Evaluation of Products to Manage Sclerotinia Leaf Drop of Lettuce in 2003
Sclerotinia leaf drop in Arizona is caused by two soil-borne fungi, Sclerotinia minor and S. sclerotiorum. Moist soil and moderate temperature favor this disease. Some registered products as well as new chemistries in development were evaluated for control of leaf drop on lettuce during the winter v...
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College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ)
2003
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ndltd-arizona.edu-oai-arizona.openrepository.com-10150-2149712015-10-23T04:51:39Z Evaluation of Products to Manage Sclerotinia Leaf Drop of Lettuce in 2003 Matheron, Michael E. Porchas, Martin Byrne, David N. Baciewicz, Patti Agriculture -- Arizona Vegetables -- Arizona Vegetables -- Plant pathogens Sclerotinia leaf drop in Arizona is caused by two soil-borne fungi, Sclerotinia minor and S. sclerotiorum. Moist soil and moderate temperature favor this disease. Some registered products as well as new chemistries in development were evaluated for control of leaf drop on lettuce during the winter vegetable growing season in 2002-2003. Sclerotia of each pathogen were applied to plots after lettuce thinning and just before the first application of test compounds. In plots infested with Sclerotinia minor, all materials tested at an appropriate rate significantly reduced disease. The best treatments included an application of Contans followed by an application of Endura (BAS 510), as well as two applications of an experimental compound or the standard materials Ronilan and Rovral. Other useful products included Endura, Serenade, Pristine (BAS 516), Botran, Switch and Contans. In plots infested with S. sclerotiorum, two applications of Contans provided the best level of disease reduction among tested materials. Three applications of Endura or Pristine also were very efficacious. Other compounds that provided some reduction in disease caused by S. sclerotiorum included Botran, Serenade and Switch. Two of the products tested, Contans and Serenade, are biological control materials. For a valid comparison of products for control of Sclerotinia drop of lettuce, it is important to compare the results obtained from more than one field study. The reader is urged to review previous studies in addition to this report to get a true picture of the relative efficacy of tested compounds for control of Sclerotinia drop. 2003-08 text Article http://hdl.handle.net/10150/214971 Vegetable Report en_US AZ1323 Series P-136 College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ) |
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Agriculture -- Arizona Vegetables -- Arizona Vegetables -- Plant pathogens |
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Agriculture -- Arizona Vegetables -- Arizona Vegetables -- Plant pathogens Matheron, Michael E. Porchas, Martin Evaluation of Products to Manage Sclerotinia Leaf Drop of Lettuce in 2003 |
description |
Sclerotinia leaf drop in Arizona is caused by two soil-borne fungi, Sclerotinia minor and S. sclerotiorum. Moist soil and moderate temperature favor this disease. Some registered products as well as new chemistries in development were evaluated for control of leaf drop on lettuce during the winter vegetable growing season in 2002-2003. Sclerotia of each pathogen were applied to plots after lettuce thinning and just before the first application of test compounds. In plots infested with Sclerotinia minor, all materials tested at an appropriate rate significantly reduced disease. The best treatments included an application of Contans followed by an application of Endura (BAS 510), as well as two applications of an experimental compound or the standard materials Ronilan and Rovral. Other useful products included Endura, Serenade, Pristine (BAS 516), Botran, Switch and Contans. In plots infested with S. sclerotiorum, two applications of Contans provided the best level of disease reduction among tested materials. Three applications of Endura or Pristine also were very efficacious. Other compounds that provided some reduction in disease caused by S. sclerotiorum included Botran, Serenade and Switch. Two of the products tested, Contans and Serenade, are biological control materials. For a valid comparison of products for control of Sclerotinia drop of lettuce, it is important to compare the results obtained from more than one field study. The reader is urged to review previous studies in addition to this report to get a true picture of the relative efficacy of tested compounds for control of Sclerotinia drop. |
author2 |
Byrne, David N. |
author_facet |
Byrne, David N. Matheron, Michael E. Porchas, Martin |
author |
Matheron, Michael E. Porchas, Martin |
author_sort |
Matheron, Michael E. |
title |
Evaluation of Products to Manage Sclerotinia Leaf Drop of Lettuce in 2003 |
title_short |
Evaluation of Products to Manage Sclerotinia Leaf Drop of Lettuce in 2003 |
title_full |
Evaluation of Products to Manage Sclerotinia Leaf Drop of Lettuce in 2003 |
title_fullStr |
Evaluation of Products to Manage Sclerotinia Leaf Drop of Lettuce in 2003 |
title_full_unstemmed |
Evaluation of Products to Manage Sclerotinia Leaf Drop of Lettuce in 2003 |
title_sort |
evaluation of products to manage sclerotinia leaf drop of lettuce in 2003 |
publisher |
College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ) |
publishDate |
2003 |
url |
http://hdl.handle.net/10150/214971 |
work_keys_str_mv |
AT matheronmichaele evaluationofproductstomanagesclerotinialeafdropoflettucein2003 AT porchasmartin evaluationofproductstomanagesclerotinialeafdropoflettucein2003 |
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