About Us | Help Videos | Contact Us | Subscriptions
 

Abstract

 

This article in CS

  1. Vol. 38 No. 2, p. 440-445
     
    Received: May 5, 1997


    * Corresponding author(s): jfry@oz.oznet.ksu.edu
 View
 Download
 Alerts
 Permissions
Request Permissions
 Share

doi:10.2135/cropsci1998.0011183X003800020028x

Assessing Irrigation Management for Its Effects on Disease and Weed Levels in Perennial Ryegrass

  1. Hongfei Jiang,
  2. Jack Fry  and
  3. Ned Tisserat
  1. Dep. of Plant Pathology, Throckmorton Plant Sciences Center, Kansas State Univ., Manhattan, KS 66506

Abstract

Abstract

Irrigation management is generally assumed to have a significant effect on turfgrass pest management, yet little research has been done in this area. This field study was conducted on perennial ryegrass (Lolium perenne L.) maintained under golf course fairway conditions in 1995 and 1996. Objectives were to evaluate water savings afforded by monitoring turf ET and adjusting irrigation accordingly; to compare preventive and curative pesticide control measures for control efficacy and amounts required; and to evaluate effects of two irrigation regimes on turf quality, weed infestation, disease incidence, and pesticide requirements. Turf received either daily irrigation of 7.6 mm of water regardless of prevailing weather conditions or irrigation to replace approximately 80% of atmometer-estimated evapotranspiration (ET) on 3 d weekly. About 200% more water was applied to daffy irrigated turf than to turf irrigated based on atmometer-estimated ET. Similar amounts of active ingredient were used on both fungicide schedules in 1995. In 1996, a curative fungicide schedule resulted in application of 64% less active ingredient than a preventive schedule. Daily irrigation suppressed brown patch (Rhizoctonia solani Kühn) injury by 9% in 1995 and 2% in 1996 but resulted in more than twice as many dollar spot (Sclerotinia homoeocarpa F.T. Bennett) infection centers in 1996. Irrigation treatment had no effect on smooth crabgrass [Digitaria ischaemum (Schreb.) Muhl.] or dandelion (Taraxacum officihale Weber) incidence.

Contribution no. 97-431-J from the Kansas Agric. Exp. Stn.

  Please view the pdf by using the Full Text (PDF) link under 'View' to the left.

Copyright © .