New Zealand Journal of Crop and Horticultural Science abstracts

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Chemical and cultural control of bacterial blossom blight of kiwifruit caused by Pseudomonas syringae in Korea

YOUNG JIN KOH
DONG HYUN LEE

Department of Applied Biology
College of Agriculture and Life Sciences
Sunchon National University
Sunchon 540-742, Korea
email: youngjin@sunchon.ac.kr

JONG SUP SHIN

Yeosusi Agricultural Development
 and Technology Center
Yeosu 555-130, Korea

JAE-SEOUN HUR

Department of Environmental Education
College of Education
Sunchon National University
Sunchon 540-742, Korea

Abstract  Disease incidence of bacterial blossom blight (Pseudomonas syringae van Hall) ranged from 13.0 to 36.2% in naturally infected kiwifruit (Actinidia deliciosa (A. Chev) C. F. Liang et A. R. Ferguson) orchards of the major kiwifruit-growing areas in Korea from 1997 to 1999. A significant correlation occurred between disease incidence and rainfall at flowering. Several control practices were compared with conventional chemical control to prevent bacterial blossom blight of kiwifruit. Streptomycin sulfate + oxytetracycline WP applied 3 times at 10-day intervals resulted in control efficiencies from 75.6 to 79.8% in 1997 and 1998, respectively. Trunk injection of various concentrations of acetic acid also displayed variable control efficiencies. Injection with 7% (v/v) acetic acid was the best injection treatment with control efficiencies from 70.9 to 77.0%. Use of a transparent polyvinyl film to protect kiwifruit trees from rain or girdling of trunks of kiwifruit trees alleviated the diseases at rates of 61.0-84.7 or 65.7-76.8%, respectively. The results suggest that trunk injection of acetic acids, girdling on trunks, and rainproof installation over kiwifruit trees can be applied as reasonable control practices to manage bacterial blossom blight in kiwifruit orchards in Korea.

Keywords  Actinidia deliciosa; bacterial blossom blight; kiwifruit; Pseudomonas syringae



New Zealand Journal of Crop and Horticultural Science, 2001, Vol. 29: 29-34

0014-0671/00/2901-0029 $7.00 (c) The Royal Society of New Zealand 2001



PDF file of entire paper: medium quality (469K); (scanned from paper original: notes about this process)

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