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Evaluation of pecan scab disease man...

Payne, Andrea F.

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Evaluation of pecan scab disease management strategies to improve orchard production and reduce pesticide inputs.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Evaluation of pecan scab disease management strategies to improve orchard production and reduce pesticide inputs./
Author:	Payne, Andrea F.
Description:	118 p.
Notes:	Source: Masters Abstracts International, Volume: 49-06, page: .
Contained By:	Masters Abstracts International49-06.
Subject:	Agriculture, Horticulture. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1495116
ISBN:	9781124714660

Evaluation of pecan scab disease management strategies to improve orchard production and reduce pesticide inputs.
Payne, Andrea F.

Evaluation of pecan scab disease management strategies to improve orchard production and reduce pesticide inputs. - 118 p.

Source: Masters Abstracts International, Volume: 49-06, page: .

Thesis (M.S.)--Oklahoma State University, 2011.

To facilitate the subsequent studies, initial experiments evaluated growth media best suited for maximizing sporulation of F. effusum in vitro . Additional studies were aimed at improving our understanding of weather conditions that are favorable for pecan scab epidemic initiation and progression in Oklahoma. In addition, influential relative humidity and temperature thresholds in pecan orchards were reevaluated for use in models to predict epidemics of pecan scab. Other biologically significant weather variables were also evaluated for inclusion in an updated advisory. Finally, experiments were conducted to understand the influence of early fungicide treatments in Oklahoma pecan orchards.

ISBN: 9781124714660Subjects--Topical Terms:

1017832
Agriculture, Horticulture.

Evaluation of pecan scab disease management strategies to improve orchard production and reduce pesticide inputs.
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100 1 $a Payne, Andrea F. $3 1685035
245 1 0 $a Evaluation of pecan scab disease management strategies to improve orchard production and reduce pesticide inputs.
300 $a 118 p.
500 $a Source: Masters Abstracts International, Volume: 49-06, page: .
500 $a Adviser: Damon L. Smith.
502 $a Thesis (M.S.)--Oklahoma State University, 2011.
520 $a To facilitate the subsequent studies, initial experiments evaluated growth media best suited for maximizing sporulation of F. effusum in vitro . Additional studies were aimed at improving our understanding of weather conditions that are favorable for pecan scab epidemic initiation and progression in Oklahoma. In addition, influential relative humidity and temperature thresholds in pecan orchards were reevaluated for use in models to predict epidemics of pecan scab. Other biologically significant weather variables were also evaluated for inclusion in an updated advisory. Finally, experiments were conducted to understand the influence of early fungicide treatments in Oklahoma pecan orchards.
520 $a Potato dextrose agar was found to be the best medium for the growth and sporulation of F. effusum. Malt extract agar and potato carrot agar amended with 50% lactic acid were also favorable for the growth and sporulation of F. effusum in vitro. The disease prediction model developed during this study was adjusted for the effects of solar radiation and the accumulation of rain in a dynamic fashion. By doing so, it was evident that the thresholds used by the current advisory closely estimated periods of scab increase, but accuracy might be improved by adding the effects of solar radiation and rain. Furthermore, a new model using dew point and dew point depression was developed. Further validation studies using these models should be performed to identify any improvement in the ability to predict fungicide application. Data from field trials suggest that in Oklahoma growers can use an abbreviated fungicide program, which provides scab control during the early stages of the season and can be relaxed during months of July and August. Considering the increased susceptibility of pecans to damage by pecan scab during early stages of development, this study has demonstrated that fungicide protection be used when conditions are favorable for disease during the early growing season.
590 $a School code: 0664.
650 4 $a Agriculture, Horticulture. $3 1017832
650 4 $a Agriculture, Plant Pathology. $3 1028950
690 $a 0471
690 $a 0480
710 2 $a Oklahoma State University. $b Plant Pathology. $3 1685036
773 0 $t Masters Abstracts International $g 49-06.
790 1 0 $a Smith, Damon L., $e advisor
790 1 0 $a Damicone, John $e committee member
790 1 0 $a Smith, Michael $e committee member
790 $a 0664
791 $a M.S.
792 $a 2011
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1495116