Late blight (Phytophthora infestans) management with fungicide and varietal combination of potato at Fagita Lekoma, North Western Ethiopia

被引：1
作者：
Fentahun Z. [1 ]
Abera M. [2 ]
Jenber A.J. [2 ]
机构：
[1] Plant Protection section, Southern Agricultural Research Institute, Arba Minch Agricultural Research Center, P.O. Box 2228, Arba Minch
[2] Department of Plant Sciences, College of Agriculture and Environmental Sciences, Bahir Dar University, P.O. Box 79, Bahir Dar
来源：
Indian Phytopathology | 2023年 / 76卷 / 2期
关键词：
Disease severity; Fungicides; Phytophthora infestans; Potato varieties;
D O I：
10.1007/s42360-023-00617-w
中图分类号：
学科分类号：
摘要：
Phytophthora infestans is a destructive disease in potato growing areas of Ethiopia. The experiment was conducted at Fagita Lekoma district during 2019 main cropping season to evaluate the effect of variety and fungicide combinations for late blight. In the study four potato varieties and two fungicides were used. Fungicide applications was started soon after the appearance of late blight symptom and continued at weekly intervals. The field experiment was laid out in factorial arrangement in Randomized Complete Block Design with three replications. The highest disease incidence (100%) at 52 day and PSI (76.68 and 63.92%) at 87 day was obtained from unsprayed plots of Key and Zengena varieties, respectively. Whereas, the lowest disease incidence and Percentage Severity Index was obtained from Belete and Gudene varieties both sprayed with Ridomil Gold 68% WG. The maximum disease progress rate (0.0930unit day− 1) was obtained from unsprayed plots of Key variety. On the other hand, the lowest rate (0.0405unit day− 1) were calculated from Belete variety sprayed with Ridomil Gold 68% WG. Maximum yield (31.66 t ha− 1) was gained from Belete variety combined with Ridomil Gold 68% WG. The highest MRR (1631.18%) obtained from local Key sprayed with Ridomil Gold 68% WG. The maximum net profit was obtained from Belete variety sprayed with Ridomil Gold 68% WG. Therefore, combination of moderately resistant variety Belete with fungicide applications, especially Ridomil Gold 68% WG is better for the management of late blight and sustainable production of potato for the study area. © 2023, Indian Phytopathological Society.
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页码：511 / 520
页数：9
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