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Asefa et al  

 

Full Length Research Paper


Integrated Management of Potato Late Blight in the Bale Highlands, South Eastern Ethiopia, Using Varieties and Fungicide

 

Getachew Asefa, Seyfudin Mehadi, Yonas Worku and Mohammed Beriso

 

Oromia Agricultural Research Institute, Sinana Agricultural Research Center; PO. Box: 208; Bale-Robe, Ethiopia.

 

Corresponding author email: getachewas@yahoo.com

Received June 6, 2017; Accepted July 31, 2017
ABSTRACT

 

Bale Zone South Eastern Ethiopia is known for potato production, but the productivity of the crop is low due to disease and insect pests. Late blight caused by Phytophthora infestans is one of the most significant constraints to potato production in the Bale highlands. A study was conducted to assess the integrated effects of a fungicide (Mancozeb 80 WP) and three varieties (Kellecho, Hunde and Ararsa) on late blight of potato. The experiment was laid out in randomized complete block design in a factorial arrangement with three replications at three locations (Sinana, Goba and Disho districts). All variety, fungicide and variety by fungicide interaction showed highly significant (P<0.01) differences for all the characters, except for a number of tuber per hill. The highest total tuber yield (26.8 t ha-1) and the lowest disease severity (48.8%) were recorded from one of the improved varieties, Ararsa, which was sprayed with the fungicide at weekly interval. The highest disease severity and consequent lowest total tuber yield were recorded on local cultivar kellecho and four times application of Mancozeb at weekly interval was found to be effective for control of the disease on local cultivar kellocho. However, for Ararsa and Hundie, application of Mancozeb at twice a week interval was effective for management of late blight in the highlands of Bale.

 

 

 

Keywords: Late blight, Fungicide, IDM, Potato.

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