Show simple item record

dc.contributor.authorMatheron, Michael E.
dc.contributor.authorPorchas, Martin
dc.contributor.editorByrne, David N.en_US
dc.contributor.editorBaciewicz, Pattien_US
dc.date.accessioned2012-04-23T19:09:44Z
dc.date.available2012-04-23T19:09:44Z
dc.date.issued2000-08
dc.identifier.urihttp://hdl.handle.net/10150/220002
dc.description.abstractNine different cultivars of lettuce were planted at the Yuma Valley Agricultural Center. Plants were treated four times with two different rates of Actigard. Control plants were not treated. Near plant maturity (Mar. 23, 2000) the severity of powdery mildew was recorded. Among nontreated plants, Cibola, Conquistador, and Coolguard had the lowest levels of powdery mildew. On the other hand, Bos 9003 and Mohawk had significantly higher levels of powdery mildew than all other tested cultivars. Four applications of Actigard at a rate of 14 g. of active ingredient per acre significantly reduced the level of powdery mildew on all nine tested cultivars of lettuce. On two lettuce cultivars, powdery mildew was significantly lower when treated with Actigard at the 28 g. a.i./A rate when compared to the 14 g. a.i./A rate. No evidence of phytotoxicity was apparent on plants treated with Actigard. This study suggests that lettuce cultivars differ in susceptibility to powdery mildew. Also, Actigard was able to provide added protection against powdery mildew for all tested lettuce cultivars.
dc.language.isoen_USen_US
dc.publisherCollege of Agriculture, University of Arizona (Tucson, AZ)en_US
dc.relation.ispartofseriesAZ1177en_US
dc.relation.ispartofseriesSeries P-122en_US
dc.subjectAgriculture -- Arizonaen_US
dc.subjectVegetables -- Arizonaen_US
dc.subjectCotton -- Plant pathogensen_US
dc.titleEffect of Cultivar and Actigard on Development of Powdery Mildew on Lettuceen_US
dc.typetext
dc.typeArticle
dc.identifier.journalVegetable: A College of Agriculture Reporten_US
refterms.dateFOA2018-08-20T06:54:50Z
html.description.abstractNine different cultivars of lettuce were planted at the Yuma Valley Agricultural Center. Plants were treated four times with two different rates of Actigard. Control plants were not treated. Near plant maturity (Mar. 23, 2000) the severity of powdery mildew was recorded. Among nontreated plants, Cibola, Conquistador, and Coolguard had the lowest levels of powdery mildew. On the other hand, Bos 9003 and Mohawk had significantly higher levels of powdery mildew than all other tested cultivars. Four applications of Actigard at a rate of 14 g. of active ingredient per acre significantly reduced the level of powdery mildew on all nine tested cultivars of lettuce. On two lettuce cultivars, powdery mildew was significantly lower when treated with Actigard at the 28 g. a.i./A rate when compared to the 14 g. a.i./A rate. No evidence of phytotoxicity was apparent on plants treated with Actigard. This study suggests that lettuce cultivars differ in susceptibility to powdery mildew. Also, Actigard was able to provide added protection against powdery mildew for all tested lettuce cultivars.


Files in this item

Thumbnail
Name:
az1177-2c-2000.pdf
Size:
22.43Kb
Format:
PDF

This item appears in the following Collection(s)

Show simple item record