Persistent Link:
http://hdl.handle.net/10150/220002
Title:
Effect of Cultivar and Actigard on Development of Powdery Mildew on Lettuce
Author:
Matheron, Michael E.; Porchas, Martin
Issue Date:
Aug-2000
Publisher:
College of Agriculture, University of Arizona (Tucson, AZ)
Journal:
Vegetable: A College of Agriculture Report
Abstract:
Nine 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.
Keywords:
Agriculture -- Arizona; Vegetables -- Arizona; Cotton -- Plant pathogens
Series/Report no.:
AZ1177; Series P-122

Full metadata record

DC FieldValue Language
dc.titleEffect of Cultivar and Actigard on Development of Powdery Mildew on Lettuceen_US
dc.contributor.authorMatheron, Michael E.en_US
dc.contributor.authorPorchas, Martinen_US
dc.date.issued2000-08-
dc.publisherCollege of Agriculture, University of Arizona (Tucson, AZ)en_US
dc.identifier.journalVegetable: A College of Agriculture Reporten_US
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.en_US
dc.subjectAgriculture -- Arizonaen_US
dc.subjectVegetables -- Arizonaen_US
dc.subjectCotton -- Plant pathogensen_US
dc.identifier.urihttp://hdl.handle.net/10150/220002-
dc.relation.ispartofseriesAZ1177en_US
dc.relation.ispartofseriesSeries P-122en_US
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