บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Lack of effect of stone fruit rust on yield of French prune trees and survival of urediniospores of the pathogen on leaves, shoots, and buds.

Teviotdale, B. L.; Harper, D. M.; Michailides, T. J.; Sibbett, G. S.;

Plant Disease Year: 1994 Vol: 78 Issue: 2 Pages: 141-145 Ref: 25 ref.

1994

บทคัดย่อ

Lack of effect of stone fruit rust on yield of French prune trees and survival of urediniospores of the pathogen on leaves, shoots, and buds.

ABSTRACT :

 

Two prune orchards, 1 in Tulare County and 1 in Yuba County, California, USA, were treated either 2 or 3 times in summer with mancozeb or sulfur or left untreated for 3 yr. Fresh and dry fruit weights/tree, number of dry prunes/kg, FW to DW ratio and percentage soluble solids were determined each year. Significant differences in yield parameters were few, minor and inconsistent. Preharvest defoliation did not occur in either orchard in any year, but postharvest leaf loss was faster and leaf infection by Tranzschelia discolor greater in control and sulfur than in mancozeb treatments. The number of urediospores on buds declined from Nov. to Feb., and the number on 1- and 2-yr-old shoots declined from Nov. to Apr. Viable urediospores were detected on shoots in Apr. of 2 yr and in May of 1 yr and on fallen leaves in May of both years.