T.</creatorcontrib><collection>AGRIS</collection><collection>CrossRef</collection><collection>Industrial and Applied Microbiology Abstracts (Microbiology A)</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Engineering Research Database</collection><collection>Biotechnology and BioEngineering Abstracts</collection><jtitle>Crop protection</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Meyer, Maurício C.</au><au>Bueno, César J.</au><au>de Souza, Nilton L.</au><au>Yorinori, José T.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effect of doses of fungicides and plant resistance activators on the control of Rhizoctonia foliar blight of soybean, and on Rhizoctonia solani AG1–IA in vitro development</atitle><jtitle>Crop protection</jtitle><date>2006-08-01</date><risdate>2006</risdate><volume>25</volume><issue>8</issue><spage>848</spage><epage>854</epage><pages>848-854</pages><issn>0261-2194</issn><eissn>1873-6904</eissn><abstract>Rhizoctonia foliar blight (RFB) of soybean [
Glycine max (L.) Merrill] occurs in many tropical and subtropical regions, causing yield reductions of up to 70% and in Brazil, up to 60%. The disease is caused by
Rhizoctonia solani AG1–IA and AG1–IB, and by AG2–3 in Japan. RFB occurs in the North, Northeast and Mid-west regions of Brazil. Chemical control remains the only effective method of controlling RFB, but its efficiency depends upon environmental conditions. In this study, 18 fungicides, salicylic acid (SA) and acibenzolar-
s-methyl (ASM) were evaluated on
R. solani AG1–IA in vitro, by mycelial growth rating and estimating effective concentration for 50% (EC 50) and 90% (EC 90) inhibition of mycelial growth, and in vivo by reduction of disease severity on soybean plants in greenhouse conditions. Mycelial growth was strongly inhibited by the fungicides pyraclostrobin+boscalid and fludioxonil. Preventive fungicide applications were the most effective. Strobilurins were more efficient both in preventive and curative applications. Best results with plant resistance activators were obtained with SA (2.5
mM) sprayed at 20
d before inoculation and with ASM (12.5
mg
a.i.
l
−1) 10
d before inoculation.</abstract><pub>Elsevier Ltd</pub><doi>10.1016/j.cropro.2005.11.008</doi><tpages>7</tpages></addata></record> |
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| ispartof | Crop protection, 2006-08, Vol.25 (8), p.848-854 |
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| source | Elsevier ScienceDirect Journals |
| subjects | application rate Chemical control disease resistance dose response effective concentration 50 foliar diseases fungal diseases of plants fungicides Glycine max leaf blight mycelium plant growth Resistance induction Rhizoctonia solani Soybean disease soybeans |
| title | Effect of doses of fungicides and plant resistance activators on the control of Rhizoctonia foliar blight of soybean, and on Rhizoctonia solani AG1–IA in vitro development |
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