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United States Department of Agriculture (USDA) 2005

EFFECT OF TIME OF WET PERIOD FROM SPRINKLER IRRIGATION ON LATE BLIGHT DEVELOPMENT AND SPORANGIA RELEASE IN SEMIARID ENVIRONMENTS

Sprinkler Irrigation Semi-Arid

Research, Education & Economics Information System (REEIS)

Titre : EFFECT OF TIME OF WET PERIOD FROM SPRINKLER IRRIGATION ON LATE BLIGHT DEVELOPMENT AND SPORANGIA RELEASE IN SEMIARID ENVIRONMENTS

Identification : 0500-00042-001-76G

Pays : Etats Unis

Durée : Mar 28, 2005 à Mar 27, 2006

Domaine : Drainage and Irrigation Systems and Facilities ; 212 - Pathogens and Nematodes Affecting Plants

Partenaire : WASHINGTON STATE UNIVERSITY 240 FRENCH ADMINISTRATION BLDG PULLMAN,WA

Objectif  : Quantify late blight development and release of sporangia from infected foliage when potato plants are sprinkler irrigated at various time periods.

Descriptif
A linear irrigation system modified to differentially water research plots will be used to sprinkler irrigation plots of cultivar Ranger Russet near Bonners Ferry, ID. Potatoes will be grown using standard practices. Size of plots will be approximately 15.2 x 15.2 m. A 10m buffer area of potatoes treated with fungicide will surround each plot to reduce plot interference. Timing of irrigation application will be within an hour of 0600, 1200, and 1800 hours. Plots will be irrigated with 19 mm of water 3 times each week. Irrigation will be modified depending of crop canopy and weather. Time of irrigation applications will be arranged in a random complete block design with three replicates. Temperature, total moisture, and duration of wet period within the potato canopy, and soil moisture of each plot will be monitored with Watch Dog devises. Water Mark soil devises will be used to measure water potential of soil, and rain gages will be used to measure total moisture. Border rows of Cultivar Ranger Russet adjacent to plots will be artificially inoculated with an US-8 isolate of P. infestans within a few days after row closure. Airborne sporangia will be quantified in the center of a plot of the three timing irrigation treatments with Rotorod Model 20 traps at selected times. A fourth trap will be placed about 30 m downwind from the plots to detect background levels of airborne sporangia. Late blight incidence and severity will be recorded weekly and incidence of tuber rot will be determined at harvest. Tuber yield will be measured

Présentation : USDA

Page publiée le 14 septembre 2015, mise à jour le 2 novembre 2017